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