The main function of tonsils is to detect and protect against infections agents that are
A. ingested or inhaled.
B. in the lymph.
C. secreted by salivary glands.
D. in the blood.
Answer: A
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Of the following types of camelid, which are the smallest with the highest-quality wool?
A) llamas B) alpacas C) vicunas D) guanacos
Distinguish between the two types of supporting tissues with respect to their characteristic fibers
A) Bone contains only elastic fibers, whereas cartilage can contain collagen, elastic, and reticular fibers. B) Bone contains only collagen fibers, whereas cartilage can contain collagen, elastic, and reticular fibers. C) Bone contains only reticular fibers, whereas cartilage can contain collagen, elastic, and reticular fibers. D) Bone can contain collagen and elastic fibers, whereas cartilage contains only collagen fibers. E) Bone can contain collagen, elastic, and reticular fibers, whereas cartilage contains only elastic fibers.
Which part of the reflex arc is associated with interneurons?
a. sensory receptor b. afferent pathway c. integrating center d. efferent pathway e. effector
If a drug is administered to block the heart's adrenergic receptors, how is heart rate affected during exercise?
A) The heart will stop beating. B) Heart rate will increase in response to the drug. C) Heart rate will be unable to increase in response to exercise. D) The drug has no effect on heart rate during exercise.