Transportation

Question 1

blood transports (w plasma and rbc in specific)

Answer 1

PLASMA: food, CO2, nitrogenous waste
RBC: O2

Salts, etc

Question 2

Aorta

Answer 2

oxygenated blood
heart > body
left ventricle > body

Question 3

Vena cava

Answer 3

deoxygenated blood
body > heart
body > right atrium

Question 4

Pulmonary veins

Answer 4

Oxygenated blood
Lungs > heart
Lungs > left atrium

Question 5

Pulmonary arteries

Answer 5

Deoxygenated blood
Heart > lungs
Right ventricle

Question 6

Why does heart have diff chambers

Answer 6

Prevent mixing of ox/deox blood

Question 7

Valves

Answer 7

Prevent backflow

Question 8

Which has thicker walls? atria or ventricles

Answer 8

Ventricles: they need to pump out blood

Question 9

Why do some animals have 3 chambered hearts

Answer 9

Amphibians reptiles etc do not need to maintain their body temperatture, they need less energy

Question 10

Fish have __ chambers in their heart

Answer 10

2

Question 11

What is double circulation

Answer 11

when blood goes through the heart twice during each cycle

vertebrates

Question 12

which have thicker walls? arteries or veins? why

Answer 12

arteries have thick elastic walls as they need to reach various organs and are pumped at high pressure

veins simply have valves that ensure blood flows in the correct direction

Question 13

Platelets function

Answer 13

platelet cells are present in blood and circulated

they plug leaks and clot blood at points of injury

Question 14

Lymph (aka?)

Answer 14

Tissue fluid

Plasma, proteins and blood cells that escape into intercellular spaces in tissues, via pores in capillaries

Similar to plasma but colourless and has less protein

Question 15

Lymphatic system

Answer 15

Lymphatic capillaries join to form
large lymph vessels that finally open into
larger veins

Question 16

Lymph function

Answer 16

Carries digested and absorbed fat from intestine

drains excess fluid from intercellular space back into the blood

Question 17

Why can plants use relatively slow transport systems

Answer 17

Plants dont move
Plants have a large proportion of dead cells
hence they have low energy requirements

Question 18

Xylem tissue includes

Answer 18

water-conducting channel reaching all parts of the plant
vessels and tracheids of the roots stems and leaves are connected

Question 19

How do roots absorb water

Answer 19

Cells in contact with soil take up ions
Creates difference in ions
Water moves into the root to eliminate difference

Question 20

Transpiration

Answer 20

The loss of water in the form of vapour from the aerial parts of the plant

Question 21

Transpiration functions

Answer 21

Upward movement of water and minerals dissolved in it

temperature regulation

removal of excess water

Question 22

Translocation

Answer 22

transport of soluble products of photosynthesis, amino acids and other subtstances

that occurs in phloem

Question 23

Where does translocation occur

Answer 23

sieve tubes of phloem with the help of companion celss

Question 24

How does phloem transport substances where they are needed

Answer 24

Materials (like sucrose) is transferred into phloem using ATP

This increases osmotic pressure of tissue, causing water to move into it

This pressure moves into tissues with less pressure

example> sugar stores in root&raquo_space; buds