Which of the following structures secrets hormone renin?
a. Peritubular capillaries
b. Glomerular capillaries
c. Nephronic tubules
d. Juxtaglomerular apparatus
e. Bowman's capsule
Ans: d. Juxtaglomerular apparatus
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The term secretion refers to
A) the manufacture and assembly of a material. B) synthesis of a protein for export from the cell. C) the process by which a cell releases a substance into the extracellular space for a particular use. D) storage of a material, until it is time for it to leave the cell. E) None of the answers describe secretion.
In general, a small, thin person has a higher metabolic rate than a large, heavy person.
Answer the following statement true (T) or false (F)
How do cardiac muscle fibers differ from the muscle fibers of the arms and legs?
A. Longer muscle fibers than the limbs B. Non-striated fibers rather than striated fibers C. Poorer supply of blood than the limbs D. Routine involuntary movement
The myelination of central and peripheral axons occurs rapidly through the first few years of life. How can this developmental process explain the improved motor abilities of infants and toddlers?