AnswersFL-2000310-Biology 1 BUnit Test

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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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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
3

Charles is an engineer who is evaluating a prototype of an artificial heart. The prototype beats in a synchronized fashion, is hollow, and has tubes attached to it. It can be powered by electrical signals from the brain when it is interfaced with the appropriate nerves. What important feature should Charles notice the prototype is missing?

A
blood vessels to transport blood
B
a structure that would divide the hollow heart into chambers to separate oxygenated blood from deoxygenated blood
C
a blood filtering mechanism to separate oxygenated blood from deoxygenated blood
D
a structure to pump blood through the valves
4

During a third-trimester ultrasound, what would a doctor expect to observe in a fetus?

A
initial development of organs
B
response to noise and light
C
presence of a tail-like structure
D
the first heartbeat
5

Which terms best complete the chart about characteristics of human development between fertilization and birth?Stages of Human GestationFirst trimesterSecond trimesterThird trimester- Embryo develops- Organs begin to develop- (1)- Starts swallowing- Fat begins to develop- (2)- All organs are developed- Can hear and see- (3)

A
(1) Facial features form(2) Heartbeat can be heard(3) Nerve cells develop rapidly
B
(1) Heartbeat can be heard(2) Nerve cells develop rapidly(3) Facial features form
C
(1) Nerve cells develop rapidly(2) Facial features form(3) Heartbeat can be heard
D
(1) Facial features form(2) Nerve cells develop rapidly(3) Heartbeat can be heard
6

Which best describes the role of immunosuppressants in transplant surgeries?

A
to increase antibody production to fight off more pathogens
B
to suppress the immune system to allow pathogens to build immunity
C
to decrease antibody production to reduce the attacks on the new organ
D
to allow for recognition of antigens to determine compatibility
7

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.
8

Which type of medication treats a sprained ankle that exhibits pain, redness, and heat?

A
antihistamine
B
anti-inflammatory
C
antibiotic
D
antiparasitic
9

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
10

Consider the diagram of an internal feedback mechanism that the body uses to help maintain homeostasis.What is the role of the central nervous system in this model?

Question illustration
A
coordinator
B
effector
C
response
D
stimuli
11

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.
12

A student makes the analogy that the cardiovascular system is like a highway. Why is this a good analogy?

A
Blood is made of many different kinds of cells.
B
The heart pumps blood through the veins.
C
The heart is centralized in the body.
D
Blood transports materials to and from different parts of the body.
13

Meningitis is a disease that is characterized by swelling of the meninges that puts pressure on the brain. Which is least likely to be a symptom of this disease?

A
severe headache
B
swollen ankles
C
sensitivity to light
D
confusion
14

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.
15

Jacob recently suffered a serious head injury in a car accident. He now has trouble remembering his life before the injury. What part of Jacob's brain may have been injured in the accident?

A
hypothalamus
B
cerebellum
C
brain stem
D
hippocampus
16

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
17

Barry was on an antibiotic, but after he took all of it, he had a rash and the doctor prescribed him an antihistamine. Which most likely describes what happened to Barry?

A
He had a viral infection, but then developed an allergy to the antibiotic.
B
He had a parasite infection, but then it developed into a bacterial infection.
C
He had a fungal infection, but then it developed into a viral infection.
D
He had a bacterial infection, but then developed an allergy to the antibiotic.
18

Fred is studying his notes from anatomy class. One list in his notes describes features of a CNS structure. anterior horns and posterior hornsgray matter inside, white matter outsidehippocampuscentral canalFred thinks this list contains an error. Which best describes the error?

A
Most items are features in the brain, but the gray and white matter locations correspond to the spinal cord.
B
Most items are features in the brain, but the horns are in the spinal cord.
C
Most items are features in the spinal cord, but the central canal is in the brain.
D
Most items are features in the spinal cord, but the hippocampus is in the brain.
19

Doctors do not administer vaccinations to people who are too sick. Which best explains why?

A
The weakened or dead form of the pathogen may be attacked by the person's immune system.
B
The weakened or dead form of the pathogen may have a fatal effect when it is combined with medication that the sick people are taking.
C
The digestive systems of sick people may be negatively affected by the weakened or dead pathogen.
D
The white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.
20

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

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