If you applied a toxin that blocked non-voltage-gated potassium channels (i.e., the potassium "leak channels") in a resting neuron, it would cause the membrane potential to be

A. less negative.
B. more negative.
C. No change would be observed.


A. less negative.

Biology & Microbiology

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The invariant amino acids in each peptide motif bound by MHC proteins are called

A) anchor residues. B) MHC peptides. C) antigen-binding immunoglobulins. D) TCR peptides.

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The process that destroys or removes all microorganisms and microbial forms, including bacterial endospores, on inanimate objects is ________.

A. degermation B. disinfection C. antisepsis D. sanitization E. sterilization

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The major divisions of the peripheral nervous system are the ____.

A. somatic and autonomic systems B. sympathetic and parasympathetic systems C. peripheral and central systems D. afferent and autonomic systems E. cranial and skeletal nerves

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In the Arabidopsis cdka;1 mutant the central cell of the female gametophyte is not fertilized.  What structure will not form in these mutant plants?

A. endosperm B. pollen tube C. synergids D. egg cell

Biology & Microbiology