Which of the following has the highest rate of energy expenditure?
a. sexual intercourse
b. bicycling on a level surface
c. swimming
d. jogging
e. walking up stairs
E
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When a pacemaker potential in the SA node reaches threshold,
A. many voltage-gated Ca2+ channels open. B. permeability of the cell does not change. C. voltage-gated Ca2+ channels close. D. the permeability to K+ increases. E. resting membrane potential has been restored.
The pectineus muscle is located ______ and performs _____ of the hip joint.
Fill in the blank(s) with the appropriate word(s).
An anatomical term that means the same as "ventral" is
A) posterior. B) inferior. C) abdominal. D) anterior. E) superior.
________ yield about 4 kcal/g when completely oxidized, whereas ________ yield about 9 kcal/g
A) Proteins and carbohydrates; fats B) Proteins; fats and carbohydrates C) Carbohydrates and fats; proteins D) Carbohydrates; fats and proteins E) Fats; carbohydrates and proteins