When Leptin levels are high, (A)________are released by arcuate neurons. This (B)_____ the secretion of TSH and ACTH from the pituitary, followed by a (C)__________ the metabolic rate.
a. (A) aMSH and CART (B) decreases (C) rise in
b. (A) aMSH and CART (B) decreases (C) lowering of
c. (A) aMSH and CART (B) increases (C) rise in
d. (A) NPY and AgRP (B) increases (C) rise in
e. (A) NPY and AgRP (B) decreases (C) rise in
Answer: c. (A) aMSH and CART (B) increases (C) rise in
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Thorough mixing of oxygen and nutrients within a lake occurs in:
a. winter and summer b. winter and spring c. spring and summer d. spring and autumn e. summer and autumn
A thick filament of muscle is composed primarily of the protein
A. pectin. B. myoglobin. C. hemoglobin. D. actin. E. myosin.
Which of the following is NOT a characteristic of phospholipids?
A) they are found in cellular membranes. B) they can form micelles and bilayers. C) they contain fatty acids that associate with water. D) they contain a hydrophilic phosphate "head." E) they contain two fatty acids and a phosphate functional group.
Which of the following is not a process that regenerates ATP?
A. reductive phosphorylation B. substrate-level phosphorylation C. oxidative phosphorylation D. photophosphorylation