Week 16 Flashcardizz: Unit 2 Lightbulb #1 and #2 Review

Front

What is a nonpolar molecule?

Back

A nonpolar molecule is one in which electrons are shared equally between atoms, resulting in no overall charge difference across the molecule.

Front

What happens to cells in seawater?

Back

In seawater, cells lose water and begin to shrink due to osmosis, as salt enters the cell.

Front

What is the role of proteins in membrane transport?

Back

Proteins are needed for both active and passive transport to move molecules across the cell membrane.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.

Front

What is the daily recommended amount of caffeine for adults?

Back

The daily recommended amount of caffeine for adults is 400mg.

Front

What is a polar molecule?

Back

A polar molecule is one that has a partial positive charge on one end and a partial negative charge on the other, due to unequal sharing of electrons.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, typically against their concentration gradient.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along their concentration gradient.

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.