Homeostasis

The basic unit of living things

• cell

• homeostasis

• nucleus

• mitochondria

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What allows water to pass in and out of the cell?

• chloroplast

• cell membrane

• nucleus

• mitochondria

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Which of the following statements supports the idea that cells extract energy from food to sustain life?

• A paramecium breaks down organic matter to live.

• Cells are the most basic unit of life.

• Yeast are living organisms made of one cell.

• An E. coli cell divides in half, forming two daughter cells.

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The tendency of an organism to maintain a balanced state so as to maintain health and functioning

• Nucleus

• Homeostasis

• Cell Membrane

• Cell

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Animals exhale to get rid of carbon dioxide waste. In what way do cells function in the same way?

• The remove waste created by cellular activities.

• The reproduce to grow and replace.

• They transport needed nutrients to various cell parts.

• They break down food to obtain energy.

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NGSS.MS-LS1-2

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For any activity such as running, jumping, and hunting, animals have to use energy obtained from food. What organelle performs a similar function within a cell to fuel cellular activities?

• mitochondria

• nucleus

• cell membrane

• chloroplast

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NGSS.MS-LS1-2

Jennifer is learning the parts of the cell and knows that there must be a structure responsible for maintaining the homeostasis of the cell. This structure is which of the following?

• Cell membrane

• mitochondria

• nucleus

• chloroplast

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NGSS.MS-LS1-2

As conditions change inside and outside the cell, the cell must adjust to maintain a stable internal environment. Which of the following is NOT an example of how cells maintain homeostasis?

• The cell membrane regulates what enters and exits the cell.

• The nucleus contains all the genetic information of the cell.

Which of the following is the best definition for homeostasis

• The movement of particles from one side of a cellular membrane to another.

• The tendency of particles to distribute themselves evenly across a membrane.

• The ability to maintain and regulate stable internal conditions of the cell.

Plants have openings on their leaves called stomata, through which gases, including water vapor, can pass in and out of the plant. Plants open and close stomata inorder to regulate the exchange of gases with the atmosphere. Why might itbenefit plants to keep their stomata closed under certain conditions?

• To reduce water loss during a drought.

• To increase energy production at night.

• To decrease the need for nutrients.

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