A. Write the letter of the correct answer

1. What is the external sex organ of males that has columns of erectile tissue filled with blood?

A. Epididymis
B. penis
C. scrotum
D. testicle

2. Where is sperm made?

A. Within the testicles.
B. In a special gland at the base of the penis
C. Inside a specialized series of tubes located within the pelvis.
D. In the coiled tubes that rest on the backside of each testicle.

3. Why are the testicles kept outside of the body?

A. The testicles cushion the penis and stop it from hanging too low.
B. The cooler temperature is vital in the manufacture of sperm.
C. The hotter temperature is necessary for the production of spermatozoa.
D. Earlier in human evolution, visible testicles helped males to attract females.

4. What is the most important male sex
hormone?
A. Estrogen
B. Progesterone
C. Sperms
D. Testosterone

5. Which structures control the production of male sex hormones?

A. The testicles, and the hypothalamus.
B. The testicles, adrenal glands, and the brain stem.
C. The testicles, spinal cord, and the cerebral cortex.
D. The testicles, the pituitary gland, and the hypothalamus.



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