Marathon Unit Review

Front

What is osmosis?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane via channel proteins without the use of energy.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels large quantities of materials, such as toxins and waste, by vesicles fusing with the plasma membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle.

Front

What is the role of channel proteins in the cell membrane?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane, allowing for selective permeability.

Front

How does exercise affect carbon dioxide levels in the body?

Back

During exercise, carbon dioxide levels increase, which can lead to an increase in heart rate.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others, maintaining homeostasis in the cell.

Front

What is equilibrium in the context of cellular transport?

Back

Equilibrium is the state where the concentration of a substance is equal on both sides of a membrane, resulting in no net movement.