plants, blood and blood vessels Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

transpiration

A

water moves from the roots to the leaves in the xylem. water moves in one direction only (up) and evaporates out of the stomata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

translocation

A

sucrose, glucose and starch move into the phloem. the movement of substances is either up or down.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

explain 3 adaptions of the xylem

A

dead cells with no walls between them to create an empty tube.

thick side wall to make the xylem rigid.

lignin rings along with the thick side wall means that the xylem does not collapse or burst under water pressure.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

explain 4 key adaptions of the phloem

A

sieve tube transports sucrose made by photosynthesis,

central channel is connected by holes to the next cell

companion cells actively pumps sucrose in and out of sieve cells.

sucrose being pumped into sieve cells at the leaf increases the pressure, causing the sucrose to move up and down the plant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

artery (BV)

A

thin lumen, thick elastic walls, under high pressure, carry blood away from the heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

veins (BV)

A

thick and wide lumen, valves that prevent back flow, under low pressure, brings blood back to the heart. large space for the blood to travel back.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

capillaries (BV)

A

one cell thick walls which create a short diffusion distance. allows substances to diffuse rapidly through the blood and body cells

as blood passes through substances like glucose and oxygen diffuse out of blood into cells.

carbon dioxide diffuses from cells into blood.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

plasma (B)

A

liquid part of blood. carries blood cells through blood vessels. contains dissolved substances such as carbon dioxide and glucose.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

platelets (B)

A

dead cells that form scabs (clotting) which stops excessive bleeding and prevents pathogens from entering. no nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

lymphocytes/ white blood cells (B)

A

fight disease, antigens, pathogens, antitoxins and phagocytes by engulfing pathogens. have a nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

erythrocytes/red blood cells (B)

A

carry oxygen, haemoglobin, no nucleus and have a biconcave shape.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

3 adaptions of the alveoli

A

millions of tiny air sacs/ alveoli create large surface area, thin walls that are one cell thick for shorter diffusion distances. ventilation allows continuous blood flow which creates high concentrations for maximum diffusion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly