Test 1- Lecture 2

Question 1

Functions of cells (8)

Answer 1

Covering
Lining
Storage
Movement
Connection
Defense
Communication
Reproduction

Question 2

Example of the function “covering”

Answer 2

Epidermal cells in skin

Question 3

Example of function of “lining”

Answer 3

Epithelial cells in small intestine

Question 4

Example of the function “storage”

Answer 4

Fat/liver cells

Question 5

Example of the function “connection”

Answer 5

Collagen fibers in fibroblasts

Question 6

Example of the function defense

Answer 6

Lymphocytes

Question 7

Example of the function “movement”

Answer 7

Muscles cells of heart

Question 8

Example of the function “communication”

Answer 8

Nerve cells

Question 9

Example of the function “reproduction”

Answer 9

Sperm and ooctye cells

Question 10

Does the prototypical human cell exist?

Answer 10

NO!!! It is generalized

Question 11

3 parts that are in every cell

Answer 11

Plasma membrane
Cytoplasm
Nucleus

Question 12

Is the plasma membrane selectively permeable or completely permeable?

Answer 12

Selectively permeable. Only certain things can pass.

Question 13

Structure of plasma membrane

Answer 13

Fluid/flexible bilayer

Question 14

What is the plasma membrane made of (3)?

Answer 14

Lipids
Proteins
Glycocalyx

Question 15

3 lipids the plasma membrane has

Answer 15

Phospholipids (majority)
Glycolipids
Cholesterol

Question 16

What are phospholipids composed of?

Answer 16

Glycerol
Phosphate
2 fatty acids

Question 17

Is the phosphate (head) hydrophilic or hydrophobic?

Answer 17

It is hydrophilic

Question 18

Are the fatty acid tails hydrophilic or hydrophobic?

Answer 18

They are hydrophobic

Question 19

What are glycolipids composed of?

Answer 19

Carbohydrates and lipids

Question 20

Function of glycolipids

Answer 20

Adhesion to other cells

Cell recognition

Question 21

Function of cholesterol

Answer 21

Stabilizes membrane fluidity with temperature changes

Question 22

What do proteins determine in cells?

Answer 22

The function of the cell

Question 23

Where can one find integral proteins?

Answer 23

Embedded in the membrane

Remember “integrated”

Question 24

What does transmembrane mean?

Answer 24

Can cross the membrane completely

Question 25

Where are peripheral proteins found?

Answer 25

On inner or outer surface of membrane

Question 26

Functions of proteins (6)

Answer 26

Transport
Intercellular connection
Anchoring skeleton
Cell recognition
Enzyme activity
Signal transduction (outside molecule triggers change inside in inside molecule)