Unit 4 Review!
Matching, Multiple Choice, and True or False!

1) What is the difference between a Morula and a Blastocyst?
a. A Morula is a hollow ball of cells that eventually becomes a Blastocyst, a solid ball of cells.
b. A Morula is a solid ball of cells that eventually becomes a Blastocyst, a hollow ball of cells.
c. A Blastocyst is a hollow ball of cells that eventually becomes a Morula, a solid ball of cells.
d. A Blastocyst is a solid ball of cells that eventually becomes a Morula, a hollow ball of cells.

2) Match the systems with the germ layers:
1. Mesoderm.....................................................a. Skin and nervous system
2. Endoderm......................................................b. Gut, liver, and lungs
3. Ectoderm.......................................................c. Skeleton, muscles heart and blood

3) What is the first organ system to develop in the baby?
a. Immune System
b. Skeletal System
c. Nervous System
d. Muscular System

4) The heart is the first organ to develop and work.
a. True
b. False

5) In what trimester of fetal development can the baby see light, hear sounds, and react to it?
a. First trimester
b. Second trimester
c. Third trimester

6) In what stage of childbirth is the baby born?
a. Stage 1: Dilation
b. Stage 2: Expulsion
c. Stage 3: Afterbirth

7) When does Oogenesis begin in females?
a. Menopause
b. Puberty
c. After birth
d. Before birth

8) Where is sperm produced?
a. In the urethra
b. In the epididymis
c. In the testes
d. In the prostate gland

9) What is the pathway of the sperm?
a. testes, epididymis, vas defrens, urethra
b. epididymis, testes, vas defrens, urethra
c. testes, epididymis, urethra, vas defrens
d. testes, urethra, epididymis, vas defrens

10) What do polar bodies do?
a. Release horomones that help regulate the menstrual cycle and early stages of pregnancy
b. Help the egg move from the ovaries and through the fallopian tubes
c. Help the sperm meet up with the egg for fertilization
d. Provide the eggs with nutrients and fluids

11) The egg is the smallest cell in the human body.
a. True
b. False

12) Meiosis produces:
a. Two unique daughter cells
b. Four identical daughter cells
c. Four unique daughter cells
d. Two identical daughter cells

13) What occurs in Anaphase 1?
a. Homologous chromosomes line up at the middle of the cell
b. Sister chromatids are pulled to opposite sides of the cell
c. Sister chromatids line up at the middle of the cell
d. Homologous chromosomes are pulled to opposite sides of the cell

14) A karyotype is a picture of chromosomes in a cell that can show any abnormalities.
a. True
b. False

15) What happens if nondisjunction occurs?
a. There are no homologous chromosomes
b. There is an extra homologous chromosome
c. The homologous chromosomes break
d. Homologous chromosomes fail to seperate


Answers
1. B
2. C, B, A
3. C
4. A
5. C
6. B
7. D
8. C
9. A
10. A
11. B (It is the largest cell in the body)
12. C
13. D
14. A
15. D