Which of the following accounts for the heart sounds "lubb-dubb"?
A) closing of the semilunar and atrioventricular valves, respectively
B) opening of the semilunar and atrioventricular valves, respectively
C) closing of the atrioventricular and semilunar valves, respectively
D) opening of the atrioventricular and semilunar valves, respectively
C
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Functions of the urinary system include all of the following except
A) regulation of blood volume and blood pressure. B) regulation of plasma concentration of certain ions. C) helping to stabilize blood pH. D) conservation of valuable nutrients. E) storage of fat-soluble vitamins.
Straight tubules originate at the seminiferous tubules and form a maze of passageways called the
A) afferent ducts. B) efferent ducts. C) ductus deferens. D) epididymis. E) rete testis
Describe the structure of a spermatoz
What will be an ideal response?
The broad, suspensory, and ovarian ligaments hold an ovary in position
Indicate whether the statement is true or false