Chapter 7 (2)

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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


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