The Processes an Organism Uses to Maintain Normal Internal Conditions

The maintenance of an organism’s internal environment is called:

• compensating
• homeostasis
• balancing
• routine

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Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

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Why does pulse rate increase during exercise?

• Oxygen and carbon dioxide must be removed from the body ASAP

• Gas exchange must happen more quickly than when a person is at rest

• Oxygen must be moved to the lungs and carbon dioxide must be moved to cells more quickly

• Carbon dioxide must be moved to the kidneys to be excreted

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The term for maintaining internal temperature is: 

• Thermoregulation
• Thermometer
• Homeothermal
• Homeostasis

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Homeostasis in the human body is often maintained by a: 

• neutral feedback loop 
• solar feedback loop
• positive feedback loop
• negative feedback loop

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Which body system controls the body to maintain homeostasis?

• excretory

• nervous

• circulatory

• skeletal

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Which correctly identifies all steps involved in negative feedback?

• initiation event, stimulus, positive feedback, response, effector, control center, receptor

• termination event, stimulus, reply, effector, control center, and receptor

• initiation event, response, stimulus, effector, command center

• initiation event, stimulus, receptor, control center, effector and response

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NGSS.HS-LS1-3

What part of the negative feedback loop is what happens inside of the organism, as the result of the effector?

• Initiation event

• Response

• Receptor

• Effector

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Which part of the feedback loop is a body part that makes a change to bring the system back to homeostasis?

• Effector

• control center

• response

• receptor

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When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?

• Negative Feedback Loop

• Positive Feedback Loop

• Neutral Feedback Loop

• Linear Feedback Loop

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