19). During an action potential, repolarization occurs as a result of A. potassi

Question

19). During an action potential, repolarization occurs as a result of

A. potassium ions diffusing to the outside of the cell membrane.

B. potassium ions diffusing to the inside of the cell membrane.

C. sodium ions diffusing to the outside of the cell membrane.

D. sodium ions diffusing to the inside of the cell membrane.

20). In the case of a subdural hematoma resulting from a blow to the head, blood accumulates between the

A. dura mater and the skull.

B. dura mater and arachnoid mater.

C. pia mater and brain.

D. arachnoid mater and brain.

21). The pressure of cerebrospinal fluid is usually measured by introducing a hollow needle into the subarachnoid space between

A. cervical vertebrae.

B. thoracic vertebrae.

C. lumbar vertebrae.

D. none of the choice are correct.

22). An infant's responses to stimuli are coarse and undifferentiated because nerve fibers

A. have not yet appeared.

B. are incapable of carrying impulses.

C. have not yet developed connections to the brain.

D. are not completely myelinated.

Explanation / Answer

Sorry, didnt see the rest of the questions.. 20. B (subdural = below dura matter) 21. C (Usually done with a Lumbar Puncture) 22. D (incomplete myelination)

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