What part of the eye contains the photoreceptors?
What will be an ideal response?What will be an ideal response?
retina
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Cytotoxic T-lymphocytes that have killed a foreign cell may transform into
A. memory B-lymphocytes. B. natural killer cells. C. plasma cells. D. helper T-lymphocytes. E. None of the choices is correct.
Accumulation of Ca2+ in the synaptic knob is called ________, and probably plays an important role in ________
A) neural coding; short-term memory B) postsynaptic potential; long-term memory C) neural coding; immediate memory D) long-term potentiation; long-term memory E) synaptic facilitation; short-term memory
Consider an atom with four electrons in its outer shell. If that atom is covalently bound to three other atoms within a molecule, then it is
A. in single bonds with all three atoms. B. in double bonds with all three atoms. C. in a triple bond with one atom and in single bonds with two atoms. D. in a double bond with one atom and in single bonds with two atoms. E. in a single bond with one atom and in double bonds with two atoms.
Gustatory receptors are sensitive to dissolved chemicals but insensitive to light. This is due to
A) receptor specificity. B) accessory cells. C) the fact that they are interoceptors. D) receptor potentials. E) both accessory cells and the fact that they are interoceptors.