Lesson 1, Chapter 2

Question 1

Subatomic particles

Answer 1

The tiny particles that make up an atom

Question 2

Atom

Answer 2

The smallest complete unity of physical matter

Question 3

Molecule

Answer 3

A particle that is made up of two or more atoms bound together

Question 4

Carbohydrates

Answer 4

Molecules that serve as your primary energy source

Question 5

Lipids

Answer 5

A major class of molecules that contains carbon, hydrogen, and oxygen, but relatively few oxygen atoms

Question 6

Triglyceride

Answer 6

A type of lipid that is stored as fat and that can be used as an energy source

Question 7

Phospholipid

Answer 7

A type of lipid that is the main component of our cell membranes

Question 8

Cholesterol

Answer 8

A type of lipid used to strengthen cell membranes and to make testosterone and estrogen

Question 9

Proteins

Answer 9

A major class of molecules that are made up of chains of amino acids bound together

Question 10

ATP

Answer 10

A nucleic acid that stores energy in its chemical bonds

Question 11

DNA and RNA

Answer 11

Nucleic acids that tell our cells how to build proteins

Question 12

Organelles

Answer 12

Different structures found inside the cell that have specific functions

Question 13

Cells

Answer 13

The smallest complete units of living matter

Question 14

Tissues

Answer 14

Groups of cells that have the same function

Question 15

Epithelial tissue

Answer 15

A type of tissue that lines your organs and forms your glands

Question 16

Connective tissue

Answer 16

A major class of tissue that contains very different tissues such as blood, bone, and cartilage; types connect body parts together, protects, supports, cushions, and insulates the body

Question 17

Nervous tissue

Answer 17

Tissue that makes up sensory receptors, brain, spinal cord, and nerves

Question 18

Muscle tissue

Answer 18

Tissue that is designed for contraction (the shortening of tissue)

Question 19

Skeletal Muscle Tissue

Answer 19

Muscles tissue that attaches to bones; called voluntary

Question 20

Smooth Muscle Tissue

Answer 20

Muscle tissue found in hollow organs and blood vessels; called involuntary

Question 21

Cardiac Muscle Tissue

Answer 21

Muscle tissue found in the heart; called involuntary

Question 22

Organs

Answer 22

Groups of tissues that are specialized for a specific function

Question 23

Organ systems

Answer 23

Groups of organs that work closely together