Why were so many world records set at the 1968 Olympic Games in Mexico City?
A. higher altitude reduced VO2max
B. higher altitude reduced drag force
C. both A and B
D. none of the above
B. higher altitude reduced drag force
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Which is TRUE about neuronal membrane electrical and concentration gradients at the peak of the action potential?
A. The concentration gradient for Na+ is in a direction that would tend to move it out of the cell. B. The concentration gradient for K+ greatly increases compared to at rest. C. The concentration gradient for K+ is in a direction that would tend to move it into the cell. D. The electrical gradient for Na+ is in a direction that would tend to move it into the cell. E. The electrical gradient is in a direction that would tend to move K+ out of the cell.
A nurse is caring for a patient who exhibits the following symptoms:
(1) inability to maintain balance while walking (2) normal intelligence (3) can initiate voluntary movements although they are somewhat uncoordinated. (4) decreased tone in the skeletal muscles The patient is probably suffering from a condition that affected the A. midbrain. B. cerebellum. C. basal ganglia. D. cerebral cortex. E. brainstem.
The ________ are a series of irregular muscular folds formed on the internal surface of the ventricles.
A) trabeculae carneae B) papillary muscles C) chordae tendineae D) moderator bands E) pectinate muscles
Plasma cells are concentrated in which portion of the lymph node?
A. Cortex B. Sinuses C. Medulla D. Capsule