Plant And Animal Transport Flashcards Preview

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Flashcards in Plant And Animal Transport Deck (10)
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1
Q

Movement of electrical activity in heart

▪▪▪▪▪

A

SAN -> Collagen tissue -> AVN -> Bundle of His -> Purkyne tissue

2
Q

Ectopic heart beat

A

Early contraction of atria

3
Q

What is the Bohr effect

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A

Increase of CO2 in the blood
Causes reduction of haemoglobins affinity to O2
Dissociation curve shifts right

4
Q

Xylem vessel features

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A

No end walls
Walls made with parenchyma cells
Lignified

5
Q

Phloem vessel features

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A

Sieve tube elements form end wall
Companion cells provide ATP
No nucleus and few organelles

6
Q

Water movement through symplast pathway

A

Water moves through cytoplasm and plasmodesmata into neighbouring cells
Via osmosis

7
Q

Water movement through apoplast pathway

A

Water moves through cell walls and is blocked by Casparian strip so it takes symplast pathway

8
Q

Transpiration stream

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A

Transpiration (water vapour evaporates from leaf at top of xylem)
Tension (creates tension pulling water up)
Cohesion (water attracts other water molecules)
Adhesion (water attracted to xylem vessel)

9
Q

Xerophytes features

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A
Thick waxy cuticle 
Spines instead of leaves 
Close stomata during day 
Stomata in sunken pits 
Rolled up leaves 
Hairs on epidermis
10
Q

Hydrophytes features

A

Air spaces
Stomata only on upper surface
Flexible leaves and stem