Chapter 3 – Cell Structure And Function

Basic unit of life.

Lower magnification, Uses light beams to view images, can view live specimens.

2-D image, uses electrons to view internal structure, high magnification, no live specimens.

3-D image, uses electrons to view surface structures, high magnification, no live specimens.

Type of cell that lacks a membrane-bound nucleus and organelles

Type of cell that has a membrane-bound nucleus and membraneous organelles.

An outer membrane that regulates what enters and exits the cell.

Selectively permeable, meaning it allows certain molecules - but not others - to enter the cell.

Contents of the cell between the nucleus and the plasma membrane that contains organelles

Small membraneous structure in the cytoplasm of eukaryotic cells with a specific structure and function

The random movement of molecules from a higher concentration to a lower concentration.

The net movement of water across a semi permeable membrane.

Controls the water movement in our bodies.

Have equal amounts of solute inside and outside the cell and thus do not affect the cell.

Have less solute then the inside of the cell and lead to lysis (bursting)

Have more solute then the inside of the cell and lead to crenation (shriveling)

A molecule is transported across the plasma membrane from the side of higher concentration to the side of lower concentration.

The movement of molecules from a lower to higher concentration using ATP as energy; it requires an energy carrier.

Transports molecules or cells into the cell via invagination of the plasma membrane to form a vesicle.

Transports molecules outside the cell via the fusion of a vesicle with the plasma membrane.

Is the combination of DNA molecules and proteins that make up the chromosomes.

Where ribosomal RNA (rRNA) is produced

The nucleus is separated from the cytoplasm by a double membrane known as the nuclear envelope.

Organelles composed of proteins and rRNA