The "iodine pump" refers to the
a. mechanism whereby target cells extract iodine-containing thyroid hormone from the blood.
b. active transport mechanism that concentrates iodine in the thyroid.
c. mechanism whereby T3 and T4 are released from thyroglobulin and pumped into the circulation.
d. protein binding process whereby T3 and T4 are pumped throughout the body bound to plasma proteins.
e. mechanism whereby ingested iodine is absorbed by the small intestine.
B
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a. plasma protein b. red blood cells c. HDL d. LDL e. VLDL
In this figure showing an anterior view of the heart, the left atrium is noted by number
A. 1. B. 2. C. 3. D. 4. E. 5.
By 72 hours after fertilization, the egg has divided into more than 160 cells and is called the morula
Indicate whether the statement is true or false
Melatonin is secreted by the ____ to regulate the sleep/wake cycle.
Fill in the blank(s) with the appropriate word(s).