The receptors in a sour taste bud bind _____ which block ______ channels. This depolarizes the membrane because __________
Fill in the blank(s) with the appropriate word(s).
Ans: H+; K+; positive ions continue to leak into the cell but ar prevented from leaking out
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Poliomyelitis is an RNA virus that can invade the nervous system and cause paralysis within a matter of hours. Polio has been virtually eliminated world-wide by which of the following?
a. Antibiotics b. Vaccination c. Mosquito control d. Quarantine e. Improve water quality
If a person uses Percocet, a morphine relative, to which of these drugs might that person develop cross-tolerance?
A) ecstasy B) cocaine C) heroin D) marijuana
Vitamin D causes the parathyroid to inhibit new PTH synthesis.
a. true b. false
Through which process do bacteria recycle nutrients in the environment?
A) Decomposition B) Photosynthesis C) Conjugation D) Binary fission E) Endospore formation