What is an action potential?
A. The flow of electricity along an axon of a neuron in one direction
B. The flow of electricity along an axon of a neuron in multiple directions
C. The flow of electricity begun by stimulating the axon of a neuron
D. The flow of electricity along a dendrite of a neuron in one direction
Answer: A
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A patient who is on medications that block the RAAS is feeling faint during exercising. While being monitored on a treadmill, the doctor sees that his blood pressure remains low instead of increasing his level of activity. She explains that his medication is:
a) inhibiting vasodilation and keeping his blood pressure low while exercising. b) enhancing vasoconstriction and restricting his blood pressure from rising while exercising. c) inhibiting vasoconstriction and restricting his blood pressure from rising while exercising. d) enhancing vasodilation and increasing his blood pressure during exercise.
Enzymes and bicarbonate are considered exocrine secretions of the gastrointestinal system.
Answer the following statement true (T) or false (F)
What is delivered over the hypothalamic-hypophyseal portal system?
A) tropic hormones B) trophic hormones C) releasing and inhibiting hormones D) stimulating hormones
Explain the function of lacteals
A) They primarily deliver hormones to the digestive mucosa. B) They transport materials that cannot enter lymphatic capillaries. C) They transport materials that cannot enter blood capillaries. D) They increase the surface area of the small intestine. E) They release defensins and lysozyme.