Ions of ________ initiate the release of a neurotransmitter, such as acetylcholine, via ________ into the synaptic cleft.
Fill in the blank(s) with the appropriate word(s).
calcium; exocytosis
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Which of the following are examples of amplification of a hormone signal?
I) Epinephrine initiates an enzyme cascade. II) Steroids bind hormone-response elements in the cell and initiate transcription of many genes. III) A quantity of 0.09 mg of growth hormone leads to a 10,000-mg weight gain in a cow. IV) Different cell types have different receptors capable of binding the same hormone. A) only I and III B) only II and IV C) only I, II, and III D) only II and III E) I, II, III, and IV
A spider would be much less harmful if it lacked:A
spinnerets. B. eye spots. C. labial palps. D. chelicerae. E. mandibles.
In which ribosome site would you find the uncharged tRNA?
A) E site B) A site C) P site
Signs and symptoms of hypoglycemia may include:
A) Bradycardia B) Combative behavior C) Flaccidity D) Warm, moist skin