Week 12 Flashcard (11/01/24)

Front

What part of a phospholipid is hydrophobic?

Back

The lipid 'tails'.

Front

What happens to a cell placed in a solution with a higher salt concentration than that of the cell?

Back

The cell will shrivel.

Front

What does the top picture represent in terms of cellular transport?

Back

Exocytosis.

Front

What does the bottom picture represent in terms of cellular transport?

Back

Endocytosis.

Front

What is facilitated diffusion?

Back

The process where substances move from a high to a low concentration through transport proteins without the use of energy.

Front

What is osmosis?

Back

The diffusion of water across a semi-permeable membrane.

Front

What is the main function of phospholipids in cell membranes?

Back

To form a bilayer that acts as a barrier to most water-soluble substances.

Front

What is the difference between exocytosis and endocytosis?

Back

Exocytosis is the process of expelling materials from the cell, while endocytosis is the process of taking materials into the cell.

Front

What role do protein channels play in facilitated diffusion?

Back

They allow specific substances to pass through the plasma membrane without using energy.

Front

What is the effect of a hypertonic solution on a cell?

Back

It causes the cell to lose water and shrivel.