MS Life Science Apex Unit 9 Test Review

What is the main function of the circulatory system?

• To break down food into molecules of nutrients

• To protect the body from pathogens that can cause infection

• To carry nutrients to cells and wastes away from cells

• To collect wastes made by cells and remove them from the body

The picture shows an organ system in the human body. What do these organs do in the human body?

• They filter pathogens and dead cells out of lymph before it returns to the blood.

• They monitor and react to changes in the body and its environment.

• They release hormones that control the activities of cells and organs.

• They identify and destroy things that are foreign or harmful to the body.

Which statement describes two organ systems working together to deliver nutrients to cells?

• The blood absorbs the nutrients that the digestive system obtains from food.

• The molecules of important nutrients are made from food in the digestive system.

• The excretory system removes excess nutrients from blood as it makes urine.

• The respiratory system transfers oxygen removed from nutrients to the blood.

Which two statements describe organ systems working together to remove wastes from the body?

• The circulatory system carries oxygen-rich blood into muscles in the legs.

• The digestive system breaks down food into molecules that can move into the blood.

• The respiratory system exhales carbon dioxide that enters the lungs from blood vessels.

• The integumentary system gives off thermal energy that comes from blood vessels.

What happens to cause the tissue around a cut to become swollen, red, and painful?

• Fluid and white blood cells move into the tissue from nearby blood vessels.

• Chemical messengers released by the tissue cause nearby muscles to contract and pull on bones.

• Lymph nodes develop in the tissue and begin trapping pathogens.

• White blood cells burst and release wastes made by digesting pathogens.

These models represent molecules that play a role in the immune system. In which two ways do these molecules fight pathogens in the body?

• They bind to pathogens that enter the body.

• They carry pathogens out of the body.

• They recognize specific pathogens in the body.

• They eat pathogens that attack the body.

How does skin defend the body against pathogens?

• It destroys pathogens with digestive acids.

• It uses tiny hairs to trap pathogens.

• It blocks pathogens from getting inside the body.

• It produces white blood cells that attack pathogens.

What do white blood cells do for the body?

• They build new cells for damaged tissues.

• They produce molecules that recognize pathogens.

• They make hormones that prevent infections.

• They keep blood from flowing out of the body.

Which activity would most likely help keep a person's bones and muscles healthy?

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Which statement best describes how eating regular meals helps your body maintain homeostasis?

• Regular meals provide your body with a constant supply of energy.

• Regular meals stop your blood sugar level from getting too high.

• Regular meals prevent infectious disease.

• Regular meals increase your muscle strength and flexibility.