Describe the stimuli that produce osmometric thirst, and cite evidence indicating the location of osmoreceptors in the brain.
What will be an ideal response?
Cells must maintain a constant volume within the cell. Changes in solute concentration outside the cell will produce movements of water through the cell membrane. A decrease in solutes outside the cell will result in water moving into the cell, whereas an increase in solutes will draw water from the cell and lead to cell shrinkage. The latter will reverse if water is lost through evaporation or if the organism consumes a salty meal. Osmoreceptors are located in the brain; injection of hypertonic saline into the tissue just anterior to the third ventricle (AV3V) will induce drinking.
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Commitment proceedings are legal proceedings that may result in the finding of
a. psychosis. b. neurosis. c. insanity. d. psychopathology.
Sensory neuron is to motor neuron as
a. afferent neuron is to efferent neuron. c. glial cell is to interneuron. b. efferent neuron is to afferent neuron. d. interneuron is to glial cell.
__________ is a defensive act in which an organism remains motionless
a. Freezing b. Stopping c. Halting d. Chaining