List the four mechanisms involved in the regulation of aldosterone secretion.
What will be an ideal response?
The four mechanisms are: (1) the renin-angiotensin mechanism, (2) plasma concentration of sodium and potassium ions, (3) control exerted by ACTH, and (4) plasma concentration of atrial natriuretic peptide.
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List these events in the correct order for CSF flow in the CNS
a: CSF flows into the arachnoid villi b: CSF enters the blood c: CSF flows through the cerebral aqueduct to the 4th ventricle d: CSF flows into the subarachnoid space e: CSF is produced by the choroid plexus A. a, b, c, e, d B. e, a, b, c, d C. c, d, a, e, b D. e, c, d, a, b E. e, d, a, b, c
When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron,
A. hyperpolarization occurs. B. temporal summation occurs. C. the direction of the action potential is reversed. D. spatial summation occurs. E. threshold is never reached.
This figure shows an intestinal villus. What specific layer does number 4 indicate?
A. Circular layer of muscularis B. Longitudinal layer of muscularis C. Lamina propria D. Basement membrane E. Muscularis mucosae
Adipocytes produce a peptide hormone called ________ that acts on the hypothalamus
A) leptin B) grehlin C) lipase D) glucagon E) adipocin