Reproduction - Human Growth

1. When a fertilized egg divides and forms a ball of cells, it is known as

A) an embryo
B) a nucleus
C) an implant
D) a fetus

2. Where does implantation occur and the zygote develop

A) in the fallopian tube
B) in the ovary
C) in the uterus
D) in the vagina

3. The developing embryo is fed by its mother’s blood through an organ called the

A) vagina
B) placenta
C) uterus
D) amnion

4. What cells begin to form early on in the developing embryo

A) eye cells
B) ear cells
C) lung cells
D) blood cells

5. The developing embryo is connected to the placenta by

A) the spinal cord
B) the umbilical cord
C) the developing nerves
D) the amniotic fluid

6. After week 9 or 10 of pregnancy, the developing human acquires features and is then referred to as

A) a fetus
B) a zygote
C) a newborn
D) an embryo

7. A mother goes into labor, and a fetus is ready to be born after approximately how many weeks?

A) 25
B) 48
C) 40
D) 17

8. A child is considered an infant until it reaches what age?

A) 3 years
B) 1 year
C) 5 years
D) 2 years

9. During puberty, an adolescent’s body goes through what change?

A) There is loss of flexibility.
B) Permanent teeth appear.
C) Eyesight deteriorates.
D) The reproductive system matures.

10. Ordinarily, how many sperm fertilize a female’s egg?

A) six to ten
B) one
C) a few hundred
D) several million

11. Which of the following is a characteristic of the placenta?

A) It becomes an organ in the developing embryo.
B) It’s an exchange organ between mother and embryo.
C) It contracts to help the mother give birth.
D) It contains very few blood vessels.

12. The mother’s muscle contractions that help a baby to be born are called

A) labor
B) full-term
C) the placenta
D) the uterus

13. Your navel is the place on your body that was once attached to

A) the amnion
B) a fallopian tube
C) the umbilical cord
D) the uterus

14. Which of the following is a characteristic of infancy?

A) You need little sleep
B) You begin to run
C) Baby teeth appear
D) You begin to read

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Main Idea
Human body systems
unit 5 week 3

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