Transport Across Cell Membrane

Question 1

What is the function of the cell membrane?

Answer 1

To control the movement of substances into and out of the cell.

Question 2

True or False: The cell membrane is selectively permeable.

Answer 2

True

Question 3

What are the two main methods of transport across the cell membrane?

Answer 3

Passive transport and active transport.

Question 4

Fill in the blank: Passive transport does not require ________.

Answer 4

Energy

Question 5

Which type of transport requires energy input from the cell?

Answer 5

Active transport

Question 6

What is the process where molecules move from an area of high concentration to an area of low concentration?

Answer 6

Diffusion

Question 7

What is the diffusion of water molecules called?

Answer 7

Osmosis

Question 8

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

Answer 8

Water

Question 9

Fill in the blank: Active transport moves substances ________ their concentration gradient.

Answer 9

Against

Question 10

What is the primary energy source for active transport?

Answer 10

ATP

Question 11

What is the term for the movement of substances across the cell membrane without the use of energy?

Answer 11

Passive transport

Question 12

Which type of transport allows cells to maintain homeostasis by controlling internal conditions?

Answer 12

Transport across the cell membrane

Question 13

What the function of cell membrane

Answer 13

Separates the cell contents from the sourroundings
The proteins on the surface of the cell membrane act as receptor sites for sntibodies and hormone
Channels or pores in the cell membrane allow molecules to enter and exit cell
This depends on the size and concentration
Cell membrane only allow small molecules to go through

Question 14

What does diffusion allow in our bodies

Answer 14

Allows gas exchange between alveoli, blood capillaries and body cells

Question 15

The process of diffusion between alveoli capillaries and body cells

Answer 15

Oxygen diffuses from the cell wall of alveoli to cell wall of capillaries to red blood cells

Question 16

Absorption of digested food

Answer 16

The proteins and carbohydrates that we eat are digested to form amino acids and glucose.In the small intestine the glucose and amino acids are diffuse use into the blood capillaries located in villi

Question 17

Importance of diffusion in plants

Answer 17

Gases diffuse in and out of the plant vis stomata.Water from the soil enters the plant through the root hair spells via osmosis

Question 18

What happens to a animal cell left in water concentration higher then what it has

Answer 18

The water moves in and since animal cell has no vacuole or cell wall it burst

Question 19

What happens animal cell in salt concentration wich btw will have a low water concentration

Answer 19

They animal cell shrinks

Question 20

What happens to plant cell in high water concentration

Answer 20

The vacuole plant cell will becom fat so turgid

Question 21

What happens to plant cell when there is a water concentration that is lower than it has

Answer 21

The plant cell becomes plasmolysed so the vacuole starts pulling away from cell membrane and looks manky

Question 22

Active transport

Answer 22

Uses energy (atp).It moves against the concentration gradient.The carrier proteins are the boss man as they recognise the molecule or ion and transport it across the cell membrane

Question 23

Examples of active transport in animal and plant

Answer 23

For animal there is sodium ions pumped out and pottsaioum ions are pumped into the cells.This helps muscles function.In plants iodine coming into the sea weed.from low concentration to higher bc active transport