Biology Flashcards 1 - Testing (e.g. carbs), Heart, Lungs, Leaves

Question 1

What happens to CO2 in the alveoli

Answer 1

Diffuses into the alveoli from plasma

Question 2

Test for carbohydrates

Answer 2

Starch = Iodine Test- orange to blue/black
Sugars = Benedicts solution - blue to brick red

Question 3

What is a double circulatory system

Answer 3

Two pumps working at the same time to pump blood in 2 different directions (Lungs, heart)

Question 4

What is coronary heart disease

Answer 4

The coronary arteries that supply blood to the heart muscle become narrow

Question 5

What is an active site

Answer 5

The special site in the enzyme where the substrate binds

Question 6

Colour change for protein

Answer 6

Buiret = Blue - Purple

Question 7

Structural factors of capillaries

Answer 7

Very small lumen
Wall made of a single layer of a cell

Question 8

What diffuses into the blood from the body/tissues/organs

Answer 8

CU IN THERE
C02
Urea

Question 10

What four factors affect the rate of transpiration

Answer 10

Light intensity
Temperature
Humidity
Air movement

Question 11

What is a pathogen

Answer 11

A microorganism that can cause diseases

Question 12

What is used to measure the rate of transpiration

Answer 12

Potometer

Question 13

What happens to oxygen in the alveoli

Answer 13

Diffuses from the alveoli into red blood cells

Question 14

What is the palisade mesophyll layer and what happens here

Answer 14

• Where most of photosynthesis takes place.
• The top layer of cells long and thin, densely packed together
• Contains a lot of chloroplasts

Question 15

What are the other cells that line the trachea and bronchi

Answer 15

Oppenheimer
Cilia

Question 16

Describe how we breathe

Answer 16

• Air comes down strong tube called the trachea
• Trachea branches into two smaller tubes called bronchi
• Each bronchi has branches called bronchioles
• At the end of these are alveoli, where the oxygen, where the oxygen moves from the air into the blood

Question 17

How does an artificial pacemaker work

Answer 17

Electrical device that corrects irregularities in heart rate

Question 18

Artificial heart valve
Advantages:
Disadvantages:

Answer 18

Advantages: Lasts a very long time
Disadvantages: Need to take medication for the rest of your life

Question 19

What diffuses out of the blood into body/tissues/organs

Answer 19

GOA
Glucose
Oxygen
Amino Acids

Question 20

What are the 4 factors of the blood in the vein

Answer 20

1 - Low pressure
2 - Smooth blood flow
3 - Dark red
4 - De-oxygenated

Question 21

What does the lower epidermis of the leaf do

Answer 21

• Contains pores called stomata which let gases in and out of the leaf

Question 22

What are stomata

Answer 22

• Pores that let gases in and out
• Controlled by guard cells

Question 23

What is the method for the stomata peel practical

Answer 23

• Collect a leaf
• Paint a bit of nail varnish on the top and bottom of the leaf
• After dry, put a strip of clear tape on both sides and then peel off both.
• Tape them onto the slides and view through microscope

Question 24

What causes coronary heart disease

Answer 24

Build up of fatty material on the lining of the vessels