Tetrodotoxin from puffer fish interferes with the formation of action potentials by blocking
A. voltage-dependent sodium channels.
B. voltage-dependent potassium channels.
C. ligand-gated sodium channels.
D. ligand-gated potassium channels.
Answer: A
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A farmer always uses the same squeaky wheelbarrow to carry feed out to his sheep. When he does this, the sheep head for the feed trough in anticipation. In this example, noise of the wheelbarrow would be a(n):
A. unconditioned stimulus B. unconditioned response C. conditioned stimulus D. conditioned response
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What will be an ideal response?
Which of the following is NOT a general principle of nonverbal communication?
a. May contradict verbal messages c. Conveys emotions b. Ambiguous d. Single-channeled