Question

1.

A typical fetus will be _____ times larger at 38 weeks than it was at 9 weeks.

	30
	10
	20
	40

2.

A typical labor last about:

	3 to 7 hours.
	5 to 9 hours.
	11 to 14 hours.
	8 to 12 hours.

3.

About _____ million sperm cells are released in a typical ejaculation.

	50 to 100
	400 to 800
	100 to 200
	200 to 400

4.

All organ systems except the sex organs are present, though not functional, at the beginning of the _____ phase of development.

	germinal
	zygote
	fetal
	embryonic

5.

Ashley contracted rubella while she was pregnant. Her unborn child is most likely to be affected if it is in the _____ of development.

	the fetal phase
	the embryonic phase
	the blastocyst phase
	the germinal phase

6.

At about four days after conception, the cell mass develops a hollow center and is called a:

	embryo
	zygote
	fetus
	blastocyst

7.

At the beginning of the fetal phase of development, the fetus is about:

	one inch long.
	half an inch long.
	two inches long.
	three inches long.

8.

Birth typically occurs _____ weeks after conception.

	40
	42
	38
	36

9.

Each organ system begins to form during the _____ phase of development.

	germinal
	zygote
	embryonic
	fetal

10.

The cardiovascular system is functioning by the end of week:

	4
	8
	6
	10

11.

The developing organism is particularly vulnerable during the _____ because this is when the distinct organ systems are being formed.

	the blastocyst phase
	the germinal phase
	the fetal phase
	the embryonic phase

12.

The embryonic phase of development lasts from about _____ after conception.

	weeks 5 through 11
	weeks 3 through 8
	weeks 1 through 7
	weeks 4 through 9

13.

The fetal phase is reached at _____ weeks after conception.

	9
	8
	10
	7

14.

The first two weeks after conception are referred to as the ______ phase of development.

	embryonic
	zygote
	fetal
	germinal

15.

The germinal phase ends when:

	the blastocyst attaches to the uterine wall.
	the blastocyst exits the fallopian tubes.
	the blastocyst is formed.
	the blastocyst consists of more than 4000 cells.

16.

The outer mass surrounding the embryo becomes:

	the digestive system
	the brain
	the spinal cord
	the placenta

17.

What phase of development gets its name from the Greek word for “swelling”?

	the fetal phase.
	the blastocyst phase.
	the embryonic phase.
	the germinal phase.

Answer 1

1. 20 : at 9 weeks the fetus is the size of a peanut but grows rapidly in size as the major structures develop gradually

2. 8 to 12 hours:8 hours is the general time needed for first time mothers

3. 200-400: typically humans ejaculate about 300 million sperm cells out of which only few make it

4. Fetal phase of development : is the last stage of development where the sex organs begin to grow. Bones and muscles are also formed in this phase which forms the last two years until birth

5. embryonic phase : this period occurs after the implantation and where all the major structures are developed. Thus it is an important phase where the expectant mother has to be fully healthy