Conduction speed is (or can be) enhanced by
A) altering extracellular sodium concentration.
B) myelin.
C) increasing the temperature.
D) altering extracellular potassium concentration.
E) myelin and increasing the temperature.
E) myelin and increasing the temperature.
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The trophoblast is located at the
A. periphery of the blastocyst. B. center of the blastocyst. C. periphery of the morula. D. center of the morula. E. center of the embryoblast.
Match each term with its definition or description.
a. 1 b. 2 c. 3 d. 4 e. 5 1. _____ Urethra 2. _____ Vas deferens 3. _____ Ejaculatory duct 4. _____ Seminiferous tubules 5. _____ Epididymis
When palpating the posterior cranium, you feel a ridge on the occipital bone that marks the superior extent of the muscles of the posterior neck. It is called the ________
A) superior nuchal line B) superciliary arch C) external occipital protuberance D) inferior nuchal line
The gate control theory of pain is best described by which of the following?
A. TRP channels are gated by temperature. B. Activation of low threshold mechanoreceptors can reduce or block the activity of ascending pain pathways. C. GABA inhibits neurons in the spinal cord. D. Following sensitization, a pain fiber begins responding to nondamaging tactile stimuli.