Chapter 7 (2)
the process that REQUIRES AN INPUT OF ENERGY to help material move from an area of low concentration to an area of greater concentration
Active Transport
what are four levels of organization in a multicellular organism?
Individual cells, tissues, organs and organ systems
what is an organ system
a group of organs that work together to perform a specifiic function
what is a tissue?
a group of similar cells that perform a particular function
the fourth, and highest level of organization in a multicellular organism is
an organ system
the basic unit of life
cell
thin, flexible barriers around the cell
cell membrane
strong supporting layer around the cell membrane that protects the cell.
cell wall
name the levels of organization - list in order
cell, tissue, organ, organ system
what is cell specialization in a multicellular organism?
cells throughout an organism can develop in different ways to perform different tasks.
which organelles can use energy from sunlight to create energy rich food molecules
chloroplasts
granular material visible within the nucleus
chromatin
threadlike structures that contain the genetic information of the cell
chromosomes
portion of the cell outside the nucleus
cytoplasm
the network of protein filaments that help maintain the shape of the cell is called the
cytoskeleton
particles tend to move from an area of high concentration to an area of low concentration in a process known as
diffusion
what is the process by which material is taken into the cell by infolding of the cell membrane
endocytosis
organism whose cells contain a nucleus
eukaryote
the proces by which a protein channel allows molecules to cross the cell membrane is called
facilitated diffusion
the double layer sheet that makes up nearly all cell membranes is called
lipid bilayer
what are four main types of tissue in most animals?
muscle, epithelial, nervous and connective tissue
what kind of tissue can be found within a muscle within your body?
nervous tissue and connective tissue
the small dense region in the nucleus where the assembly of ribosomes begins is called
nucleolus
large structure that contains the cells genetic information
nucleus
What is a group of tissues that work together called?
organ
groups of tissue that work together to perform a specific function are called an
organ
specialized structures within a cell that perform important cell functions
organelle
process in which water difusses through a selectively permeable membrane is called
osmosis
process by which extensions of cytoplasm engulf large particles
phagocytosis
organism whose cells do not contain a nucleus
prokaryote
what is a group of cells that perform a particular function called?
tissue
a single cell organism is also called a
unicellular organism
