An increase in heart rate is accompanied by
a. an increase in L-type Ca2+ channel activity.
b. an increase in K+ flux through voltage-gated K+ channels.
c. an increase in the passive movement of Na+ into cells of the SA node.
d. an increase in the passive movement of K+ out of cells of the SA node.
e. a combined increase in passive movement of Na+ and K+ out of the cells of the SA node.
C
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Essential nutrients are nutrients a person must obtain from food because the body cannot manufacture them in sufficient amounts to meet its physiological needs
a. True b. False Indicate whether the statement is true or false
During development, the midgut artery appears to be markedly narrowed at its origin. Which of the following structures is derived from the midgut and may receive inadequate blood supply?
(A) Gallbladder (B) Stomach (C) Descending colon (D) Ascending colon (E) Rectum
Adding ________________________________________ to the diet reduces both diarrhea and constipation
Fill in the blank(s) with correct word
Which of the following conditions is caused by a parasite??
A) ?Ingrown nails B) ?Fungal infections C) ?Head lice D) ?Warts