MCAT Biology Question 21: Answer and Explanation

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Question: 21

6. Upon ovulation, the oocyte is released into the:

  • A. fallopian tube.
  • B. follicle.
  • C. abdominal cavity.
  • D. uterus.

Correct Answer: C

Explanation:

This subtle point about ovulation eludes most students and remains hard to believe until the organs are examined in anatomy class in medical school. The ruptured ovarian follicle releases an oocyte into the abdominal cavity, close to the entrance of the fallopian tube. With the aid of beating cilia, the oocyte is drawn into the fallopian tube, through which it travels until it reaches the uterus. If it is fertilized in the fallopian tube, it will implant in the uterine wall. If fertilization does not occur, it will be expelled along with the uterine lining during menstruation.

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