The ejection fraction for an individual whose stroke volume is 45 ml of blood would be ________. This would ________ meet the body's demand for blood flow.
A. 10%; inadequately
B. 60%; adequately
C. 40%; inadequately
D. 75%; adequately
Answer: C
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While working in a lab without protective glasses, a researcher accidentally sprays themselves in the eyes with a nerve agent that blocks contraction in smooth muscles. Choose the statement that correctly reflects how the eyes will be affected.
A. The only effect is that the iris won't be reactive to light. B. The only effect is that the ciliary body won't be able to adjust the lens. C. Neither the ciliary body nor the iris will be able to adjust or react. D. Neither the ciliary body nor the iris will be able to adjust or react. The extrinsic eye muscles won't be able to move the eye, either.
During the embryonic developmental stage, skeletal muscle fibers are derived from:
a. fibroblasts b. lymphoblasts c. connective tissue d. myoblasts e. microfilaments
What type of nerve cells line the roof of the nasal cavity?
A) bipolar B) multipolar C) unipolar D) astrocytes
Deficiency of vitamin ________ causes osteomalacia.
A. C B. D C. A D. E