Nucleic acids are digested within the
A. large intestine.
B. pancreas.
C. stomach.
D. mouth.
E. small intestine.
Answer: E
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Which of the following types of regulation involves binding to the active site?
A) Competitive inhibition B) Allosteric regulation C) Covalent modification D) Both B and C
Answer the following statements true (T) or false (F)
1. The skin composes about 6% of the body weight. 2. The glue-like basement membrane connects the connective tissue membrane to the underlying structures. 3. The parietal and visceral pleurae are actually two parts of a single, continuous membrane. 4. A possible serious complication of an infected appendix is pleurisy. 5. Keratin is a tough, waterproof protein that fills cells of the stratum corneum.
What is the role of reticular cells in the bone marrow?
A. They destroy malformed blood cells. B. They secrete colony-stimulating factors. C. They produce antibodies. D. They produce thymosin. E. They give rise to all formed elements of the blood.
Explain the decreased fertility commonly found in males with anabolic steroids use.
A. Exogenous testosterone will trigger a decrease in GnRH. B. Positive feedback will occur as a result of exogenous testosterone, leading to reduced sperm production. C. LH and FSH levels will increase in response to the exogenous testosterone. D. The adrenal cortex will increase production of endogenous testosterone, therefore decreasing sperm production.