Mr Afriyie Gas exchange - Photosynthesis flashcards

Question 1

Upper Epidermis

Answer 1

beneath the cuticle. Transparent layer that allows light to pass through.

Question 2

Cuticle

Answer 2

Waxy layer that prevents water loss.

Question 3

Palisade Mesophyll

Answer 3

The palisade mesophyll is a layer of elongated, tightly packed cells below the upper epidermis, with many chloroplasts for maximum light absorption.

Question 4

Chloroplasts

Answer 4

Absorb light for phostosynthesis found within the palisade mesophyll.

Question 5

Spongy Mesophyll

Answer 5

The spongy mesophyll consists of round cells with many air spaces below the palisade mesophyll, allowing gas diffusion.

Question 6

Vascular Tissue

Answer 6

tube-like structures (xylem and phloem) often found in the center of the leaf sections

Question 7

Xylem

Answer 7

Part of the vascular tissue. It transports water.

Question 8

Phloem

Answer 8

Part of the vascular tissue, smaller tubes located below the xylem in the bundle. It transports food substances e.g. sucrose.

Question 9

Air Space

Answer 9

Air spaces mainly in the spongy mesophyll, allow gases like oxygen, carbon dioxide, and water vapor to move freely. This helps with gas exchange during photosynthesis and respiration.

Question 10

Lower Epidermis

Answer 10

The lower epidermis of a leaf protects the inner tissues and helps regulate gas exchange.

Question 11

Stomata

Answer 11

Stomata are tiny leaf openings that take in carbon dioxide and release oxygen and water vapor, controlling water loss by opening and closing.

Question 12

Gas exchange

Answer 12

diffusion of carbon dioxide into the leaf and oxygen diffusing out of the leaf

Question 13

Guard cell

Answer 13

It opens and closes to allow gases to diffuse through the stomata.