2.3 Surface Area, Volume and Life

Review: Does diffusion require energy?

• Yes diffusion requires energy because it is a form of active transport.

• No diffusion does not requires energy because it is a form of passive transport.

• Yes diffusion requires energy because it is a form of passive transport.

• No diffusion does not requires energy because it is a form of active transport.

How do you calculate the surface area to volume ratio?

• surface area divided by volume

• surface area multiplied by volume

• volume divided by surface area

The "smaller" a cell is ...

• the larger its surface area-to-volume ratio

• the smaller its surface area-to-volume ratio

If the cell were too big what would happen? Check ALL that apply.

• The cell wouldn't be able to keep track of the all nutrients it has absorbed.

• Food and O₂ would not be able to reach all parts of the cell fast enough by diffusion

• Waste would not be able to leave the cell fast enough by diffusion

What is the advantage of large ear flaps for elephants?

• It increases the surface area for heat to diffuse out so they can maintain homeostasis.

• It allows them to hear better.

• It allows elephants to have larger cells.

Why is being large an advantage for whales?

• The have a high surface area to volume ratio which prevents heat loss by diffusion into their cold environment

• The have a low surface area to volume ratio which prevents heat loss by diffusion in their cold environment.

• They can scare their predators