After eating a large meal of pasta, an individual's blood sugar levels are elevated. In response to this, the pancreas secretes a hormone called insulin, which acts to lower blood sugar levels
Once the blood sugar levels drop to the normal level, the pancreas stops secreting insulin. This is an example of
A) a positive feedback loop.
B) acid-base imbalance.
C) a negative feedback loop.
D) reactions between carbon monoxide and acids.
E) energy being made into proteins.
C
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Prokaryotic cell movement is attributed to:
A. pili. B. flagella. C. ribosomes. D. capsules. E. cytoskeleton proteins.
Bacterial peptidoglycan is not a good target for antibiotics because it is present in human cells as well, leading to host damage.
Answer the following statement true (T) or false (F)
The coronary arteries supply blood to cardiac tissue. Which chamber of the heart requires the greatest amount of blood supply to keep it working?
A) right ventricle B) left ventricle C) left atrium D) right atrium
An individual transport vesicle________
(a) contains only one type of protein in its lumen. (b) will fuse with only one type of membrane. (c) is endocytic if it is traveling toward the plasma membrane. (d) is enclosed by a membrane with the same lipid and protein composition as the membrane of the donor organelle.