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17 Cards in this Set
- Front
- Back
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paracrine hormones...
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are released into the extracellular space and diffuse to neighboring target cells.
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Which of the following chemicals is NOT a hormone?
A- Retinoic acid B- NO C- cyclic AMP D- vitamin D |
C
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which of the following would be the most useful quantitative bioassy for insulin?
D- to fractionate extracts from the pancreas of pigs and inject them into insulin-deficient mice and quantify the changes of glucose in blood and urine. |
yep
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which of the following is the fastest acting hormone?
A- epinephrine B- thyroid hormones C- testosterone D- Viatmin D |
A
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peptide hormones (like insulin) and amine hormones (like epi) trigger very rapid physiological or biochemical responses in target tissues. These types of hormones act through plasma membrane receptors to lead to change in the activity of preexisting enzymes in the cell.
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yep
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How do steroid hormones change the expression of genes in target cells?
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they bind their receptors in the nucleus, and the hormone-receptor complex binds DNA to alter the transcription of specific genes.
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the release of insulin from the pancreas is triggered or stimulated by what?
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the opening of Ca^2+ channels in the plasma membrane
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the metabolic effects of epi and glucagon differ in that...
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only epi stimulates glycolysis.
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the coordination center for the endocrine system is...
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the hypothalamus.
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after several days of starvation, ketone bodies accumulate in the blood because why?
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a lack of oxaloacetate prevents acetyl-CoA entry into the TCA
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all hormones
A- are able to enter their target cell B- are water-soluble C- act through binding receptors D- act by changing the expression of specific genes |
C
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What is the basis for how radioimmunoassays (RIAs) are used to measure the amount of a specific hormone present in a sample?
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Samples containing higher amounts of the specific hormone displace more radiolabeled hormone from the hormone-specific antibody.
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of the two types of diabets, which of the following situations is unique to type 2 diabetes?
A- An inability to take up glucose efficiently from the blood B- an inability to respond to insulin C- an inability to produce sufficient insulin D- High levels of glucose in the urine. |
B
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what is the role of serum albumin in the transport of fatty acids?
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it carrier FREE FATTY ACIDS to the heart and sk mm, whcih absorb and oxidize the free fatty acids as a major fuel.
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which of the following occurs in the response to persistent anxiety?
A- the hypothalamus produces hormones that travel to the pituitary gland B- Cortisol travels to the hypothalamus C- The CNS sends electrical signals to the pituitary gland D- the hypothalamus produces cortisol |
A
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which of the following is TRUE about the interconversions of nutrients?
A- Amino acids can be converted to glucose and lipids B- glucose can be converted to amion acids and lipids C- Lipids can be converted to glucose D- lipids can be converted to amino acids |
A
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In what way is fast-twitch muscle different from slow-twitch muscle?
A- fast-twitch muscle is richer in mitochondria B- fast-twitch muscle is less resistant to fatigue C- fast-twitch muscle is more likely to generate ketone bodies D- fast-twitch muscle is better supplied with blood vessels |
B
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