Unit 2 - Organistaion of the Organism

Question 1

Ciliates Cells

Answer 1

Tiny hairs that line trachea and other passageways. In the trachea and bronchi they beat to move mucus up and out of the airway.

Question 2

Root Hair Cells

Answer 2

Have long thin extensions to increase the surface area to maximise the absorption of water and ions from the soil.

Question 3

Xylem Vessel Cells

Answer 3

• Water and ion transport
• Gives structural support to the plant stem and leaves.

Question 4

Pallisade Mesophyll Cells

Answer 4

Tightly packed layer of cells close to the surface of the leaf. Packed with chloroplasts for photosynthesis.

Question 5

Nerve Cells

Answer 5

Conduction of nerve impulses. Have thin long extensions that are insulated in parts to increase speed of the impulse being transmitted.

Question 6

Red Blood Cells

Answer 6

Contain haemoglobin that carries oxygen. Adapted to their function with biconcave shape and no nucleus to provide larger surface area.

Question 7

Sperm Cell

Answer 7

Contains male genetic information. Has tail (flagellum) adapted for swimming.

Question 8

Egg Cell

Answer 8

Contains female genetic information. Large size, contains yolk as energy store.

Question 9

Tissue

Answer 9

A group of cells with similar structures, working together to perform a shared function.

Question 10

Organ

Answer 10

A structure made up of a group of tissues, working together to perform specific functions.

Question 11

Organ System

Answer 11

A group of organs with related functions,working together to perform body functions.