Tissues, Organs, Organ System

Question 1

WHY ARE ORGAN SYSTEMS DEVELOPED?

Answer 1

Large multicellular organisms need to exchange materials with their environment and develop systems to do so

Question 2

WHAT IS CELL DIFFERENTIATION ?

Answer 2

CELLS BECOME SPECIALISED

During the development of a multicellular organism, cells differentiate so that they can carry out different functions

Question 3

WHAT IS A TISSUE?

Answer 3

A tissue is a group of specialised cells that have similar structures and functions

Question 4

3 TYPES OF TISSUES AND THEIR FUNCTIONS?

Answer 4

Muscular Tissue
• contracts, bringing out movement

Glandular Tissue
• produces substances such as enzymes and hormones

Epithelial tissues
• covers some parts of the body

Question 5

3 TISSUES AND THEIR FUNCTIONS IN THE STOMACH !!!

Answer 5

Muscular tissue —churns food

Glandular tissue — produces digestive juiced including acid and enzymes

Epithelial tissue - covers the inner and outer surfaces of the stomach

Question 6

WHAT IS THE ORGAN SYSTEM

Answer 6

The organ system is a group of organs that work together to carry out a particular function

Question 7

4 TYPES OF ORGAN SYSTEMS

Answer 7

• Nervous system
• respiratory system
• digestive system
• reproductive system

Question 8

The function of:

PANCREAS AND THE SALIVARY GLANDS

Answer 8

Produces digestive juices and enzymes called amylase

Question 9

Function of:

THE STOMACH

Answer 9

DIGESTS FOOD

Question 10

Function of:

THE LIVER

Answer 10

Produces bile

Question 11

Function of:

SMALL INTESTINES

Answer 11

Digests and absorbs soluble food

Question 12

Function of:

LARGE INTESTINE

Answer 12

absorbs water from undigested food, producing faeces

Question 13

PLANTS ARE MULTICELLULAR ORGANISMS

True or false?

Answer 13

TRUE

Question 14

WHAT ARE THE 3 MAIN ORGANS OF A PLANT?

Answer 14

• STEM (supports, elevates leaves, transports fluids between roots and shoots - Xylem and phloem)
• ROOTS (To absorb and deliver water and nutrients, acts as an anchor
• LEAVES (helps plant produce food

Question 15

3 PLANT TISSUES

Answer 15

• epidermal tissue
Cover the plant

• mesophyll
Carries out photosynthesis

• xylem and phloem
Transports substances around the plant

Question 16

WORD EQUATION FOR PHOTOSYNTHESIS

Answer 16

Carbon dioxide
\+ 
Water
= ((light energy))
Glucose 
\+ 
Oxygen

Question 17

SYMBOL EQUATION FOR PHOTOSYNTHESIS

Answer 17

CO2 + H(2)0 —> C6H12O6 02

Question 18

WHAT DOES XYLEM TRANSPORT

Answer 18

Transports water and mineral ions

Question 19

WHAT DOES PHLOEM TRANSPORT

Answer 19

Transports the sugars

Question 20

WHAT IS THE RATE OF PHOTO SYNTHESIS

Answer 20

the speed at which photosynthesis takes place

Question 21

LIMITING FACTORS OF

photosynthesis

Answer 21

• temperature
• amount of water/ CO2 available
• light intensity

Question 22

BENEFITS OF GREENHOUSES

Answer 22

Conditions can be controlled
• artificial light means plants photosynthesise 24 hours
• artificial heating allows photosynthesis to continue at an increased rates
• additional carbon dioxide released

Question 23

WHAT IS WIDELY USED TO INCREASE THE RATE OF PHOTOSYNTHESIS IN A GREENHOUSE?

Answer 23

A paraffin lamp

Question 24

NEGATIVES OF PARAFFIN LAMPS

Answer 24

• evaporation rates will increase, not enough water, decrease in photosynthesis
• stomata close in heat (no diffusion of CO2
• enzymes begin to denature so cannot carry out their functions

Question 25

PHYSICAL FACTORS AFFECTING ORGANISMS

Answer 25

• temperature 
• amount of light
• availability of water 
   Nutrients 
   CO2 and oxygen

Question 26

METHODS OF COLLECTION DATA (distribution of organisms)

Answer 26

TRANSECTS
A line across a habitats, recorded and observed at intervals

QUADRATS
square wires 10 x 10, can me measured systematically or randomly