The second half of the pacemaker potential is brought about through the opening of ____-type ____ channels
Fill in the blank(s) with correct word
T, Ca2+
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The purpose of residual air in the lungs is to _____.?
A) ?prevent the lungs from collapsing B) ?prevent the temporary stoppage of breathing C) ?allow the continuous exchange of gases between breaths
Match the type of brain wave with its appropriate description.A. Usually occur in children or in adults experiencing frustrationB. Observed in a person who is awake, quiet, and resting, with eyes closedC. Occur in deep sleep, infancy, and patients with brain disordersD. Occur during intense mental activityAlpha waves
Fill in the blank(s) with the appropriate word(s).
Near the level of vertebra L4, the abdominal aorta branches to form the
A) common carotid arteries. B) common iliac arteries. C) femoral arteries. D) popliteal arteries. E) tibial arteries.
Normal metabolism produces enough heat to kill a person in less than 5 hours if the heat-loss mechanisms are completely shut down
a. True b. False Indicate whether the statement is true or false