____________________ ions trigger the release of acetylcholine by exocytosis from a portion of the vesicles
Fill in the blank(s) with correct word
Calcium
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A receptor that contains many mechanically-gated ion channels would function best as a
A) tactile receptor. B) chemoreceptor. C) photoceptor. D) thermoreceptor. E) light receptor.
With regards to circadian rhythms,
a. the hypothalamus supraoptic nucleus maintains them b. the suprachiasmatic nucleus is responsible for generating them c. they are brought about by fluctuating levels of clock proteins d. both a and b are true e. both a and c are true
The action potential of cardiac pacemaker cells is caused by ________.
A. inward diffusion of K+ B. inward diffusion of Na+ C. outward diffusion of K+ D. inward diffusion of Ca2+
Lipid-soluble drugs placed under the tongue
A. are more easily swallowed. B. can be detected by taste buds. C. are quickly dissolved and absorbed. D. are then easy to chew. E. are not readily absorbed.