Several regions of the brainstem mediate autonomic responses. Which of the following is not mediated by these areas?
A) salivation
B) defecation
C) pupillary constriction
D) blood pressure
Answer: B) defecation
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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.
Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is ________ mL/beat, and his HR is ________ bpm.
A. 30; 80 B. 150; 16 C. 80; 30 D. 40; 60 E. 16; 150
A lumbar puncture may be done to determine the effectiveness of the blood-brain barrier.?
Indicate whether the statement is true or false
Developmentally, the most significant growth in the skull occurs
A. between the ages of 20 and 25. B. between the ages of 5 and 10. C. before age 5. D. between the ages of 15 and 20. E. between the ages of 10 and 15.