2 Cell Membrane

Question 1

Functions

Answer 1

Protect cell

Control Diffusion

Question 2

Define Diffusion

Answer 2

Restricting what can enter/leave the cell

Question 3

Define Simple Diffusion

Answer 3

Nonpolar molecule going right through the phospholipid bilayer using no energy

Question 4

It is the base attachment for what?

Answer 4

Cytoskeleton and cell wall

Question 5

Regulates cell by controlling what?

Answer 5

Endocytosis

Exocytosis

Question 6

Define Endocytosis

Answer 6

lipids and proteins are removed from the membrane

Question 7

Define Exocytosis

Answer 7

vesicles containing lipids and proteins fuses with the membrane, increasing cell size

Question 8

2 main components of the cell membrane?

Answer 8

Proteins and Lipids

Question 9

3 types of lipids

Answer 9

Phospholipids
Cholesterol
Glycolipids

Question 10

Define Phospholipids

Answer 10

form a semi-permeable layer consisting of a hydrophilic head and hydrophobic tail which face opposite each other

Question 11

Define Cholesterol

Answer 11

between phospholipids, keep cell membranes from becoming stiff
Not found in plant cells

Question 12

Define Glycolipids

Answer 12

On surface, carbohydrate sugar chain identifies other cells

Question 13

2 Types of Proteins

Answer 13

Peripheral Membrane Proteins

Integral Membrane Proteins

Question 14

Define Peripheral Membrane Proteins

Answer 14

exterior, connected via interactions with other proteins

Question 15

Define Integral Membrane Proteins

Answer 15

in membrane, most pass through the membrane or are exposed to both sides

Question 16

Several functions of the Integral Membrane Proteins

Answer 16

Structure
Receptor
Trasnprot: Facilitated diffusion
Glycoproteins
Channel Proteins

Question 17

Integral Membrane Proteins Function:

Structure

Answer 17

provide structure and shape

Question 18

Integral Membrane Proteins Function:

Receptor

Answer 18

communicate with environment via hormones, neurotransmitters, and other signaling molecules

Question 19

Integral Membrane Proteins Function:

Transport

Answer 19

can form to the size of substance passing through, able to determine polarity

Question 20

Integral Membrane Proteins Function:

Transport: Facilitated diffusion

Answer 20

proteins help things pass through, such as charged ions and glucose, a type of passive transport which moves from high to low concentrations

Question 21

Integral Membrane Proteins Function:

Glycoproteins

Answer 21

embedded in membrane to help communication and molecule transport (cell recognition proteins)

Question 22

Integral Membrane Proteins Function:

Channel Proteins

Answer 22

Allow ions and molecules to pass through from the extracellular portion to the intracellular portion