Which of the following cranial nerves does NOT originate from the brainstem?
A) abducens
B) hypoglossal
C) olfactory
D) trigeminal
Ans: C) olfactory
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The activated lymphocytes must make thousands of copies of themselves in order to fight off the thousands of pathogens reproducing in the body. This reproduction of lymphocytes is called ________
A) Immunization B) Differentiation C) Lymphocyte proliferation D) Lymphocyte activation
Reflexes that activate muscles on the same side of the body as the stimulus are called
A) contralateral. B) ipsilateral. C) monosynaptic. D) involuntary. E) polysynaptic.
Norepinephrine (NE) is released from sympathetic fibers in response to a sudden drop in mean arterial pressure (MAP). What does NE do to help return MAP to normal?
A. NE release increases total peripheral resistance leading to an increase in MAP B. NE acts on cells of the SA node to increase contractility C. NE release at ventricular cells increases the force of contraction and decreases the duration of systole D. NE stimulates the release of epinephrine from the adrenal medulla E. NE released at the SA node increases the slope of the pacemaker potential F. NE causes vasodilation of many arterioles leading to increased MAP
All of the following are true of the allantois except
A) it derives partly from endoderm. B) it projects into the umbilical stalk. C) it derives partly from mesoderm. D) part will develop as the urinary bladder. E) it acts as the fetal bone marrow.