Feedback and Homeostasis

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

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

• compensating
• homeostasis
• balancing
• routine

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NGSS.HS-LS1-3

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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NGSS.HS-LS1-3

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

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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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NGSS.HS-LS1-3

Which best describes the stimulus-response model?

• Stimulus - receptor - effector - control center - response

• Stimulus - receptor - control centre - effector - response

• Stimulus - effector - control center - receptor - response

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NGSS.HS-LS1-3

When blood glucose is high, the negative feedback mechanism is to produce which hormone?

• Glucagon

• Glycogen

• Insulin

• Basal Insulin

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NGSS.HS-LS1-3

Which is an example of the negative feedback mechanism?

• Blood sugar levels being controlled by negative feedback loop (food being consumed and digested causes blood level glucose to rise)
• Temperature
• Controlling the amount of water lost through the excretory system
• Osmoregulation (regulating amount of water reabsorbed from glomerular filtrate in kidney tubes, etc.)

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NGSS.HS-LS1-3

________________ is used to maintain homeostasis and achieve set point within a system

• Osmosis
• Negative feedback mechanisms
• Benefit

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Positive feedback mechanisms is______

• Used for maintenance of homeostasis and to achieve a set point in a system
• Animals not needing to rely on external sources and having the ability to live under environments outside of normal ranges
• The tendency toward a relatively stable equilibrium between interdependent elements
• Characterized by the ability to maintain direction of stimulus and can accelerate its effect

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