What is a consequence of the properties of bitter receptors?
a. Because bitter receptors are heat-sensitive, all hot foods taste somewhat bitter
b. Because bitter receptors increase with age, old people reject many foods.
c. Because bitter receptors cluster in one spot, a food's taste depends on where you chew it.
d. Because we have many types of bitter receptor, we do not taste low bitter concentrations.
d
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Smoking increases the risk of cardiovascular disease. What condition affecting the cardiovascular system occurs when plaque builds up on coronary arteries, causing the blood flow through these arteries to become constricted?
a. arteriosclerosis b. veinosclerosis c. coronoslerosis d. atherosclerosis
What is the difference between an agonist and an antagonist? a. An agonist produces helpful effects and an antagonist produces harmful effects. b. An agonist produces harmful effects and an antagonist produces helpful effects. c. An agonist decreases synaptic activity and an antagonist increases it
d. An agonist increases synaptic activity and an antagonist decreases it.