Unit 1 Cells - Multi cellular organisms

Question 1

Definition of cells?

Answer 1

Microscopic building blocks of all living things

Question 2

Definition of tissues?

Answer 2

Similar cells with the same structure grouped together.

Question 3

Definition of organs?

Answer 3

Structure made of several tissue types that carry out a particular function (eg. the heart/ a leaf)

Question 4

Definition of organ systems ?

Answer 4

A group of organs that operate together to carry out aparticular function (eg. circulatory system)

Question 5

Definition of organism?

Answer 5

All the organ systems grouped together make a complex animal/plant

Question 6

Complete the flow diagram :
Cell – Tissue – Organ – Organ system

Answer 6

Cardiac muscle cell – cardiac muscle tissue – heart – circulatory system

Question 7

What is the function of the ‘Nervous System’ ?

Answer 7

responds to stimuli and making responses

Question 8

What are the main organs of the nervous system?

Answer 8

brain, spinal cord, receptors (eg.eye), effectors (eg.muscles)

Question 9

Function of ‘excretory system’?

Answer 9

maintaining water balance and removing poisonous waste

Question 10

Main organs of excretory system?

Answer 10

Kidney, ureter, bladder, urethra

Question 11

Explain how a ‘red blood cell’ is specialised?

Answer 11

biconcave shape/ no nucleus, allowing more oxygen to be carried

Question 12

How is a ‘neurone’ specialised ?

Answer 12

long and thin with many extensions

Question 13

How is s a sperm cell specialised?

Answer 13

Has a tail to swim to egg

Question 14

How is a root hair cell (in plant roots) specialised?

Answer 14

Long extension to absorb water.

Question 15

How are ‘ciliated epithelial cells’ specialised?

Answer 15

Cilia to waft to & fro removing bacteria from airways.