Which situation describes a feedforward mechanism?
A. Blood glucose returns toward normal an hour after a meal.
B. The smell of rotten food on a plate triggers the vomit reflex.
C. A drop in core body temperature triggers shivering.
D. An increase in core body temperature stimulates sweating.
E. Food in the stomach triggers the production of stomach acid.
B
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Which of the following structures does not help to increase the absorptive surface area of the small intestine?
a. villi b. plicae c. lacteal d. microvilli
Epidural anesthesia is introduced to the epidural space between the ________ to block pain signals during pregnancy.
A. arachnoid mater and pia mater B. dural sheath and dura mater C. dural sheath and vertebral bones D. dura mater and pia mater E. dura mater and arachnoid mater
A nonsteroid hormone acts on a target cell by
A. directly causing protein synthesis. B. promoting phagocytosis. C. causing synthesis of a second messenger. D. stimulating cell division.
Identify the structures in the photo below
What will be an ideal response?