1 choice answer

Question 1

What are the two main components of the lipid bilayer?

Answer 1

Phospholipids and cholesterol

Question 2

True or False: The lipid bilayer is a selectively permeable barrier.

Answer 2

True

Question 3

Fill in the blank: The lipid bilayer is composed of a double layer of ________ molecules.

Answer 3

Phospholipid

Question 4

What is the definition of selective permeability?

Answer 4

Selective permeability is the property of a membrane that allows certain substances to pass through while preventing others from passing.

Question 5

True or False: Selective permeability is essential for maintaining homeostasis in cells.

Answer 5

True

Question 6

What are some factors that affect the selectivity of a membrane?

Answer 6

Size, charge, and solubility of molecules

Question 7

Fill in the blank: Selective permeability is achieved through the presence of ________ in the membrane.

Answer 7

protein channels or transporters

Question 8

What is a concentration gradient?

Answer 8

A concentration gradient is the difference in concentration of a substance between two areas.

Question 9

True or False: Diffusion is a passive process.

Answer 9

True

Question 10

Fill in the blank: Diffusion is the movement of particles from an area of ______ concentration to an area of ______ concentration.

Answer 10

higher, lower

Question 11

How does temperature affect the rate of diffusion?

Answer 11

Higher temperatures generally increase the rate of diffusion.

Question 12

What role does the concentration gradient play in the process of diffusion?

Answer 12

The concentration gradient drives the movement of particles from areas of higher concentration to areas of lower concentration.

Question 13

What is the relationship between temperature and the rate of diffusion?

Answer 13

As temperature increases, the rate of diffusion also increases.

Question 14

How does the size of particles affect the rate of diffusion?

Answer 14

Smaller particles diffuse faster than larger ones.

Question 15

True or False: Diffusion occurs faster in gases compared to liquids.

Answer 15

True

Question 16

What role does concentration gradient play in diffusion?

Answer 16

A steeper concentration gradient leads to faster diffusion.

Question 17

Fill in the blank: The _______ the distance, the slower the rate of diffusion.

Answer 17

greater

Question 18

What is the key difference between active transport and facilitated diffusion?

Answer 18

Active transport requires energy input to move molecules against their concentration gradient, while facilitated diffusion does not require energy and moves molecules along their concentration gradient.

Question 19

True or False: Active transport always moves molecules against their concentration gradient.

Answer 19

True

Question 20

Which type of transport process requires the use of transport proteins: active transport or facilitated diffusion?

Answer 20

Facilitated diffusion

Question 21

What is an example of a molecule that is typically transported through active transport?

Answer 21

Sodium ions (Na+)

Question 22

What is osmosis?

Answer 22

The movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Question 23

True or False: In osmosis, water moves from an area of higher solute concentration to an area of lower solute concentration.

Answer 23

False

Question 24

Fill in the blank: Osmosis is the movement of ________ molecules across a selectively permeable membrane.

Answer 24

water

Question 25

What does it mean for a solution to be hypertonic?

Answer 25

A solution with a higher concentration of solutes compared to another solution.

Question 26

Which way does water move in relation to a hypertonic solution?

Answer 26

Water moves out of the cell into the hypertonic solution.

Question 27

What is the definition of a hypotonic solution?

Answer 27

A solution with a lower concentration of solutes compared to another solution.

Question 28

True or False: In a hypotonic solution, water moves into the cell causing it to swell.

Answer 28

True

Question 29

What happens to a red blood cell in a hypotonic solution?

Answer 29

It will swell and potentially burst due to water entering the cell.

Question 30

What is the definition of an isotonic solution?

Answer 30

A solution with the same concentration of solutes compared to another solution.

Question 31

True or False: In an isotonic solution, there is no net movement of water into or out of the cell.

Answer 31

True

Question 32

True or False: Phagocytosis is a form of endocytosis.

Answer 32

True

Question 33

Fill in the blank: Phagocytosis is carried out by specialized cells called _______.

Answer 33

Phagocytes

Question 34

What is exocytosis?

Answer 34

Exocytosis is the process by which cells release substances outside of the cell through fusion of vesicles with the plasma membrane.

Question 35

True or False: Exocytosis is an active transport process.

Answer 35

True

Question 36

Fill in the blank: Exocytosis is the opposite process of ____________.

Answer 36

Endocytosis