Semester Exam Review C

How does a cell maintain homeostasis?

• Regulates what enters and leaves

• Maintains its flexibility

• Produces a protective barrier

The cell membrane is selectively permeable, which means...

• All materials can enter and leave the cell

• Certain things can enter while others cannot

• Nothing can enter a cell

Controlling what enters or leaves the cell without energy is

• active transport

• passive transport

Molecules move across the cell membrane from an area of HIGH concentration to an area of LOW concentration through a carrier protein. This is

• Facilitated Diffusion

• Osmosis

• Active Transport

What is the difference between ACTIVE and PASSIVE transport?

• Active does not need energy and passive uses ATP (energy)

• Active uses ATP (energy) and passive does not need energy

• Active stores transport proteins and passive releases them

In this photo, where is there a LOW concentration of dye?

• at the bottom of cup

• at the top of cup

Against the concentration gradient

low to high

uses energy/ATP

• facilitated diffusion

• osmosis

• active transport

This picture represents what type of cell transport?

• active transport

• passive transport

The division of the nucleus is known as:

• DNA Synthesis

• Mitosis

• G1

• G2

The cell spends most of its life in ________________.

• mitosis

• cytokinesis

• interphase