Animals response to changes in their enviroment

Question 1

What is simple behaviour and how does it work?

Answer 1

Simple behaviour is the reflex response to a stimulus, a change in the environment of an organism, it by passes thought and is involuntary so therefore is rapid. Because of this it is used by simple animals as the majority of their behaviour to help them survive

Question 2

What are examples of simple behaviour reflexes in humans and animals?

Answer 2

In humans reactions include pupil reflex, knee jerk and letting go of a hot object. Animals use reflex responses to find food and shelter from predators

Question 3

What makes up a nervous co-ordination? (Stimulus to response)

Answer 3

Receptors to detect stimuli,
Sensory neurons to carry the impulse,
Processing center to coordinate (brain etc.),
Motor neuron to carry impulse,
Effector to produce a response.

Question 4

What are hormones and how are responses different to nervous systems responses?

Answer 4

Hormones are chemicals produced in glands that bring about slower longer-lasting responses, compared with electrical impulses used in nerves.

Question 5

How have nervous and hormonal communication systems come about?

Answer 5

They have developed over time dependent on the evolution of multicellular organisms.