Chapter 7_ 3/6/13

Question 1

Cell

Answer 1

Basic unit of life

Question 2

Cell theory

Answer 2

Idea that all living things are composed of a cell

Question 3

Cell membrane

Answer 3

A thin ,flexible barrier around the cell

Question 4

Cell wall

Answer 4

Strong layer around the cell membrane in plants

Question 5

Nucleus

Answer 5

Small, dense region within most nuclei. Where ribosomes begins

Question 6

Prokaryotes

Answer 6

Single-celled microorganism that lacks a nucleus

Question 7

Eukaryotes

Answer 7

Organisms which cells contain nuclei

Question 8

Organelle

Answer 8

Specialized structure that performs important cellular function

Question 9

Chromatin

Answer 9

Material visible within the nucleus

Question 10

Chromosome

Answer 10

Threadlike structure within the nucleus containing genetic information

Question 11

Nuclear envelope

Answer 11

Double membrane layer surrounds the nucleus of a cell

Question 12

Cytoskeleton

Answer 12

Network of protein filaments ; helps cells maintain it’s shape

Question 13

Microtubule

Answer 13

Hollow tube of protein that maintains cell shape; “Shape”

Question 14

Microfilament

Answer 14

Long, thin fiber that functions in the movement and support of the cell

Question 15

Ribosome

Answer 15

Small particle in the cell on which protein are assembled.

Question 16

Endoplasmic reticulum

Answer 16

Internal membrane system
• Cell membrane are assembled
• proteins are modified

Question 17

Golgi apparatus

Answer 17

Stack of membranes in the cell in which enzymes attack carbohydrates and lipids to protein

Question 18

Lysosome

Answer 18

Cell organelle filled with enzymes needed to breakdown certain materials in the cell

Question 19

Vacuole

Answer 19

Organelle found in the cells of plants and some other organisms that uses energy from sunlight to make energy.

Question 20

Mitochondrion

Answer 20

Cell organelle that releases energy from stored food molecules

Question 21

Lipid bilayer

Answer 21

Core of nearly all cell membrane is double layered sheet

Question 22

Concentration

Answer 22

A mass of solute in a given volume of solution or mass/solution

Question 23

Diffusion

Answer 23

Cells move from area of high concentration to an area of low concentration

Question 24

Selective permeability

Answer 24

Allows certain substance to pass through them

Question 25

Osmosis

Answer 25

Diffusion of water

Question 26

Active transport

Answer 26

With Energy using, cells move from area of low concentration to area of high concentration.

Question 27

Endocytosis

Answer 27

Cells take material into the cell by infolding of the cell membrane

Question 28

Phagocytosis

Answer 28

Extension of cytoplasm

Question 29

Exocytosis

Answer 29

A cell releases large amounts of material

Question 30

Cell specialization

Answer 30

Separate roles for each type of cell in multicellular organism

Question 31

Tissue

Answer 31

A group of similar cells that perform a function

Question 32

Organ

Answer 32

Group of tissues that work together to perform closely related functions.

Question 33

Organ system

Answer 33

Group of organs that work together to perform a specific function