Whole muscles can respond in a graded fashion to stimuli by varying
A. the force of contraction of individual muscle fibers.
B. the number of motor units recruited.
C. the amplitude of the action potential.
D. the frequency of stimulus.
E. thresholds.
B
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Which skin receptors allow the skin to adapt to changes in temperature?
A. Nociceptors B. Photoreceptors C. Thermoreceptors D. Tactile corpuscles
Describe the difference between a vesicular and a nonvesicular synapse?
What will be an ideal response?
Propagation of an action potential to the axon terminal triggers the opening of what kind of voltage-gated channels?
a. calcium b. sodium c. potassium d. acetylcholine e. dopamine
_______ chemical signals are released by cells and affect other cell types locally without being transported in blood
Fill in the blank(s) with the appropriate word(s).