A person is exposed to a drug that prevents vesicles from forming in neurons. Predict the effect this will have on nerve function.
A. Neurons will be hyper-excitable.
B. Voltage-gated potassium channels will be blocked, slowing depolarization and slowing nerve impulses.
C. Neurotransmitters won't be released into the synapse via exocytosis.
D. Action potentials will not be carried through the axon.
Answer: C
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Match the following systems to their functions:
A) Lymphatic B) Cardiovascular C) Immune D) Endocrine 1) Controls the body with chemical molecules called hormones. 2) Delivers oxygen and nutrients to the tissues. 3) Produces antibodies that neutralize foreign substances. 4) Removes and filters excess fluid from tissues.
The proper buffer pair ratio is:
a. 20 times more sodium bicarbonate than carbonic acid b. 20 times more carbonic acid than sodium bicarbonate c. 10 times more sodium bicarbonate than carbonic acid d. 10 times more carbonic acid than sodium bicarbonate
Insulin
a. facilitates the entry of glucose into brain tissue b. promotes glucose output by the liver c. lowers blood glucose levels d. does both a and c e. does all of the above
___ lines body cavities, covers body surface, and forms the lining of many organs.
A) Interstitial tissue. B) Muscle tissue. C) Adipose tissue. D) Epithelial tissue. E) Nervous tissue.