If a hyperpolarizing graded potential and a depolarizing graded potential of similar magnitudes arrive at the trigger zone at the same time, what is most likely to occur?
A) An action potential is fired off more quickly than usual.
B) Nothing. They will cancel each other out.
C) The cell becomes easier to excite.
D) The cell becomes hyperpolarized.
E) The cell dies.
B) Nothing. They will cancel each other out.
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Mild-moderate exercise is associated with:
A. increases in arterial PCO2 B. decreases in arterial PO2 C. normal pH D. lactic acidosis E. anaerobic metabolism
A joint that allows limited movement is called a(n):
a. synarthrosis b. amphiarthrosis c. diarthrosis d. synovial
All hormones
a. are regulated by the hypothalamus b. initiate synthesis of new proteins c. are secreted by endocrine glands through ducts into the blood d. must combine with specific receptors on the target cells in order to exert their effects e. are eventually inactivated by enzymes in the liver, kidneys, blood, or target cells
The DRG consists mostly of __________________ (inspiratory or expiratory) neurons
Fill in the blank(s) with correct word