The main factor affecting depth of focus is ________.
A. the size of the lens
B. the size of the pupil
C. the shape of the lens
D. accommodation
E. convergence
Answer: B
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What muscle allows mollusks to open and close their shells?
What will be an ideal response?
The resting membrane is ____ more permeable to potassium than to sodium
a. 2x b. 5x c. 10-15x d. 25-30x e. 100x
The chemical formation of ATP is coupled to a diffusion force in ________.
Fill in the blank(s) with the appropriate word(s).
You are dissecting a species of amphibian that has just been discovered in the rainforest. You find a blood vessel where the blood travels at a low pressure and velocity. If the frog is in an upright position, blood flow through this vessel would also be against gravity. Anatomically, what do you expect of this blood vessel?
A. Valves that allow only one-way flow of blood B. Large wall to lumen ratio C. A thick muscular wall D. A high degree of compliance E. All of the answers are correct