Long-distance runners like to train at high altitudes because the lack of oxygen there stimulates the:
A) body to produce more lung tissue.
B) bone marrow to make more erythrocytes.
C) muscles to contract aerobically.
D) muscles to contract more strongly.
E) capillaries to diffuse oxygen more readily.
Correct Answer:
Verified
Q30: Red blood cells make up _% of
Q31: Erythrocytes are produced in the:
A)bone marrow.
B)liver.
C)spleen.
D)heart.
Q32: Erythropoietin:
A)is produced by the pancreas.
B)is released in
Q33: In a random screening of athletes at
Q34: Females need more dietary iron than males
Q36: Plasma is primarily:
A)protein.
B)salt.
C)cells.
D)gases.
E)water.
Q37: The human heart contains cells that do
Q38: What is the cardiac cycle?
A)the alternating relaxation
Q39: Some athletes use "blood doping," in which
Q40: How many molecules of oxygen can bind
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