Human Anatomy & Physiology 1
Bio 111

Use Chapter 3 in your textbook to do these Pre-Workshop Activities.

Activity A

Answer each of the following questions.

1. What is diffusion?

2. What is osmosis?

3. What happens to a cell if you put it in:

a) Concentrated sugar solution?





b) What if you put it in distilled water?

4. Describe the solute concentrations for each of the following solutions compared to a red blood cell.

a) hypertonic

b) hypotonic

c) isotonic

5. What does it mean to travel down or along a concentration gradient?

6. What does it mean to travel up or against the gradient?

.7 What kind of transport is associated with:

A channel?

A pump?

A transporter?

No protein at all?

8. Explain the difference between active and passive transport.

9. Give an example of a molecule which diffuses across the membrane without any help.

10. What is Exocytosis?

11. What is Endocytosis?

12. Draw a sketch of how these processes work.

Pinocytosis

Phagocytosis

Pre-Workshop Activities Home Page