Damage to the pyramidal cells of the cerebral cortex would directly affect
A) perception of pain.
B) sight.
C) voluntary motor activity.
D) hearing.
E) both perception of pain and voluntary motor activity.
Answer: C
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Which of the following is (are) true of the spleen?
A) It contains trabecular arteries. B) It contains areas of red and white pulp. C) It is the largest lymphoid organ in the body. D) It performs the same functions for the blood as the lymph nodes do for the lymph. E) All of the answers are correct.
A blood clot attached to a blood vessel wall is called a(n) ________.
A. thrombus B. embolus C. anticoagulant D. hemorrhage E. prostacyclin
Simple diffusion and facilitated diffusion differ in that facilitated diffusion requires assistance of a membrane protein to move substances across a membrane.
a. true b. false
The onset of puberty in females typically occurs between the ages of ________ and occurs ________ that in males.
A. 14 and 18; earlier than B. 12 and 16; at the same time as C. 11 and 16; earlier than D. 13 and 16; later than