A&P: Feedback Loops Quiz

Which of the following best defines a negative feedback mechanism in the human body?

• A process that amplifies changes away from a set point

• A process that counteracts changes to maintain stability

• A process that has no effect on homeostasis

• A process that only occurs during disease

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Which body system is primarily responsible for transporting oxygen and nutrients throughout the body?

• Digestive system

• Nervous system

• Circulatory system

• Endocrine system

What is the main function of the respiratory system?

• Breaking down food

• Exchanging gases between the body and the environment

• Filtering waste from the blood

• Producing hormones

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Which of the following is an example of a positive feedback loop in the human body?

• Regulation of blood glucose levels

• Blood clotting during injury

• Body temperature regulation

• Maintenance of blood pressure

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Which body system is responsible for producing hormones that regulate growth, metabolism, and reproduction?

• Muscular system

• Endocrine system

• Skeletal system

• Integumentary system

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What is homeostasis?

• The process of cell division

• The maintenance of a stable internal environment

• The breakdown of nutrients

• The transmission of nerve impulses

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Which of the following is an example of a negative feedback loop?

• Childbirth contractions

• Blood sugar regulation by insulin

• Platelet accumulation in clotting

• Milk production during breastfeeding

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Which body system is primarily responsible for defending the body against pathogens?

• Immune system

• Digestive system

• Respiratory system

• Skeletal system

Which of the following best describes the role of the nervous system in homeostasis?

• It produces digestive enzymes

• It transmits signals to coordinate body functions

• It stores minerals

• It filters blood

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A patient’s body temperature rises above normal. Describe how a negative feedback mechanism would restore homeostasis.

• The body would continue to increase temperature until it returns to normal

• The body would initiate processes such as sweating and vasodilation to lower the temperature

• The body would stop all metabolic processes

• The body would increase shivering to generate more heat

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