21. It is the main control system of the body.
A. brain
B. heart
C. lungs
D. spinal cord
22. It happens when there is balance and harmony among the organ systems.
A. Disease
B. Disorder
C. Epistasis
D. Homeostasis
23. Which of the following serves as the passageway for both urine and male reproductive fluid called seme
A. Vas Deferens B. Urethra
C. Testis
D. Epididymis
24. The shedding of the lining of the uterus along with some blood once a month. Also called a monthly peri
A. Fertilization
B. Menstruation
C. Gestation
D. Reproduction
25. Also known as the nerve cell, it carries impulses to the nervous system,
A. impulse
B. neuron
C. receptor
D. sensor
26. Which of the following is the male organ that produces sperms?
A Penis
B. Scrotum
C. Testis
D. Urethra
27. How many sperm cell/s is/are needed to fertilize an egg?
A one
B. hundreds
C. thousands
D. millions
28. A sac shaped like an upside-down pear with a thick lining and muscles in the pelvic area where a fertilized
"gote comes to grow into a baby. Also called the womb.
B. Cervix
C. Uterus
D. Fallopian Tube
A. Vagina
29. Which female hormone control the development of the endometrium during the menstrual cycle a
tenance of uterus during pregnancy?
C. progesterone D testosterone
B. FSH and LH
A. estrogen
30. How long is an average menstrual cycle?
C. 28 days
D. 31 days
B. 14 days
7 days​