Chapter 3 Virtual Investigations
Transport Across Cell Membranes
Directions: On your device desktop, Select the following (Repository, Science,
Biology Virtual Investigations, Biology Virtual Investigations, Cell Biology)
Select: Transport Across Cell Membranes
1.
What is the cell membrane composed of?
2.
What are the two areas of the cell membrane?
3.
What does polarity affect?
4.
What portion of the cell membrane is polar?
5.
What portion of the cell membrane is nonpolar?
6.
What is embedded in the cell membrane?
7.
What does the cell membrane do?
8.
What types of things affect the amount of energy needed?
9.
What substances can move or be actively transported through the cell
membrane?
10.
What is a concentration gradient?
11.
What is diffusion?
12.
What is passive transport?
13.
How do polar molecules and ions repelled by the nonpolar interior of the
phospholipid bilayer get across the cell membrane?
14.
What is osmosis?
15.
What is the charge of water?
16.
What do carrier proteins do?
17.
What happens when the substance fits into the binding site?
18.
Give two examples of polar substances that diffuse through carrier proteins?
19.
What is active transport?
20.
What does active transport require?
21.
What is one of the most important membrane pumps in animal cells?
22.
What direction are the substances moved using this pump?
23.
How many of each substance is moved through the membrane?
24.
What is endocytosis?
25.
What is exocytosis?