Describe the role of the hypothalamus in regulation of food intake
What will be an ideal response
The hypothalamus contains the neurons of the feeding center that stimulate eating and of the satiety center that signal fullness. Two nuclei in the hypothalamus that help regulate food intake are the arcuate and paraventricular nuclei. The hormone leptin, released by adipocytes, inhibits release of neuropeptide Y from the arcuate nucleus and thereby decreases food intake. Melanocortin also decreases food intake. It is thought that changes in blood chemistry (in terms of nutrients and hormone balance), as well as distention of the gastrointestinal tract, initiate appropriate hypothalamic activity.
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The ____________________ fibers of the autonomic nerve pathway are located in the central nervous system
Fill in the blank(s) with correct word
Synaptic vesicles containing neurotransmitters are released by ________ when the action potential arrives
A) endocytosis B) apoptosis C) exocytosis D) hydrolysis E) sodium
A threshold stimulus applied to an excitable membrane is one that is just sufficient to:
A. trigger an excitatory postsynaptic potential. B. cause a change in membrane potential. C. trigger an action potential. D. be conducted to the axon hillock. E. depolarize a dendrite.
Cells contain pairs of chromosomes. since they are the same size and shape and also code for the same information, each pair of chromosomes is called which of the following?
a) diploid chromosomes b) sex chromosomes c) autosomes d) homologous chromosomes