Which part of the hemoglobin molecule actually binds the oxygen molecule? Which part binds carbon dioxide?
A. globin chain; heme
B. globin chain; globin chain
C. heme; globin chain
D. cell membrane; cell wall
E. heme; heme
Answer: C
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During implantation, the inner cell mass develops into two flattened layers of cells called the ____
a. blastocyst b. amnion c. embryonic disk d. chorion e. placenta
The global pattern of air circulation begins at
a. the equator. b. 30 degrees north latitude. c. 30 degrees south latitude. d. 60 degrees north latitude. e. 60 degrees south latitude.
In which blood vessels is blood pressure the lowest?
A) arteries B) capillaries C) veins D) left ventricle
A structure covered by the anterior labia minora that contains many nerve endings and functions in sexual arousal in females is called the ________
A) clitoris B) uterus C) vagina D) cervix