Cellular Interactions with the Environment

Question 1

Complete the statement to describe the calcium concentration that must be maintained in human body cells. The calcium concentration must be greater the cell than ⇒ inside the cell.

Revolt · Accepted Answer

Part 1: outside; ⇒ inside: 122880

Question 2

✔ out ofintothroughout

Revolt · Accepted Answer

out of

Question 3

Maintaining a certain calcium concentration is important for the proper functioning of which cells? Check all that apply.skin cellsnerve cellsblood cellsliver cellsmuscle cells

Revolt · Accepted Answer

nerve cells; muscle cells

Question 4

Complete the statement to describe the sodium-potassium pump. The sodium-potassium pump moves ions into the cell and ions out of the cell.

Revolt · Accepted Answer

Part 1: potassium; Part 2: 122884

Question 5

The diagram shows a pump. Which labels can replace X and the Y in the diagram?

Revolt · Accepted Answer

X: sodium, Y: potassium

Question 6

Which statement describes a similarity between the calcium pump and the sodium-potassium pump?

Revolt · Accepted Answer

Both pumps use proteins to transport substances across the cell membrane.

Question 7

Why do pumps require energy?

Revolt · Accepted Answer

Pumps move substances from areas of low concentration to areas of high concentration.

Cellular Interactions with the Environment Answers

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