Lesson One

Question 1

What is the pH of blood?

Answer 1

7.4 pH

Question 2

Blood temperature averages?

Answer 2

37 degrees Celsius

Question 3

Negative feedback

Answer 3

The process by the body to become stable

Question 4

Negative feedback description

Answer 4

Control centres in the brain and other organs release hormones that cause body reactions. Once normalcy is reached, the control centre is no longer stimulated.

Question 5

Positive feedback

Answer 5

The process by the body to become unstable

Question 6

Definition of positive feedback

Answer 6

Instead of achieving normalcy, the adaptive response further stimulus the regulatory centre. An increasingly unstable situation results.

Question 7

Normal blood glucose levels

Answer 7

70-110 mg/dl

Question 8

Is water organic

Answer 8

Nah it doesn’t have carbon

Question 9

Covalent bond

Answer 9

Equal sharing of electrons

Question 10

Ionic bond

Answer 10

Unequal sharing of electrons

Question 11

Polar covalent

Answer 11

Molecules that have dipoles (regions with slight positive and negative natures).

Question 12

What type of molecule is H2O

Answer 12

Polar covalent bond

Question 13

Are water molecules loosely attracted to one another?

Answer 13

Yes

Question 14

The negative charge on the oxygen attracts the positively charged hydrogen to produce….

Answer 14

A weak bond called a hydrogen bond

Question 15

Hydrogen bonds are…

Answer 15

Weak

Question 16

Each water molecule can form hydrogen bonds with up to ___ neighbours

Answer 16

4

Question 17

Solution

Answer 17

Is a mixture of one or more soluble substances

Question 18

Solute

Answer 18

Thing that is dissolved

Question 19

Solvent

Answer 19

Liquid that dissolves solute

Question 20

Water is a temperature moderator

Answer 20

Water absorbs a great deal of heat while only rising its temperature a slight amount. Water also releases heat slowly. This property is referred to as high heat of evaporation

Question 21

Evaporative cooking

Answer 21

As a liquid evaporated the most energetic molecules are carried away leaving the lower kinetic molecules behind which cools the surface of the liquid

Question 22

Cohesive

Answer 22

Water molecules stick to each other

Question 23

Adhesive

Answer 23

Water molecules stick to other molecules

Question 24

Buffer

Answer 24

Buffers are chemicals or combinations of chemicals that are able to keep pH levels constant despite adding more and more acid