Cell Homeostasis

Question 1

Which homeostatic process requires energy to move particles across the plasma membrane?

Revolt · Accepted Answer

active transport

Question 2

Which adaptation helps polar bears maintain a constant internal temperature (thermal homeostasis) in cold weather?

Revolt · Accepted Answer

blubber

Question 3

How does the contractile vacuole in a single-celled organism function to maintain homeostasis?

Revolt · Accepted Answer

It pumps water out of the cell.

Question 4

Which statement describes the ability of the cell membrane to allow various substance to move through it?

Revolt · Accepted Answer

The cell membrane is selectively permeable.

Question 5

Which homeostatic process moves particles against a concentration gradient?

Revolt · Accepted Answer

active transport

Question 6

For diffusion to occur, which condition must be met?

Revolt · Accepted Answer

A concentration gradient must exist.

Question 7

The data in the graph are the result of a paramecium being placed in a hypertonic salt solution.What change would most improve the usefulness of the graph?

Revolt · Accepted Answer

Replace the concentration descriptions with actual values.

Question 8

Which process is characterized by the movement of particles from an area of high concentration to an area of low concentration across the plasma membrane without the use of energy?

Revolt · Accepted Answer

passive transport

Question 9

Reptiles and birds excrete waste as an insoluble white solid that is called uric acid. How does this help them to maintain internal homeostasis in hot climates?

Revolt · Accepted Answer

by retaining water

Question 10

Which motion of particles across a membrane requires energy?

Revolt · Accepted Answer

from low concentration to high concentration

Cell Homeostasis Answers

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