A hormone is a ______ and the target cell is __________
A) regulatory molecule that controls secretions of other cells; a cell that synthesizes
hormones
B) molecule that has a metabolic effect on another cell; a cell that has receptors for
specific hormones
C) protein that stimulates other cells; the source of hormone secretions
D) molecule; a cell that does not have receptors
B
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The ________ connects the third and fourth ventricles.
Fill in the blank(s) with the appropriate word(s).
When the body is relying on internal energy reserves to continue meeting its energy demands, it is in the ________ state
A) postabsorptive B) absorptive C) starvation D) deprivation E) preabsorptive
In the cardiac and vascular function curves shown below, the solid curves represent the control state. The shift, shown by the dashed line, is explained by:
A. administration of positive inotropic agent B. hemorrhage C. infusion of isotonic saline D. increase in peripheral vascular resistance E. administration of a negative inotropic agent
Which of the following is (are) true of the rods?
A. Function in dim light B. Located in the fovea centralis C. See color D. All apply.