Movement Across the Cell Membrane Flashcards Preview

Biology AS > Movement Across the Cell Membrane > Flashcards

Flashcards in Movement Across the Cell Membrane Deck (18)
Loading flashcards...
1
Q

What are the two types of transport and how are they different?

A

1) Passive- doesn’t require energy

2) Active- requires energy

2
Q

Why can water easily move across a membrane?

A

Water is a small molecule that can easily diffuse through the cell membrane without using energy

3
Q

Give an example of diffusion, and why does this happen.

A

When someone sprays perfume, it wants to reach equilibrium, so it spreads out across the entire room until it reaches equilibrium.

4
Q

What is osmosis?

A

The movement of water across a cell membrane

5
Q

What are three types of osmotic solutions?

A

Isotonic, Hypertonic, and Hypotonic

6
Q

If a cell is placed into a hypertonic solution, which way will the water move?

A

Out of the cell

7
Q

Which direction will the water move if a cell is placed in an isotonic solution?

A

Water would move in and out of the cell

8
Q

What happens to an animal cell when it is placed into a hypotonic solution?

A

What happens to an animal cell when it is placed into a hypotonic solution? It will burst

9
Q

What happens to a plant cell when placed into a hypotonic solution?

A

The pressure from the water in the vacuole will push against the cell wall, causing it to swell

10
Q

What is facilitated diffusion? Give an example of facilitated diffusion.

A

The movement of large molecules across a cell membrane through the use of carrier proteins; Glucose is an example of facilitated diffusion

11
Q

Name and explain one example of active transport.

A

Movement of large/charged ions across a membrane; Animal cells pumping sodium cells and potassium ions into the cell is an example of active transport

12
Q

What is the difference between endocytosis and exocytosis?

A

Endocytosis- Traps food and pinches off to form a vesicle

Exocytosis- Process where wastes are moved out of the cell

13
Q

What is the name for cell eating? Cell drinking?

A

Eating- Phagocytosis

Drinking- Pinocytosis

14
Q

Cell membranes can be described as?

A

Semi- Permeable and Selectively- Permeable

15
Q

Because of this, they are able to maintain what?

A

Homeostasis

16
Q

There are two basic types of what across the cell membrane? What are they called?

A

Movement; Passive and Active transport

17
Q

Passive Transport
Does it require energy?
Molecules move _______ the concentration gradient from areas of ______ concentration to _____ concentration.

A

No
down
high to low
diffusion, osmosis, and facilitated diffusion

18
Q

Active Transport
Does it require energy?
Molecules move ____ the concentration gradient, from areas of ______ concentration to ______ concentration.

A

Yes
Up
low to high