The release of chemicals from an endocrine or exocrine gland is referred to as ______
A.
Absorption
B.
Diffusion
C.
Filtration
D.
Secretion
D
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Which of the following statements about the refractory period of neuronal or muscle membranes is TRUE?
A. In nerve cells, the absolute refractory period coincides with the period of increased K+ permeability. B. In skeletal muscle cells, the absolute refractory period lasts about as long as the twitch. C. The relative refractory period in neuronal membranes lasts about the same length of time as the absolute refractory period in cardiac muscle cell membranes. D. The refractory period in an alpha-motor neuron membrane is much briefer than the refractory period in a skeletal muscle cell membrane. E. In ventricular cells, the absolute refractory period coincides with the period of increased Na+ and Ca2+ permeability.
The ____________________ serves as the body's thermostat
Fill in the blank(s) with correct word
In the extrinsic pathway, damaged tissues release
A. activated factor V. B. calcium. C. factor VII. D. thromboplastin (tissue factor III) E. factor XII.
At any given time, more than half the total blood volume is found in
A. arteries and arterioles. B. venules and veins. C. capillaries. D. arterioles and venules.