term test two

Question 1

what is the role of vales in the heart ?

Answer 1

valves regulate blood flow so that blood travels through the heart in one direction and at the right rate

Question 2

what is osmosis?

Answer 2

a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

Question 3

what solution do you use to test for starch?

Answer 3

• iodine solution

- orange-> blue/black

Question 4

what solution do you use to test for lipids?

Answer 4

• ethanol

- clear-> milky/cloudy

Question 5

what solution do you use to test for protein?

Answer 5

• Bivret solution

- -turnes purple

Question 6

what solution do you use to test for glucose?

Answer 6

• Benedict’s reagent

- blue-> orange/red

Question 7

what enzyme breaks down starch? products?

Answer 7

• amylase

- sugars

Question 8

what enzyme breaks down proteins? products?

Answer 8

• protease

- amino acids

Question 9

what enzyme breaks down lipids? products?

Answer 9

• lipase

- glycerol

Question 10

What do emulsifiers do?

Answer 10

they allow you to mix fats with water-based substances. doesn’t usually work e.g. oil and water don’t mix

Question 11

name an emulsifier?

Answer 11

bile

Question 12

how can enzymes be used out side of the body?

Answer 12

in baby food - protease

in lactose free foods -lipase

Question 13

what are some properties of of arteries?

Answer 13

• thick-hight pressure
• elastic and muscular walls
• small lumen size
• has few small valves
• direction is away from the heart

Question 14

What are some properties of veins?

Answer 14

• elastic and muscular walls
• large lumen size
• has valves
• direction is towards the heart

Question 15

What are some properties of Capillaries?

Answer 15

• thin walls -substances can pass through
• have microscopic lumen
• has no direction