Changes in the radius of _____ has the most impact on resistance to blood flow, because radius can be changed quickly and precisely.
A. Capillaries
B. Arteries
C. Arterioles
D. Venules
Answer: C. Arterioles
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The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole
Indicate whether the statement is true or false
If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?
A) The inside of the membrane will become more positive. B) The inside of the membrane will become more negative. C) There will be almost no effect on transmembrane potential. D) The membrane will become depolarized. E) The outside of the membrane will become more positive.
An embryo with a genital tubercle, urethral folds, and urethral groove must be
A) seven weeks old. B) nine weeks old. C) under seven weeks old. D) unable to determine the age.
If a neurotransmitter hyperpolarizes a cell membrane and an action potential is
less likely, the change is called ______ ______ ______. Fill in the blank(s) with correct word