Cell Homeostasis

Question 1

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

Revolt · Accepted Answer

blubber

Question 2

Which motion of particles across a membrane requires energy?

Revolt · Accepted Answer

from low concentration to high concentration

Question 3

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

Revolt · Accepted Answer

active transport

Question 4

Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?

Revolt · Accepted Answer

active transport

Question 5

Water makes up a large percentage of the body’s cells. For a cell to remain in homeostasis, there must be a mechanism to control water changes in the cells. The movement of water from an area of high water concentration to an area of low water concentration is

Revolt · Accepted Answer

osmosis

Question 6

Which best describes the difference between osmosis and diffusion?

Revolt · Accepted Answer

Diffusion is the movement of particles from a high to low particle concentration, while osmosis is the movement of water from a high to a low water concentration.

Question 7

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 8

For diffusion to occur, which condition must be met?

Revolt · Accepted Answer

A concentration gradient must exist.

Question 9

Which best describes dynamic equilibrium?

Revolt · Accepted Answer

Particles are moving into and out of the cell, but their concentrations remain stable.

Question 10

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

Revolt · Accepted Answer

It would swell and then burst.

Cell Homeostasis Answers

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