Biology/Chem ATDH

Water is polar meaning it has a slight negative charge and positive charge from what elements?

oxygen (-) and hydrogen (+)

Water’s polarity allows what bonds to form?

Hydrogen bonds between water molecules.

Surface tension is created when

water molecules stick together due to hydrogen bonding, resulting in a cohesive force.

When water molecules spread out to other surfaces, this is called

adhesion

What property of water regulates body temperature and stabilizes aquatic environments

High specific heat

Water requires a small or large amount of heat for evaporation

large

What property of water is essential for chemical reactions, nutrient transport, and waste removal in the body

Water’s role as a universal solvent

If you were asked to take the pH of human blood, what pH would you expect to see?

human blood 7.35-7.45

pH measures the concentration of …. in a solution

hydrogen ions (H+)

A high concentration of hydrogen ions results in

low pH (0-6) acidic

A high pH is an increase or a decrease in hydrogen ions? What range of pH does this correspond to?

decrease. 8-14 basic/alkaline

An equal concentration of what ions results in a neutral pH? What number is considered neutral?

hydrogen ions and hydroxide ions (OH^-), pH of 7 is neutral

Suppose you tested the pH of the stomach. What result would you expect to see?

pH of 1.5-3.5 (acidic)

What two things aid in digestion in the stomach?

hydrochloric acid (HCL) and the enzyme pepsin