Homeostasis Regents Review

The diagram illustrates the release of chemical A from a human cell in response to a specific stimulus.

Which cell structure plays a direct role in the release of this chemical from the cell?

• nucleus

• ribosome

• chloroplast

• cell membrane

Which of the following is a disease where sufferers cannot control their blood glucose levels?

• Diabetes

• Influenza

• Cholera

• Cystic fibrosis

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What describes a lack of water in the blood?

• Dehydration
• Rehydration
• Hydration
• Concentrated

This happens due to involuntary contractions of voluntary muscles to warm up

• Shivering

• Sweating

• Vasodilation

• Vasoconstriction

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

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

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You are growing a tomato plant in your house. Which of the following would the plant probably do to help maintain homeostasis?

• Grow away from the light coming from the window

• Grow toward the light coming from the window

• Growth is not affected by the light coming from the window

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Why does your heart beat faster when you exercise?

• To provide your muscle cells extra oxygen

• To provide your muscle cells extra carbon dioxide

• To heat your body up

• To make you feel more tired

The group of organisms that use the process of homeostasis includes

• mammals, only

• animals, only

• plants and animals

• all living things

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The diagram represents two single-celled organisms. These organisms carry out the activities needed to maintain homeostasis by using specialized internal

• tissues

• organelles

• systems

• organs

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