Ch 2: Online 1

Question 1

The body’s solvent is…..?

Answer 1

Water

Question 2

Why is oxygen needed by cells?

Answer 2

Oxygen is needed for cell respiration

Question 3

Carbon dioxide must be exhaled, because in excess it would…..?

Answer 3

Make body fluids too acidic

Question 4

What is the purpose of a buffer system?

Answer 4

Prevent drastic changes in pH

Question 5

What is glucose?

Answer 5

Glucose is a hexose sugar and a primary energy source for cells

Question 6

Where is excess or potential energy stored?

Answer 6

In skeletal muscles and the liver as glycogen

Question 7

Potential energy for cells is provided by…..?

Answer 7

Starches, lactose, and glycogen

Question 8

Why are oligosaccharides important?

Answer 8

Oligosaccharides are part of surface antigens that identify cells

Question 9

Why are triglycerides important?

Answer 9

Triglycerides are important for the storage of energy

Question 10

Fatty acids and glycerol are subunits of what?

Answer 10

Phospholipids

Question 11

Cholesterol is a precursor for what?

Answer 11

Vitamin D, which is needed for calcium metabolism

Question 12

What lipids are part of cell membranes?

Answer 12

Phospholipids and cholesterol

Question 13

What are the subunits of proteins?

Answer 13

Amino acids linked by peptide bonds

Question 14

What are enzymes?

Answer 14

All proteins, and they catalyze reactions

Question 15

Keratin is to skin as myoglobin is to what?

Answer 15

Muscles