A sarcomere is defined as the distance from one _____ to the next adjacent ____ . (The same answer fills in both spaces.)
A. Z disc
B. I band
C. H zone
D. A band
E. M line
A
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The hormone that regulates water excretion by the kidneys
A) only increases water permeability in certain portions of the kidney tubules. B) decreases water permeability throughout the kidney tubules. C) increases water permeability throughout the kidney tubules. D) only decreases water permeability in certain portions of the kidney tubules.
Resistance to blood flow is _____ proportional to viscosity, _____ proportional to vessel length and _______ proportional to vessel radius
Fill in the blank(s) with correct word
In the process of continuous propagation, all of the following are true except
A) the action potential is triggered by graded depolarization of the initial segment. B) at threshold, sodium channels begin to open rapidly. C) local currents depolarize the region just adjacent to the active zone. D) depolarization of the axonal membrane only occurs at nodes. E) each step takes about one millisecond.
The ________ lead from the eyes to the optic chiasma.
A. optic radiations B. optic nerves C. optic tracts