The unit used to express the mass of the particles in an atom.

The smallest part of any element. Made up of protons, neutrons and electrons.

Identifies the number of protons in an atoms nucleus.

Describes what an atom looks like

The negatively charged particles in an atom

The region inside an atom where electrons are likely to be found

A charged atom

Atoms of the same element that have different numbers of neutrons

The total number of protons and neutrons in the nucleus of an atom

The particles in the nucleus of an atom that do not have a charge (neutral)

The small, dense, positively charged center of an atom

made up of atoms with the same number of protons joined together by chemical bonds

made up of atoms of two or more different elements joined together by chemical bonds

Atoms bond together in different ways to make ________________.

H₂O is a compound.

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

Atoms of a polar molecule share their atoms ___________.

The ability of water molecules to stick to each other, creating surface tension is called:

Why does water move from the roots to the leaves of plants?

Which of the following require energy to take place?

Which of the following does not require energy to take place?

Whereas _____ involves taking particles into the cell, _____ involves taking particles out of the cell.

Active transport is the movement of large materials across a cell membrane from ______ to ______ concentration

Active transport across a cell membrane from low to high concentration, requires

A type membrane protein that can pump one substance in one direction, while transporting another substance in the opposite direction.

An example of pump transport is

A general term for the various types of active transport that move particles into a cell by enclosing them in a vesicle made out of plasma membrane.

A form of bulk transport in which materials are transported from the inside to the outside of the cell in membrane-bound vesicles that fuse with the plasma membrane.

white blood cells engulfing invading bacteria is an example of

Particle of movement from an area of lower concentration to an area of higher concentration.

Particle of movement from an area of higher concentration to an area of lower concentration.

Which type of transport uses energy in the form of ATP to transport substances?

Which type of passive transport uses transport proteins to transport items such as glucose through the membrane?

Which type of passive transport focuses on the movement of water through the membrane?

Which of these is not a form of passive transport?

What type of active transport does waste move out of the cell?

Active transport requires

Some cells move large particles out of the cell through the process of:

What part of the cell regulates what can enter and leave the cell?  

What are the two types of cell transport?

What macromolecule is embedded into the lipid bilayer and helps to transport molecules?

This picture shows molecules of red dye that have moved. What is this type of movement called?

According to the fluid mosaic model of cell membranes, phospholipids___________________.

An animal cell lacking in carbohydrates on the external surface of its plasma membrane would likely be impaired in which function?

Which of the following is the correct name of the model that describes the structure of the cell membrane?

What is the primary role of aquaporins?

Plasma membranes are selectively permeable. This means