Which of the following cell types is diploid?
A. spermatid
B. mature sperm
C. primary spermatocyte
D. secondary spermatocyte
E. spermatozoa
C
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Trisomy-21 results in __________ syndrome.
Fill in the blank(s) with the appropriate word(s).
The extensor digitorum muscle is found in the
A. deep layer of the posterior compartment of the forearm. B. superficial layer of the posterior compartment of the forearm. C. superficial layer of the anterior compartment of the forearm. D. deep layer of the anterior compartment of the forearm.
The abducens nerve innervates which extrinsic eye muscle?
A) superior oblique B) medial rectus C) inferior oblique D) superior rectus E) lateral rectus
Baroreceptors notify the brain that the blood pressure has increased. The brain then notifies the blood vessels to dilate, thus lowering the blood pressure. Then baroreceptors notify brain that blood pressure has lowered thus blood vessels no longer dilate.
A) This is a negative feedback loop because having too many platelets in one area blocks blood flow. B) This is a positive feedback loop because the response prevents a person from hemorrhaging to death. . C) This is a positive feedback loop because the response reinforces the initial change. D) This is a negative feedback loop because the response opposes the initial stimulus. E) This is a neutral feedback loop because the positive and negative effects cancel each other.