Which of the following cell types cannot renew themselves by division?
A) liver and heart
B) nerve and muscle
C) skin and nerve
D) gastrointestinal and skin
Ans: B) nerve and muscle
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Which of the following is NOT true of long-term potentiation (LTP)?
A. Associated with the removal of AMPA glutamate receptors B. Repeated stimulation enhance excitability C. It is a form of synaptic plasticity D. Associated with insertion of AMPA glutamate receptors
A drowning victim will likely experience a period of ________ until resuscitation begins
A) acute respiratory acidosis B) acute respiratory alkalosis C) chronic respiratory alkalosis D) metabolic acidosis E) metabolic alkalosis
Draw graphs showing the effects on action potentials in a postsynaptic cell of effective doses for each of the listed toxins. Assume that the cell is normally brought to threshold by the stimuli applied to its inputs, so that any abnormality is due to the toxin.
1. curare (prevents receptor from binding neurotransmitter) 2. botulinum toxin (prevents neurotransmitter release)
A) sensitization
A) nonassociative. B) sensitization. C) habituation. D) associative.