The process of preventing micturition in spite of initiation of the reflex involves
a. the cerebral cortex
b. voluntary stimulation of the motor neuron supplying the external urethral sphincter
c. voluntary stimulation of the internal urethral sphincter via its parasympathetic nerve supply
d. both a and b
e. a, b, and c
D
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Which of the following is the best explanation for our perception of color?
A) Rods contain a single kind of visual pigment. B) Cones come in three types, each sensitive to different wavelengths of light. C) The foveae are densely packed with cones. D) As many as 100 cones may converge on one ganglion cell.
The kidneys keep the urine volume and composition essentially constant
Indicate whether the statement is true or false
Which of the following occurs during repolarization?
A) Voltage-gated potassium channels open, potassium flows into the cell and some voltage-gated sodium channels inactivate. B) Voltage-gated potassium channels open. C) Potassium flows into the cell. D) Some voltage-gated sodium channels inactivate. E) Voltage-gated potassium channels open and potassium flows into the cell.
Supination is the movement of the forearm in which the palm of the hand is turned anteriorly or superiorly
Indicate whether the statement is true or false