Because so many Na+ ions move into a cell during an action potential and so many K+ ions move out, no further action potentials can be generated in a given membrane until the Na+, K+-ATPase pumps can restore the concentration gradient
Indicate whether the statement is true or false.
FALSE
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Maturation of sperm occurs in the
A. ejaculatory duct. B. seminal vesicles. C. epididymis. D. prostate gland. E. bulbourethral glands.
What provides access for blood vessels entering and leaving the liver?
A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
This figure shows an anterior view of the right orbit. What feature does number 4 indicate?
A. Trochlea B. Common tendinous ring C. Optic nerve D. Optic canal E. Central tendinous ring
What would occur if ACh was not removed from the nicotinic receptors on skeletal muscle cells?
a. the cell would relax. b. the cell would repolarize with the opening of chloride channels. c. the cell would remain contracted until fatigued. d. sodium would continue to move into the cell causing excitation. e. both (c) and (d) above.