________ are fixed macrophages located in the epithelia of the skin.
Fill in the blank(s) with the appropriate word(s).
Langerhans cells
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Atrial natriuretic peptide has the opposite effect of ADH
Indicate whether the statement is true or false.
Select the statement below that is not true with regards to the process of light adaptation
A) Visual acuity is diminished. B) Retinal sensitivity decreases. C) Rhodopsin is uncoupled from light transduction. D) The activity of rods is reduced by rapid bleaching of rhodopsin.
Mean arterial pressure is:
a. diastolic pressure + (systolic/3) b. systolic pressure + (pulse pressure/3) c. diastolic pressure + (pulse pressure/3) d. pulse pressure - (diastolic pressure/3) e. pulse pressure + (systolic pressure/3)
Essential hypertension may result from ________.
A. decreased ADH secretion B. a diet high in sodium C. decreased release of endothelin D. decreased sympathetic vasoconstriction