Biology 2

Whip-like cell extensions that give the cell mobility?

flagella

the "steady state" or constant condition maintained by the body is called ______ .

homeostasis

Flat sacs that package and ship vesicles outside the cell?

Golgi apparatus

Who was the first scientist to discover cells with the use of a homemade microscope?

Robert Hook R

A cell excreting sodium from within, against the natural tendency of matter it is performing __

active transport

All cells have ______

an outer membrane or plasma membrane a nucleus

Schleiden and Schwann believed that _______.

cells are the basic units of life

A green pigment in plants that serves to trap the Sun's energy for photosynthesis?

chlorophyll

Protein fibers that provide support and shape for the cell?

cytoskeleton

An air freshener can change the scent of a room by ______

diffusion

Series of tubes in a cell that are believed to be used as channels for transporting molecules.

endoplasmic reticulum

Glucose and amino acids move in or out of a cell by _____.

facilitated diffusion

Characteristics of plant cells include which of the following?

large hypertonic vacuole

Characteristics of animal cells include which of the following?

large hypertonic vacuole cell plate in cell division

Packets within the cell that contain digestive enzymes

lysosome

Location of DNA and RN, contains chromosomes and the nucleolus?

nucleus

The third level of cell organization is the ______.

organ level

The diffusion of water across a semipermeable membrane?

osmosis

Part of a cell that stores food or pigments

plastids

These cells are part of the domains Archaea and Bacteria

prokaryotes

The organic substance making up the cells of all living things

protoplasm

Part of a cell that builds proteins

ribisomes

An electron microscope is usually used for microorganisms that are ________.

too small to be seen with an optical microscope.

Sacs containing protein produced by the endoplasmic reticulum?

vesicle