Endocytosis and Exocytosis - Q2

cell membrane

The ________ controls what goes
in and out of the cell.

bulk transport

Sometimes, the cell needs to move
large molecules such as food particles,
waste, or proteins. When this happens, the cell uses a
process called _______________.

Bulk transport

It uses vesicles — small
sacs made from the cell membrane —
to move materials.

two main types of
bulk transport:

Endocytosis and Exocytosis

Endocytosis

Brings materials into the cell

Exocytosis

Moves materials out of the cell

Substances move in two main ways:

Passive transport and Active transport

Passive Transport

It does not need energy.

Passive Transport

(Examples: diffusion, osmosis, facilitated diffusion)

Active Transport

Requires energy (ATP) to move materials against their concentration gradient.

Endocytosis

This happens when the cell takes in substances from its surroundings

Endocytosis

The cell membrane folds inward, forms a pocket, and then closes to create a vesicle inside the cell. This is?

lysosomes

After endocytosis, the vesicle can then merge with other organelles, like ____________, to digest the material.

Endocytosis

Phagocytosis, Pinocytosis, Receptor-Mediated ________are examples of?

Phagocytosis

Example of this type of endocytosis is that the cell takes in large solid particles like food and bacteria.

Pinocytosis

It is when the cell takes in liquids or small dissolved particles.

Receptor-Mediated Endocytosis

The cell uses receptor proteins on its surface to capture specific molecules.

Phagocytosis

Examples are white blood cells engulfing bacteria

Pinocytosis

Example of this type of endocytosis are Absorption of nutrients by cells

Receptor-Mediated Endocytosis

Example: this type of bulk transport aids the Intake of cholesterol into the cell.

Exocytosis

This is the opposite of endocytosis, and it is the process by which the cell releases materials or waste outside.

Exocytosis

Here’s how it works:

1. The Golgi apparatus packages material into the vesicles.

2. These vesicles move toward the cell membrane.

3. The vesicle fuses with the membrane and releases its contents outside the cell.

Exocytosis

The function of this type of transport is:

• Removes waste and cell byproducts

Exocytosis

The function of this type of transport is:

• Releases proteins, hormones, or enzymes made by the cell

Exocytosis

The function of this type of transport is:

• Allows nerve cells to release neurotransmitters

Exocytosis

Example of this is when nerve cells send signals, they release neurotransmitters into the space between nerve endings through exocytosis.

neurotransmitters

Example of exocytosis is when nerve cells send signals, they release what into the space between nerve endings through exocytosis?