Homeostasis Temperature Regulation

What is the evaporation of a liquid to cool the body?

• Shivering
• Sweating
• Vasodilation
• Vasoconstriction

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

When you are cold, you shiver and your blood vessels contract, which warms you up. When you are hot, you sweat and your blood vessels expand, which cools you down.  

• Positive Feedback Response
• Negative Feedback Loop 

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NGSS.HS-LS1-3

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response
• Negative Feedback Loop 

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NGSS.HS-LS1-3

Positive feedback is when the change caused by the stimulus is

• decreased
• non existant
• increased
• changes constantly

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

Tags

NGSS.HS-LS1-3

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

Salt water crocodiles bask in the sun for several hours every morning. which one of the following statements best describes the method of thermoregulation in salt water crocodiles?

• Endothermy, increase body temperature to increase rate of metabolism reactions in cells

• Ectothermy, decrease body temperature to increase rate of metabolic reactions in cells.

• Endothermy, decrease body temperature to increase rate of metabolic reactions in cells

• Ectothermy, increase body temperature to increase rate of metabolic reactions in cells

A student walks into a cold room.

Which of the following happens to his body?

• Sweating and vasodilation of blood vessels.

• Shivering and vasoconstriction of blood vessels

• Sweating and vasoconstriction of blood vessels.

• Shivering and vasodilation of blood vessels.

Tags

NGSS.HS-LS1-3

Diagram shows the cross section of human skin.

Which of the following will occur when the surrounding temperature drops below 10 ° C?

• R constrict

• Q relax

• P erect

• S become active

Tags

NGSS.HS-LS1-3