AnswersTX-Biology B-CRUnit Test

Unit Test — Unit test Answers

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1
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Which of the following describes the epididymis?

A
a tube that transports sperm to the urethra
B
a vesicle that produces fluid and gives sperm nourishment and motility
C
a gland that contributes fluid to semen
D
a tube that stores and develops sperm cells from the testes
2
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The graph shows the changing levels of hormones during menstruation and ovulation. In general, what happens to the hormone levels between days 21 and 27, just prior to menstruation if the egg was not fertilized?

Question illustration
A
Hormone levels generally decrease.
B
Hormone levels generally rise.
C
Hormone levels remain the same.
D
Hormone levels go in two different directions.
3

Lice are small wingless insects that make their home in human hair and feed on very small amounts of blood from the scalp. They can be transferred from person to person and through the use of contaminated items such as brushes or pillows. Which type of disease is lice infestation?

A
communicable
B
noncommunicable
C
genetic
D
lifestyle
4

Asbestosis is a lung disease that is caused by inhaling asbestos, a mineral that was once used as insulation and fire retardant in building materials. Which best describes abestosis?

A
It disproves spontaneous generation.
B
It offers supporting evidence regarding miasma.
C
Its transmission cannot be studied using the germ theory of disease.
D
Its transmission can be studied using the germ theory of disease.
5

Leukopenia is a condition characterized by a decrease in white blood cells. What effect does leukopenia have on the body's ability to fight infection?

A
Leukopenia increases the body's ability to fight infection.
B
Leukopenia decreases the body's ability to fight infection.
C
Leukopenia has no effect on the body's ability to fight infection.
D
Leukopenia increases the body's ability to fight infection at certain times and decreases it at other times.
6

What would cause antibodies to attack the cells of the body?

A
The cells support bacterial growth.
B
The cells are worn out and need to be replaced.
C
The antibodies mistakenly identify the cells as foreign material.
D
The red blood cells are malfunctioning.
7

Which best describes the testes?

A
They produce hormones and sperm.
B
They are the male copulatory organ.
C
They give sperm nourishment and motility.
D
They are the pouch-like skin that protects the scrotum.
8

In the 1950s, the structure of DNA was discovered by using models and x-ray chromatography. Currently, science has used advanced technology to completely map out the genes in a human’s body. What would be the best advantage of using this information?

A
gene therapy to correct defective genes that cause diseases
B
gene therapy to remove bacteria from the soil
C
more communicable diseases
D
fewer communicable diseases
9

Which causes a drop in female hormone levels?

A
the onset of the menstrual flow
B
the release of an egg from the ovary
C
the thickening of the uterine wall
D
the failure of an egg to be fertilized
10

Which is an immune response?

A
The iris of the eye narrows when the eyes are exposed to bright light.
B
Langerhans cells transport harmful substances to white blood cells.
C
Muscles under the skin contract rapidly to adjust the body's internal temperature.
D
T cells signal B cells to adjust the pH of the blood.
11

What does the immune system protect the body against?

A
changes of the internal body temperature
B
changes in the temperature of environment
C
changes caused by harmful pathogens
D
changes in the pH of the blood
12

Lupus, a condition in which the body attacks its own cells, is an example of

A
an allergic disorder.
B
an immunodeficiency disorder.
C
a cancer of the immune system.
D
an autoimmune disorder.
13

What are the functions of the male reproductive system?

A
production of semen and urine
B
production of gametes and hormones
C
production of progesterone and estrogen
D
production of urine and hormones
14

Hormones perform important functions within the reproductive system. During puberty, secondary sex characteristics develop. Which hormone is responsible for the development of these characteristics in the female?

A
estrogen
B
progestin
C
progesterone
D
testosterone
15

In which structure of the female reproductive system are eggs produced?

A
cervix
B
fallopian tube
C
ovary
D
uterus
16

A sperm fertilized an egg. Which two structures will the fertilized egg contact?

A
ovary and fallopian tubes
B
fallopian tubes and uterus
C
uterus and cervix
D
cervix and ovary
17

How is the male reproductive system different from other body systems?

A
It is not necessary for an individual's survival.
B
It monitors other body systems, and adjusts if necessary.
C
It transports items from one system to another.
D
It is the only system that produces hormones in the male.
18

Red blood cells have _________ and generate energy ________.

A
mitochondria; anaerobically
B
no mitochondria; anaerobically
C
mitochondria; aerobically
D
no mitochondria; aerobically
E
None of the above
19

One function of the immune system is to attack the foreign cells to protect the body. In organ transplants, the body recognizes that the new organ is made of foreign cells. What kind of medicine would you give a patient to increase the chances of transplant success?

A
Medicine that makes the immune system less effective.
B
Medicine that makes the immune system more effective.
C
Medicine that allows the immune system to produce and secrete hormones.
D
Medicine that allows the immune system to regulate nerve responses.
20

Amalia has the flu, a communicable disease that causes a cough and a runny nose. Which best describes how she likely got it?

A
She does not exercise.
B
She has a poor diet.
C
She touched the doorknob in a classroom.
D
She inherited it from her parents.

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