Chapter 2: Chemistry Of Life

Question 0

Elements

Answer 0

Pure substances that cannot be broken down

Question 1

Matter

Answer 1

Has mass and occupies space

Question 2

Compounds

Answer 2

Chemical combinations of two or more elements

Question 3

CHON

Carbon
Hydrogen
Oxygen
Nitrogen

Answer 3

98.5% of the human body is made of these four elements

Question 4

Homeostasis

Answer 4

Maintenance of a relatively stable internal environment despite changes in external conditions

Question 5

Ionic bond

Answer 5

Chemical bonds where the electrons are not shared equally

Question 6

Covalent bond

Answer 6

Chemical bond where the electrons are shared equally

Question 7

Hydrogen bond

Answer 7

Chemical bond where a weak attraction between a slightly positive hydrogen and a slightly negative oxygen exists

Question 8

Metabolism

Answer 8

The sum of all the chemical reactions in the body

Question 9

Catabolism

Answer 9

Involves breaking down complex compounds into simpler ones

Question 10

Anabolism

Answer 10

Involves building larger and more complex chemical molecules from smaller sub units

Question 11

Water is a
…
…
…

Answer 11

Solvent, substances

Lubricant, clings to tissue and forms a lubricant film on membranes

Temperature, changes slowly

Question 12

Carbohydrates

Answer 12

Body’s main energy source they catabolize into simple sugars

Question 13

Lipids

Answer 13

Store energy, provide structure to membrane, insulate nerves, serve as vitamins, cushion organs

Question 14

ATP

Answer 14

Adenosine triphosphate

Question 15

Triglycerides

Answer 15

Most abundant lipid

Breaks down into three fatty acid and glycerol

Question 16

Proteins

Answer 16

Body’s most abundant organic compounds

Catabolize into amino acids