Quiz 4.5 - Movement Across Cell Membrane

Question 1

What does it mean to be selectively permeable?

Answer 1

allow some things through more easily than others

Question 2

what do membrane proteins do

Answer 2

aid in the transport of some molecules through the membrane into and out of cell

Question 3

what is diffusion

Answer 3

• random movement of particles
• move down a conc gradient (high to low)
  -spontaneous process

Question 4

What is tonicity?

Answer 4

ability of a surrounding solution to cause a cell to gain or lose water

Question 5

what does it mean to be isotonic?

Answer 5

-solute conc equal on both sides of membrane
-no net movement of water

Question 6

what does it mean to be hyper tonic

Answer 6

• more solute conc
  -less water conc

Question 7

what does it mean to be hypotonic?

Answer 7

• less solute conc
• higher water conc

Question 8

What is the function of the nucleus

Answer 8

• stores genetic information

Question 9

What is the function of the nucleolus

Answer 9

• makes ribosomes

Question 10

What is the function of the cytoplasm

Answer 10

• contains the contents of the cell

Question 11

What is the function of the cytosol

Answer 11

• Gel-like matrix that holds water and nutrients

Question 12

What is the function of the cytoskeleton

Answer 12

• structure, support and transport

Question 13

What is the function of ribosomes

Answer 13

makes protein

Question 14

What is the function of the rough ER

Answer 14

makes proteins for the endomembrane system

Question 15

What is the function of the smooth ER

Answer 15

detoxifies the cell and makes lipids

Question 16

What is the function of the golgi apparatus

Answer 16

sorts and ships proteins

Question 17

What is the function of the mitochondria

Answer 17

makes energy

Question 17

What is the function of lysosomes

Answer 17

removes unwanted material and waste

Question 18

What is the function of peroxisomes

Answer 18

regulate biochemical pathways that involve oxidation

Question 19

What is the function of vacuoles

Answer 19

store water and nutrients

Question 20

What is the function of vesicles

Answer 20

transport materials around the cell

Question 21

What is the function of the cell membrane

Answer 21

a thin flexible barrier that separates the cell from its environment

Question 22

What is the function of the cell wall

Answer 22

rigid barrier that protects the cell

Question 23

What is the function of the large central vacuole

Answer 23

stores water and regulates turgor pressure

Question 24

What is the function of chloroplasts

Answer 24

makes food using the process of photosynthesis

Question 25

what is the function of carbohydrates, and its structure

Answer 25

identifying cells, and interacting with other cells
- a sugar attached to the cell membrane

Question 26

what is the function of a glycolipid, and its structure

Answer 26

• cellular recognition
• a sugar attached to a lipid

Question 27

what is the function of a glycoprotein, and its structure

Answer 27

• cell signalling, cell adhesion
• a sugar attached to a protein

Question 28

what is the function of cholesterol, and its structure

Answer 28

Influences fluidity and has different effects depending on temperature—at high temperatures, it reduces phospholipid movement; at colder temperatures, it prevents solidification by disrupting the packing of phospholipids.

Question 29

what is the function of a peripheral protein, and its structure

Answer 29

• support, enzymes
• a protein outside the cell membrame

Question 30

what is the function of a integral protein, and its structure

Answer 30

A protein that passes through the cell membrane, assisting in the transfer of hydrophilic substances and ions (charged particles).
- IN the membrane