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A. Multiple Choice: Write the letter of your answer on the space provided before each item . 1. The typical menstrual cycle takes days. a. 20 days b. 30 days C. 28 days d. 25 days 2. A female experiences body changes éven before the first menstruation called a. menstruation b. menarche c. menopausal d. ovulation 3. At puberty, this master gland starts a series of hormonal changes that make a woman capable of pregnancy. a. pituitary gland b. ovary c. adrenaline gland d. thalamus 4. This is a female sex hormone which is secreted as the follicle cells develop. a. estrogen b. progesterone c. testosterone d. egg cell 5. During ovulation, the egg is ready for fertilization within _ from its release. a. 24 hours b. 48 hours c. 72 hours d. 12 hours 6. This process is the releasing of the mature egg. a. ovulation b. ovarian cycle c. menstrual cycle d. uterine cycle 7. Blood and some accompanying endometrial tissues flow out of the vagina in a process called a. fertilization b. ovulation c. ejaculation d. menstruation 8. What causes breast enlargement during pregnancy? a. progesterone b. estrogen c. testosterone d. follicle-stimulating hormone 9. This is the process through which the level of a certain substance influences the level of another substance. a. negative feedback b. positive feedback . c. feedback mechanism d. menstrual cycle 10. This process shows the unity of the sperms' nucleus and the ovum's nucleus. a .feedback mechanism b. fertilization C. ovulation d. menstruation
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