____-type calcium channels are present only in the pacemaker cells of the heart
Indicate whether the statement is true or false
T
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At the splenic flexure, the colon becomes the
A) ascending colon. B) transverse colon. C) descending colon. D) sigmoid colon. E) rectum.
Why do inhaled foreign objects lodge more frequently in the right main bronchus than the left?
A. The right main bronchus is longer than the left. B. The right main bronchus is more horizontal than the left. C. The right main bronchus angles more sharply from the trachea. D. Objects tend to be drawn toward the left main bronchus because air pressure is slightly lower in the left lung. E. The right main bronchus is wider and more vertical than the left.
A very strong stimulus produces a larger action potential.
Answer the following statement true (T) or false (F)
Athletes who train at high altitudes increase their red blood cell count, which increases their oxygen supply during exercise. Increased oxygen supply results in ________
A) longer aerobic respiration B) increased glycolysis C) longer anaerobic fermentation D) increased use of myokinase E) reduced ATP consumption