All the cells of which layer of the skin are transparent and flat?
a. stratum germinativum
b. stratum lucidum
c. stratum spinosum
d. stratum granulosum
b
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The cells lining the proximal convoluted tubule
A) are closely associated with unusual smooth muscle fibers. B) reabsorb water and reabsorb or secrete sodium, potassium, hydrogen, and bicarbonate ions. C) are not permeable to water and solutes. D) are unusually tall, and their nuclei are clustered together. E) reabsorb organic nutrients, plasma proteins, and ions from the tubular fluid.
Binding of neurotransmitter to which of the following receptors on an effector would likely cause inhibition of the effector?
a. alpha-1 b. alpha-2 c. beta-1 d. Both a and b e. Both a and c
Which of the following is a normal hematocrit value?
A. 78% B. 12.5 mg/dL C. 5.0 X 106 RBCs/L D. 33 mg E. 42%
The tendency for water molecules to stick or cling to another surface is called ________
A) solubility B) adhesion C) cohesion D) reactivity