What heart tissue releases platelet-activating factor when too little O2 is available in the coronary vessels?
a. pericardium
b. endothelium
c. myocardium
d. epicardium
e. Purkinje fibers
b
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Which of the following is incorrect pertaining to fontanelles?
A) The remains of the anterior fontanelle is often indicated by the metopic suture. B) A bulging fontanelle indicates excessive intracranial pressure. C) They facilitate molding. D) Lambda indicates the site of the posterior fontanelle. E) Fontanelles are normally not palpable after 18 months of age.
Which of the following transporters are known to transport thyroid hormones into target cells?
A) Mineralocorticoid receptor B) MCT8 C) Sodium-iodide symporter D) TRPV6 E) CaSR (calcium sensing receptor)
In which of the following would the ratio of motor neurons to muscle fibers be the greatest?
A) large muscles of the upper arms B) postural muscles of the back C) muscles that control the eye D) leg muscles E) the calf muscle
Where are the cell bodies of lower motor neurons located?
A) motor area of cerebral cortex B) anterior horn of spinal gray matter C) dorsal horn of spinal gray matter D) brainstem