What is the part of the eye that is clear and covers and protects the eye and can be easily scratched and cause trauma to the eye?
What will be an ideal response?
cornea
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List and explain two ways hormones affect their targets.
What will be an ideal response?
The first step in the visual transduction process that occurs in the retina is
a) activation of amacrine cells. b) absorption of scattered light by the pigmented epithelium. c) interruption of the dark current. d) absorption of light by photopigments. e) generation of action potentials in the optic nerve.
The sense of smell is able to stimulate vivid memories because the olfactory tract passes through the:
a. hypothalamus b. thalamus c. cerebellum d. brainstem
An investigator places an isolated neuron in a calcium-free medium. They give the neuron a suprathreshold stimulus and then perform an assay to test whether neurotransmitter is released into the medium. Which of the following outcomes would you predict?
a. No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release. b. No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential. c. Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold. d. We cannot predict the outcome without knowing whether the neuron was myelinated. e. None of these.