The ________ is an embryonic membrane that serves as the origin of the first blood and germ cells
A) placenta B) allantois C) amnion D) yolk sac E) chorion
D
Anatomy & Physiology
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Sperm cannot fertilize an egg until what has occurred?
A. Their plasma membrane is toughened by cholesterol. B. They undergo acromegaly. C. They lose their midpiece. D. They are in the vagina for 72 hours. E. They undergo capacitation.
Anatomy & Physiology
Unlike men, women lack a refractory period and may experience successive orgasms
Indicate whether the statement is true or false
Anatomy & Physiology
Why do males typically have lower voices than do females?
What will be an ideal response?
Anatomy & Physiology
All of the following blood diseases are caused by pathogens except
A) malaria. B) bacteremia. C) viremia. D) hemophilia. E) septicemia.
Anatomy & Physiology