Scenario 1: The bell rings at the end of class and you jump up to head for the door. When you stand up, you feel light-headed. What happens in your body to keep you from continuing to feel light-headed?
1. List each body system that is at work. You must explain how the body system is functioning and the main organs that the body system is using. In your explanation, explain how various body systems and organs are working together.
2. List any body system that might be suppressed or lessened. Explain why.
PLEASE DONT SCAM
Answers
Answer:
Explanation:el sapo
Answer:When we stand up from sitting or lying down, our blood vessels respond to gravity by narrowing to prevent our blood pressure falling. This ensures a steady supply of oxygenated blood to the brain.
Orthostatic hypotension is a form of low blood pressure. It happens when the blood vessels do not constrict (tighten) as you stand up. It is usually a symptom of an underlying disorder rather than a disease in itself. The condition is also known as postural hypotension.
Everyone is likely to experience a mild form of postural hypotension at some time. It’s the lightheaded feeling you may get if you leap out of bed very quickly.
Orthostatic hypotension — also called postural hypotension — is a form of low blood pressure that happens when you stand up from sitting or lying down. Orthostatic hypotension can make you feel dizzy or lightheaded, and maybe even cause you to faint.
Orthostatic hypotension may be mild, and episodes can last for less than a few minutes. However, long-lasting orthostatic hypotension can signal more-serious problems, so it's important to see a doctor if you frequently feel lightheaded when standing up.
Occasional (acute) orthostatic hypotension is usually caused by something obvious, such as dehydration or lengthy bed rest, and is easily treated. Chronic orthostatic hypotension is usually a sign of another health problem, so treatment varies.
Dizziness is a word that is often used to describe two different feelings. It is important to know exactly what you mean when you say "I feel dizzy," because it can help you and your doctor narrow down the list of possible problems.
Lightheadedness is a feeling that you are about to faint or "pass out." Although you may feel dizzy, you do not feel as though you or your surroundings are moving. Lightheadedness often goes away or improves when you lie down. If lightheadedness gets worse, it can lead to a feeling of almost fainting or a fainting spell (syncope). You may sometimes feel nauseated or vomit when you are lightheaded.
Vertigo is a feeling that you or your surroundings are moving when there is no actual movement. You may feel as though you are off balance, spinning, whirling, falling, or tilting. When you have severe vertigo, you may feel very nauseated or vomit. You may have trouble walking or standing, and you may lose your balance and fall.
Although dizziness can occur in people of any age, it is more common among older adults. A fear of dizziness can cause older adults to limit their physical and social activities. Dizziness can also lead to falls and other injuries.
Lightheadedness
It is common to feel lightheaded from time to time. Brief episodes of lightheadedness are not usually the result of a serious problem. Lightheadedness often is caused by a momentary drop in blood pressure and blood flow to your head that occurs when you get up too quickly from a seated or lying position (orthostatic hypotension). Ongoing lightheadedness may mean you have a more serious problem that needs to be evaluated.
Related Questions
Represent 1/4 and 3/4 in three ways
Answers
Answer:
1. 1/4
2. 0.25
3. 25%
1. 3/4
2. 0.75
3. 75%
Hope this helps :)
Which of the following statements is NOT true about the stratosphere?
A.
The stratosphere contains a layer of ozone.
B.
The stratosphere absorbs ultraviolet radiation which protects life on Earth.
C.
Commercial jet aircraft avoid the stratosphere due to the high turbulence there.
D.
The stratosphere is above the troposphere and below the mesosphere.
Answers
Answer:
Explanation:
After doing some g0ogle searches, I believe C is incorrect. Stated from g0ogle, "Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. " It seems to me that jets avoid the troposphere, which is below. <3
Answer:
C
Explanation:
2. Sam and Jerry are having a discussion in their Environmental Science class. Sam
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
says that biotic factors determine what abiotic factors can be in an ecosystem. Who
is correct? Use an example to support your answer. (2 points)
Answers
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
When a cow is cloned to make exact copies of the adult cow, what is this called?
A) embryonic cloning
B) therapeutic cloning
C) SCNT
Answers
Crabs, marine fish, shrimp and other shellfish live at least part of their lives in this feature.
O river basins
O estuaries
O swamps
O waterfalls
Answers
Crabs, marine fish, shrimp, and other shellfish are often found living in estuaries. An estuary is a coastal body of water where freshwater from rivers mixes with saltwater from the ocean, creating a unique and dynamic environment.
This mixture of water creates a diverse range of habitats that provide the perfect conditions for shellfish to grow and thrive. Estuaries are also known for their abundance of nutrients, which feed the many different species that live there. The sheltered nature of estuaries also provides protection for shellfish from predators, allowing them to grow and reproduce.
In addition to shellfish, estuaries are also home to a wide range of other marine creatures, including birds, reptiles, and mammals. Overall, estuaries play a crucial role in the life cycle of many different species, making them an important ecosystem to protect.
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what happens when gene expression proceeds abnormally?
Answers
When gene expression proceeds abnormally, it can result in various genetic disorders and diseases.
Gene expression refers to the process by which the information encoded in a gene is used to produce a functional product, such as a protein. Abnormal gene expression can occur due to mutations in the DNA sequence, epigenetic changes that alter gene activity, or errors in the regulation of gene expression.
These abnormalities can lead to a range of diseases, from rare genetic disorders such as cystic fibrosis and sickle cell anemia, to more common conditions such as cancer, diabetes, and cardiovascular disease. In some cases, abnormal gene expression may result in the production of a non-functional or harmful protein, while in others, it may result in the absence of a necessary protein.
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If an organism has high biological fitness in one environment, does that mean that it would also have high biological fitness in another environment? Why or why not?
Answers
Answer:
The answer is no, high biological fitness in one environment doesn't have to be high in another environment. Biological fitness is a term used in evolutionary biology and it is the quantitative representation of how a genotype (or phenotype) is successful (reproductively) in a certain environment. The biological fitness of an organism is dependent on its ability to survive and reproduce in a given environment. If different traits or alleles increase the fitness of an organism, those alleles will consequently increase in the gene pool, and that trait will increase in the population.
I hope this helped you out some~ <3
-Dream
Building block of life test
Answers
Answer: Cells are the building block of Life
Explanation:
What would be a direct consequence of the disappearance of nitrogen-fixing prokaryotes.
Answers
The disappearance of nitrogen-fixing prokaryotes would have far-reaching consequences on the earth's ecosystems and would require innovative solutions to mitigate the impacts.
If nitrogen-fixing prokaryotes were to disappear, there would be a significant impact on the global nitrogen cycle. Nitrogen is an essential element required by all living organisms, but atmospheric nitrogen cannot be used directly by most organisms. Nitrogen-fixing prokaryotes are responsible for converting atmospheric nitrogen into a usable form that can be taken up by plants and other organisms. Therefore, the disappearance of nitrogen-fixing prokaryotes would result in a reduced availability of nitrogen for other organisms, leading to nitrogen deficiency and ultimately, reduced growth and productivity. This could also lead to an increase in the use of nitrogen fertilizers, which could have negative environmental impacts such as eutrophication.
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Genetics is the study of
A: Cell Division
B: Heredity
C: Body systems
D: Sexual Reproduction
Answers
Answer:
B. Heredity
Explanation:
I hope this helps.
Choose claim a or b and explain based on your new found understanding
If an object sinks in water and has a mass of 20kg you know that:
A. The volume of the object is more then 20L
B. The volume of the object is less then 20L
Answers
Answer:
A. The volume of the object is more then 20L
Explanation:
Density of a substance is calculated by dividing its mass by its volume. According to this question, an object of mass 20kg is involved. A volume of 20Litres is 0.02 millilitres (mL). This means that the density of an object with volume 0.02mL is 20kg/0.02 = 1000kg/mL.
However, an object will only sink in water if it's density is higher than that of water, which is 1000kg/mL. This means that for the object in this question to sink, its density must be more than 1000kg/mL. This applies to scenario A i.e volume of the object must be more then 20L to have a density higher than 1000kg/mL.
When there is ________
carbon (in the form of carbon
dioxide) in abiotic matter,
carbon is
available to producers for making
energy storage molecules.
Answers
When there is MORE carbon (in the form of carbon dioxide) in abiotic matter, carbon is available to producers for making energy storage molecules.
What is abiotic matter?Abiotic matter refers to any non-living material or substance that is not derived from living organisms. This includes various inorganic materials such as rocks, minerals, water, gases, and other substances that are not directly associated with life processes.
Abiotic matter is important in various scientific fields such as geology, chemistry, and physics, as it plays a significant role in the formation and functioning of the physical world.
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The diagram to the right represents steps in sexual reproduction.
Which of the following occurs in the step labeled "Z"?
A Fertilization
B. Meiosis
C. Mitosis
D. Translocation
Answers
Answer:
C. Meiosis
Explanation:
1. according to the punnett square, what were the chances that emma would be heterozygous/carrier?
Answers
The Punnett Square charted out the chances that Emma would be heterozygous or a carrier as 25%. In order to analyze this, it is important to understand how the Punnett Square works.
The Punnett Square utilizes genetic information from two different parents or sources in order to predict the possible offspring outcomes. It organizes and arranges each allele in different combinations, with the most common allele at the top of each box in a square. In this specific Punnett Square, the topalleles for each parent involved were S and s with the dominant-allele S being used for this example.
As such, the square reveals that for each of the four possible gamete combinations among the parents, there is one potential offspring result Combo-A which is composed of both dominant-alleles (SS) and one potential offspring result Combo-B which is composed of both recessive-alleles (ss). Finally, there is one potential offspring result Combo-C which is composed of both heterozygous-alleles (Ss).
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The oil component found in tears is produced by the ________.A) lacrimal glandsB) ciliary glandC) conjunctivaD) tarsal glands
Answers
The oil component found in tears is produced by the tarsal glands, which are small sebaceous glands located in the eyelids. Option D is correct.
These glands are responsible for secreting a lipid-rich substance that helps to prevent the evaporation of tears and maintain the stability of the tear film. The tear film is composed of three layers: the outer lipid layer, the middle aqueous layer, and the inner mucin layer.
The lipid layer, produced by the tarsal glands, helps to keep the tear film from evaporating too quickly, while the aqueous layer provides nutrients and oxygen to the cornea, and the mucin layer helps to spread the tear film evenly over the surface of the eye.
If the tarsal glands become blocked or dysfunctional, it can lead to a condition known as meibomian gland dysfunction (MGD), which is a common cause of dry eye disease. In MGD, the quality and quantity of the lipids produced by the tarsal glands are compromised, leading to increased evaporation of tears and dryness of the eyes.
Treatment for MGD typically involves warm compresses, lid massage, and other methods to help unclog the glands and improve the quality of the oil secretions. Option D is correct.
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Dolphins supporting a sick dolphin by swimming under it so it can rest is an example of
parasitism
parasitism
mutualism
mutualism
competition
competition
predator-prey
predator-prey
altruism
Answers
Answer:
altruism
Explanation:
i was stuck between mutuaism and alturism, but just boiled it down to alturism.
mutualism is where two or more species benifits, so like flowers and bees. but seeing how is just dolphins, it dosent make sense
alturism is where "behavior of an animal that benefits another at its own expense."
the dolphin is helping the other dolphin just because they can
Calculate Based on Figure 1-2, if you have 2 L of water, how many milliliters do you have?
Answers
Answer:
2 000ml
Explanation:
1 L of water is made up with 1000ml so we combine two 1000ml to make 2L which is 2000ml
Question 14
The energy that drives the water cycle originates from:
a
The sun
b
The global wind system
c
Surface and ground water
d
Thermohaline circulationL
Answers
Answer:
the sun
Explanation:
the sun is energy that controls all weather activity. (pretty much)
main parts of the male reproductive organ and their functions.....
Answers
Answer:
penis
Explanation:
sex
You are the head of an international granting agency that assist farmers with soil conservation and sustainable agriculture. You have $10 million to disburse. Your agencies staff has decided that the finding should go to farmers in an arid area of Africa prone to salinization What type of projects would you recommend funding in each of these areas, how would you apportion your funding among them, and why?
Answers
The projects that will receive funding in arid areas of Africa prone to salinization include:
Reforestation and irrigation projects -will receive about 50% of the funds.Cover-crop and salt-tolerant crop farming will receive about 30% of the funds.Desalinization projects will receive about 0% of the funding.What is salinization?Salinization is the process whereby the mineral salt content of the soil in an area increases as a result of adverse environmental conditions such as drought.
The projects that will receive funding in arid areas of Africa prone to salinization include:
Reforestation and irrigation projects - these will receive about 50% of the funds as reforestation and irrigation helps reduce soil salinity.Cover-crop and salt-tolerant crop farming will receive about 30 % of the funds as these crops help reduce soil salinityDesalinization projects will receive about 30% of the funding.In conclusion, salinization of soil poses a big threat to crop production in arid regions of Africa.
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Where do animals get the glucose to get energy from cellular respiration?
Answers
Answer:
Animals obtain glucose in their diet. During metabolic reactions, animal cells use glucose: to make glycogen which is stored in the liver and muscle cells to make lipids from fatty acids and glycerol All cells require glucose for respiration.
Explanation:
Answer:
oxidation of carbohydrates obtained from food.
A pea plant with purple flowers was crossed with a pea plant with white
flowers producing 50 plants with only purple flowers. On selfing, these
plants produced 483 plants with purple flowers and 161 with white
flowers.
(a). What will be the set of genes present in the F1 generation?
(b). Give reason why only purple flowered plants are observed in F1
progeny.
(c). Give the phenotype of F2 generation, When F1 were self-pollinated.
What can you conclude about the nature of the two traits?
Answers
Explanation:
b. purple flowered plant are observed in the first progeny because the purple flower gene is dominant to the white flower gene
The heart has 4 valves. explain how one of them works.
(no plagiarism please!!) i'll mark brainliest!!! (20 points)
Answers
Mitral Valve
Explanation:
The valves are made of strong, thin flaps of tissue called leaflets or cusps.
The leaflets open to let blood move forward through the heart during half of the heartbeat. They close to keep blood from flowing backward during the other half of the heartbeat.The Chordae tendineae and papillary muscles keep the leaflets stable to prevent blood from flowing backward. The mitral valve has only two leaflets. The leaflets are attached to and supported by a ring of tough, fibrous tissue called the annulus. The annulus helps to maintain the proper shape of the valve, and of course hold the leaflets in place.
Where is the carbon taken in by plants during photosynthesis stored?a. the groundb. plant structuresC. the aird. all of the above
Answers
The carbon is taken from the air and is used in photosynthesis to produce glucose (from carbon dioxide and water reacting with the sunlight). This carbon enter the leaves through the stoma and is incorporated into organic compounds within the plant structure (being stored there).
Therefore, the correct answer is b. plant structures.
Note: your teacher will review your response to this question to ensure you receive proper credit for your answer. The pH scale is a measurement system that indicates the concentration of _______ in solution.
please help
Answers
Answer:
hydrogen and hydroxide ions
Explanation:
The pH scale indicates the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in a solution.
What was the habitat of mussels and other deep sea animals studied by the gulf of mexico deep sea biology expedition
Answers
The habitat of mussels and other deep sea animals is freshwater habitat
Mussels of course are among the most studied animals found near hydrothermal vents
What are living organisms?Living organisms; be it plants or animals are any organic or living system which is composed of cells and function as an individual entity.
Generally, all living organisms share a number of key characteristics or functions such as movement, respiration, homeostasis, reproduction, growth, evolution, competition and others.Animals and plants also posesses systems such as the digestive, skeletal, transport, nervous, excretory, respiratory and reproductive system. Living organisms are also taxonomically classified as either unicellular microorganisms or multicellular plants and animalsSo therefore, the habitat of mussels and other deep sea animals is freshwater habitat
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name the organ that is responsible for removal of carbon dioxide during cell respiration?A. lungsB. liverC. pancreasD. gail bladder
Answers
Answer: A
Explanation:
In the human body, carbon dioxide is formed intracellularly as a byproduct of metabolism. CO2 is transported in the bloodstream to the lungs where it is ultimately removed from the body through exhalation.
Describe three structural differences between prokaryotic and eukaryotic cells.
Answers
Answer:
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in the cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.
Explanation:
:)
During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to compete for food or space. What type of population growth did they likely exhibit
Answers
Answer: Exponential
Explanation:
The main requirement for the population of a species to grow is food. When there is food, a organisms that are born will be able to live longer because food will be able to sustain them.
This is what happened with humans during the Neolithic Revolution when we began farming.
The general trend is that the more food that is available, the higher the population growth. When these butterflies arrived and found no competition for food, their population would increase in the highest way possible which is exponentially because there would be plenty of food to go around.
Answer:
Exponential growth
Explanation:
Without any competition for food or space, the butterfly species likely experienced exponential growth.
The lack of competition would have allowed the population to flourish, as they would have excess amounts of resources, food, space, and other limiting factors.
So, they most likely exhibited exponential growth.
The set of proteins in the cristae of the mitochondrion, which collectively extract the energy from reduced coenzymes to form atp, are called the.
Answers
Cell respiration involves different steps, among which there is the oxidative phosphorilation that produces and stores ATP. The answer is the electron transporter chain.
ELECTRON TRANSPORTER CHAIN -oxidative phosphorylation-
The electron transporter chain + chemiosmosis constitute the process of oxidative phosphorylation.
Chemiosmosis
Chemiosmosis refers to ATP production through a proton gradient.
Electron transporter chain
The electron transporter chain is a series of molecules and proteins located in the internal mitochondrial membrane.
It constitutes a series of enzymatic reactions to release and save energy for the correct functioning of the organism.
Along the chain, there are four proteinic complexes in the membrane, I, II, III, and IV, that contain the electrons transporters and the enzymes necessary to catalyze the electrons' transference from one complex to the other.
Different redox reactions occur to pass electrons along the chain.
Released energy creates a proton concentration gradient used to synthesize ATP.
Steps in the electectron transporter chain1) NADH provides electrons to the first complex, Complex I. From there, electrons go to the coenzyme Q that carries them to complex II. Meanwhile, complex I pomp four protons to the intermembrane space.
2) Complex II receives electrons from CoQ and also receives electrons from FADH2. Electrons are sent from complex II to ubiquinone Q, which carries these electrons to complex III.
3) Complex III receives electrons from ubiquinone Q and pomps protons to the intermembrane space. Electrons are transferred to Cytochrome c.
Electrons travel from cytochrome c to complex IV.
4) Complex IV is the last complex that pomps protons to the intermembrane space.
5) Electrons are sent to O₂ molecules, which also receive protons in the matrix to create water molecules. Four electrons are needed to produce two water molecules from one O₂ molecule.
The proton gradient is used to produce ATP molecules.
In conclusion, the set of proteins in the cristae of the mitochondrion, which collectively extract the energy from reduced coenzymes to form atp, are called the electron transporter chain.
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