Which of the following is not a major activity of the stomach?
A. enzyme secretion
B. mechanical digestion
C. nutrient absorption
D. mucus secretion
E. HCl secretion
Ans: C. nutrient absorption
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It takes a swimmer 1 hour to cross a lake that is 1/2 mile wide. What is true of the swimmer's acceleration?
A. it is 1/2 mi/hr B. it is 1 mi/hr C. it is equal to velocity squared D. it cannot be determined from the information given
Low-grade fever is an effective defense for short periods of time because it
A) includes pyrogens that destroy the pathogens. B) slows the attack of phagocytes. C) increases temperature, which slows the growth of bacteria. D) increases iron in the blood.
The following represents a collection of spinal nerve roots hanging from the inferior end of the spinal cord
A) filum terminale B) cauda equina C) dorsal roots D) denticulate ligament
What region of the lymph node contains many mature B cells?
A) capsule B) medulla C) trabeculae D) cortex