INTRODUCTION

Stimuli are constantly affecting us and our daily lives. Therfore, it is important to understand how stimuli can cause changes in our enviroment and how we are able to adapt to them. We detect and respond to stimuli in order to survive.
Stimuli: Changes in the enviroment.
Receptor: Structures that are able to sense changes in he enviroment (eg: Photoreceptors, thermoreceptors)
Coordinator: The organs that get the infromation from the receptors, analize it and sent a proper answer to the effectors (Nervous and endocrine system)
Effector: Structures that carry out the response (In animals muscles and glands)
Response: How organisms reacts to a stimulus and results in a change behaviour (Effect, consequence)

HOW DO THE LIVING THINGS RESPONSE?

In plants responses are slowly and related with growth. In animals are faster. There are two types of response in from a stimulus:
Movement: Punctual and fast responses carried out by the locomotion apparatus (Muscles)
Excretion: A substance is released into the body. Carried out by glands.

BEHAVIOUR

The behaviour of an animal is the ways in which it reacts and relates to stimuli and the enviroment.

Innate behaviour:
-Instinctive (fixed action patterns) geneticaly based.
-Not modified by the individual.
-Generally uniform: low variation in population.
-Unnafected by enviroment (in the individual).
-Benefical behaviours envolve through natural selection: survival and reproduction.
-Examples: Suckling instinct in newborns.
Migration of blackcaps.
Hunting instincs.

Learned behaviour:
-Based in experience.
-Modified by the individual.
-High variation within the population.
-Capacity to learn may be product of natural selection, rather than specific behaviours.
-Examples: Adquisition of language 8 social skills.
Domesticated behaviour in pets.
Training dolphins to perform.

	Created by aubavc over 9 years ago

Natural Sciences (Relationship and coordnaion) Note on Relationship and coordination, created by aubavc on 19/05/2015.