The muscle under voluntary control that guards the exit of the rectum is the ________
What will be an ideal response?
external anal sphincter
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An abnormally high level of which of the following will result in goiter?
A) TRH B) either thyroxine or TRH C) TSH D) either TRH or TSH E) thyroxine
Answer the following statements true (T) or false (F)
1. Seminal fluid is slightly acidic to protect the sperm from the alkaline condition of the female reproductive tract. 2. The penis contains two separate columns of erectile tissue: one corpus spongiosum and one corpus cavernosa. 3. The scrotum contains the testes, epididymis, the lower part of the ductus deferens, and the beginning of the spermatic cords. 4. The female gonads are the ovaries. 5. In the female, the gonads produce ova.
The oxygen-binding protein found in muscle cells is ________
A) hemoglobin B) immunoglobin C) ATP D) myoglobin
A single-celled eukaryotic organism:
A) Has a limited number of biomolecular machines. B) Must find food, shelter, a mate and reproduce C )Escape from predators D) None of the above E) a, b, c above.