BIO 620: TEST 1 Name 9) (2 points) Given the pathway below give two different wa
ID: 145409 • Letter: B
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BIO 620: TEST 1 Name 9) (2 points) Given the pathway below give two different ways to reduce levels of Dopamine (using drug inhibitors and mutations) GCH-NH Phanytasanine (1) Phenylalanine C-CH-NH COOH 12) Hydroxylase c-CH2-NH2 HCOOH Ho Amino Acid Decarboxylase C-CH2-NH Dopamine CH2-NH2 Norepinephrine Epinephrino 0% OH 10) (1 point) Steroid hormones can be detected in BILE/URINE (circle one) 11) (2 points) What two organelles would you expect to see in high levels in the cells of an endocrine gland that produces a protein hormone?Explanation / Answer
Ans9)We can reduce level of dopamine by using inhibitors that block the enzyme Phenylalanine hydroxylase or tyrosine hydroxylase.This will stop the initial stages of dopamine formation.
Anti dopa drugs that remove dopa from the body will eventually decrease the dopamine levels.
Ans10)Steroid hormones found in bile or urine are-
Cortisol
Human chorionic gonadotropin(in case of pregnancy).
Pregnalenone
Some sex hormones as well.
11)The number of rough endoplasmic reticulum,golgi body will be more in protein hormone producing endocrine gland.This is because these are involved in protein synthesis.
Ans1)When level of calcium in blood decreases then parathormone is secreted and its level increase in blood.
Blood Ca levels drop of level of calcitonin increase in blood.
These loops are example of negative feedback regulation.
Ans2)This is an example of positive regulation because increase in level of insulin stimulates cells to secrete more insulin from pancreatic cells.So this is positive regulation.
Ans3)Autocrine secretion because in autocrine secretion the cells produce secretion that affect the cells they form.
Ans4)Paracrine because these secretions are affecting nearby cells.
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