How does the body respond to infections? Take the quiz.

CORRECT ANSWERS: 0

Hookworm. Leprosy. Mumps. Plague. Rabies. Tetanus. These are just a few of the multitude of infectious diseases that can attack humans. How do you fight them off? Take the quiz to see what you know about your invaluable immune system.

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Question 1 of 20

Which of the following is NOT considered a physical barrier to infection?

blood
stomach acid
tears
urine

... Physical barriers to infection include urine, stomach acid, tears, mucus, skin, mucus membranes and earwax.

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Question 2 of 20

When you get a fever in reaction to an infection, the temperature of your body has been reset by which part of your brain?

amygdala
brain stem
hippocampus
hypothalamus

... The hypothalamus regulates your body's temperature like a thermostat, raising the temperature when there is an infection.

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Question 3 of 20

The pattern of a person's temperature does not usually help diagnose the infection; however, a fever pattern is seen with _______.

cancer
lupus
malaria
pneumonia

... When a person has malaria, the fever commonly shows up every other day or every third day.

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Question 4 of 20

One kind of T cell (a type of white blood cell) is known as a ______ T cell.

deadly
destroyer
killer
slayer

... Killer T cells locate body cells that shelter viruses and eliminate those cells.

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Question 5 of 20

Adenoids, which are part of the immune system, usually begin to shrink around age ______.

two
five
10
15

... Adenoids help babies and young children fight infection. They are usually shrinking by age five and may be essentially nonfunctional by the teen years.

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Question 6 of 20

In developed countries, infections are NOT commonly spread through ______.

air
blood
food
sex

... In developed countries, infections are most commonly transmitted through air, blood, skin contact or sexual contact but not through food.

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Question 7 of 20

White blood cells recognize invading cells and usually leave your own body cells alone because of the _______.

clandestine cell structure
isolated goblet cells
Huxley's layer
major histocompatibility complex

... Like a sort of cellular name tag, the major histocompatibility complex is a system within every cell that identifies it as being part of your specific body. Therefore, it should not be attacked.

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Question 8 of 20

Inflammation is an immune response to address injury. Which of the following is your body's response to inflammation?

creating a barricade
removing dead and damaged tissue
repairing tissue
all of the above

... Inflammation instructs the body to create a barrier, attack intruders, eliminate dead or injured tissue and begin the mending process on surviving tissue.

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Question 9 of 20

Langerhans cells are located primarily in which part of the body?

pancreas
skin
spleen
thymus

... Langerhans cells are most commonly found in the skin, where they regulate immune responses.

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Question 10 of 20

The thymus is located in the _______.

abdomen
brain
chest
neck

... The thymus lies in the chest, between the heart and breast bone, and is especially important for an infant's immune system.

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Question 11 of 20

The spleen filters ______ to locate invading cells.

bile
blood
lymph
urine

... The spleen checks the blood for outside aggressors. It also searches for worn out red blood cells.

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Question 12 of 20

Antibodies are composed of ______.

calcium
lipids
plasma
protein

... Antibodies are proteins produced by white blood cells to fight against specific bacteria, viruses or contaminants.

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Question 13 of 20

Hormones ________.

help the immune system
interfere with the immune system
can either help or hinder the immune system
have no effect on the immune system

... Hormones can either help or hinder the immune system. Some hormones, such as estrogen, give a boost to the immune system. Others, such as steroids, slow down the body's immune system response.

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Question 14 of 20

Interferon allows cells to _______.

destroy foreign material
pass from one part of the immune system to another
signal each other
weaken the cell walls of viruses

... Interferon lets cell pass signals. If a cell senses interferon in other cells, it begins making proteins that inhibit replication of viruses.

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Question 15 of 20

Many white blood cells are different from other body cells because they _______.

cannot replicate on their own
have no cell membrane
have no nuclei
have very long lives

... Many white blood cells cannot multiply on their own, so they are made in the bone marrow.

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Question 16 of 20

Which of the following is non-living but can still cause infections?

bacterium
fungus
parasite
virus

... Viruses do not have enough components to be considered living cells. They do not have cell membranes nor can they reproduce without host cells.

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Question 17 of 20

Lymph nodes, which contain immune cells, are NOT found in the _________.

abdomen
armpits
feet

... While lymph nodes are found throughout the body -- such as in the abdomen, armpits, groin and neck -- they aren't found in the feet.

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Question 18 of 20

Most bacteria that cause infections live _________.

in the blood
in the space between cells
inside cells
inside cellular DNA

... Although a few kinds of bacteria must actually enter cells to survive, most live in the area between body cells.

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Question 19 of 20

Which of the following is caused by a malfunctioning immune system?

chicken pox
diverticulitis
juvenile-onset diabetes
muscular dystrophy

... In juvenile-onset diabetes, the immune system attacks insulin-producing cells in the pancreas. Other autoimmune diseases include lupus, rheumatoid arthritis and Graves' disease.

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Question 20 of 20

What is pus?

bacteria that is intensifying
dead blood cells
mucus
mutated cells

... Pus consists of dead neutrophils -- the most common white blood cells -- as well as other cellular waste.

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