The average menstrual cycle is about ________ days long; ovulation occurs on about day ________.
A. 24; 14
B. 30; 24
C. 32; 16
D. 20; 10
E. 28; 14
Answer: E
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Which of the following is not a reason that somatic reflexes act faster than visceral reflexes?
A. The effector pathway in the somatic reflex arc is myelinated. B. The effector pathway in the visceral reflex arc involves more neurons. C. The effector pathway in the visceral reflex arc involves more chemical synapses. D. Some of the neurons in the effector pathway in the visceral reflex arc are unmyelinated. E. The effector organs in the somatic reflex are closer to the spinal cord.
Explain why heparin is used as an anticoagulant in the treatment of thrombotic strokes but contraindicated in a subarachnoid hemorrhage
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Which of the following is required to produce calcitrol in the kidneys?
A) calcium B) sodium C) vitamin C D) vitamin A E) vitamin D
The outermost wall of an artery or vein is called the ________ and in large arteries and veins contains the ________.
A. tunica media; smooth muscle B. tunica externa; valves C. tunica intima; endothelium D. tunica intima; basement membrane E. tunica externa; vasa vasorum