How are most nutrients absorbed in the digestive tract eventually transported out of the digestive system?
A) via the hepatobiliary duct
B) through the aorta
C) through the hepatic portal vein
D) via pulmonary arteries
E) via the pyloric valve
Answer: C
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________ potentials are short-lived, local changes in membrane potential that can be either depolarized or hyperpolarized.
Fill in the blank(s) with the appropriate word(s).
________ are glial cells in the CNS that help form the blood-brain barrier.
Fill in the blank(s) with the appropriate word(s).
The major ionic change that initiates the rising phase of the autorhythmic cell action potential is __________.
A. potassium ion exit B. sodium ion entry C. calcium ion entry D. calcium ion exit
What is required for osmosis to occur?
A) pressure gradient B) solute pump C) aquaporins D) sodium-potassium pump E) vesicles