Chapter 8 Section 1

Question 1

What is Osmosis?

Answer 1

Diffusion of water across selectively permeable Membrane

Question 2

What is diffusion?

Answer 2

The spreading of substance more widely

Question 3

What is a concentration gradient?

Answer 3

Unequal Distribution of particles

Question 4

What is an isotonic Solution?

Answer 4

Concentration of dissolved substances in solution that are the same as in the cell

Question 5

What is a Hypotonic Solution?

Answer 5

Concentration of dissolved substances that are higher outside the cell; Cells shrink

Question 6

What is a Hypertonic Solution?

Answer 6

Leaves cell by osmosis

Question 7

What is passive transport?

Answer 7

Cell using NO energy to move particles

Question 8

What is facilitated diffusion?

Answer 8

Passive transport; uses transport proteins to move across Membrane

Question 9

What are the two types of transport proteins?

Answer 9

Channel proteins

Carrier proteins

Question 10

What is Active transport?

Answer 10

Moving materials through Membrane using concentration gradient; requires energy

Question 11

Why is transport of substances across Membrane required?

Answer 11

To maintain homeostasis

Question 12

What is endocytosis?

Answer 12

Process where cell surrounds and takes IN materials

Question 13

What is exocytisis?

Answer 13

Expulsion or secretion of material from cell; EXITS