In which of the following forms does Ca2+ exhibit profound effects on such things as neuromuscular excitability?
a. free, unbound diffusible Ca2+
b. intracellular Ca2+
c. calcium phosphate crystals impregnated in the organic matrix of bone
d. calcium bound to plasma proteins
e. insoluble Ca2+ salts
A
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The thickest myocardium is in the left ventricle.
Answer the following statement true (T) or false (F)
A bent nasal septum that slows or prevents sinus drainage is known clinically as a ________ septum
A) deviated B) crooked C) obstructive D) deviant E) restrictive
Sometimes, when it is difficult to initiate a knee-jerk reflex by tapping the patellar tendon, a patient will be asked to voluntarily make a fist. Then the reflex will be easily evoked. What does this illustrate about the relation between voluntary and
involuntary reflex movement? What will be an ideal response?
Why is it important for impulses from the atria to be delayed at the AV node before they pass into the ventricles?
What will be an ideal response?