Chapter 1- Characteristics of Living Organisms

Mrs Gren

Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition

Why are Virusus not classified as organisms

Because they cannot reproduce independtly- they must infect a host cell to make copies of themselves. And because they do not carry out metabolism(don’t respire/grow or use energy like living cells)

What is Movement?

Movement is the moving action from your body or parts of your body

What is Respiration?

The releasing of energy from glucose

What is Sensitivety?

Detecting+Responding to changes in the Environment

What is Nutrition?

The taking in of minerals for reactions to take place

What is Excetion?

The removal of Waste Products

What is Reproduction?

Producing new offspring by themsleves or other species

What is Growth?

Increaing in size and/or the number of cells

What is the difference between Excretion and Egestion ?

Excretion is the removal of waste products

Egestion is the removal of undigested food material(faeces) from the body through the anus

Excretory Substances include Urea

Urea—> Produced in the liver and then removed through the kidneys/skin

What is a Stimulus?

A Stimula —> Plural= Stimulus is a change in the environment. Example, light,change in temperature etc.. These are detected by specialsed cells called receptors.

What are Receptors?

Receptors detect Stimula and they are found in Humans, located in the- eye’s, skin, nose, and tongue

Eyes—> To detect light
Skin—> To detect touch
Nose—> To detect smell
Tongue—> To detect taste

What are the two types of Respiration?

Aerobic Respiration—> Takes place in the Mitochondira

Anarobic Respiration—> Takes place in the Cytoplasm

What is the Control of Internal Environment?

Also known as Homeostasis. This is to keep things in between, to have it in an acceptable range, example temparature, water, glucose.