Epithelial cells of kidney tubules may have many microvilli. What is the reason for the microvilli?
A. Protection from abrasion
B. Lubrication
C. Sweeping away debris
D. More surface area for reabsorption
Answer: D
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Atrial depolarization causes the ________.
A. QRS complex B. T wave C. P wave D. first heart sound E. quiescent period
On day 14 of a typical 28 day menstrual cycle, LH concentration in the blood will be ________. The endometrium will be ________. Estrogen concentration in the blood is ________
A. level; sloughing off; low B. at or near a peak; near the end of the proliferative phase; relatively high C. low but rising; in the secretory phase; high D. at or near a peak; in the secretory phase; low E. level; starting the proliferative phase; level but high
A diffuse axonal injury:
A) is a specific, grossly observable brain injury that can easily be diagnosed with a computer tomography scan of the head. B) involves stretching, shearing, or tearing of the extension of the neuron that conducts electrical impulses away from the cell body. C) results in severe stretching or tearing of the portion of the nerve cell that receives sensory messages from the rest of the body. D) is generally associated with better neurologic outcomes than a cerebral concussion because permanent brain damage does not occur.
Which bone articulates with the coxal bone at the acetabulum?
A) sacrum B) femur C) humerus D) tibia E) fibula