Chapter 3 Cells: The Living Unit

Question 0

Cytoplasm:

Answer 0

Everything between nucleus and plasma membrane (cell membrane)

Question 1

What does the cell membrane (plasma membrane) do?

Answer 1

Protects outside of cell

Question 2

Plasma membrane means the same as…

Answer 2

Cell membrane

Question 3

Nucleus

Answer 3

Control center.

Question 4

Chromatin

Answer 4

DNA portion

Question 5

What is a cell membrane composed of!

Answer 5

Phospholipid bilayer

Question 6

2 parts of phospholipids

Answer 6

Hydrophilic heads &

Hydrophobic tails

Question 7

Water soluble (hydrophilic)

Answer 7

Can’t pass through cell membrane

Question 8

Lipid soluble (hydrophobic )

Answer 8

CAN pass through cell membrane

Question 9

MEMBRANE PROTEIN FUNCTIONS..

1. Transport

Answer 9

Hydrophilic channel—

Selective for certain solutes

Question 10

2. Receptors

Answer 10

Binding sites on outside of cell

Question 11

3. Attachment

Answer 11

-Proteins serve as anchor points,
-helps maintain shape and position of cell
help cells move or bind other cells

Question 12

4. Enzymatic activity

Answer 12

Proteins serve as enzymes

Question 13

5. Intercellular joining

Answer 13

Proteins of adjacent cells may be hooked together

Question 14

6. Cell-cell recognition

Answer 14

Some glycoprotein serve as ID tags

Question 15

Name 3 types of membrane junctions

Answer 15

tight junction
Desosome
Gap junction

Question 16

Tight junctions

Answer 16

Prevent molecules from passing through the intercellular space

Question 17

Desosomes

Answer 17

Bond cells together to form fibers

Question 18

Gap junctions

Answer 18

Allows cells to communicate

Ions move across directly; contrast as one
Stomach growl

Question 19

Selectively permeable

Answer 19

Cell membrane has control of what can exit and enter