Coordination & Response

Which is needed for a coordinated response?

• Stimulus

• Receptor

• Effector

• Inhibitor

Which is a stimulus?

• Light

• A neurone

• The eye

• A muscle or gland

Which is a receptor?

• Light

• A neurone

• Rod cells in the eye

• A muscle or gland

Which is an effector?

• Light

• A neurone

• The eye

• A muscle or gland

The maintenance of a constant internal environment is...

(a)  

Compared to the nervous system, the endocrine system generates responses that are...

• generally slower

• generally longer lasting

• often affecting a large area of the body

• often targeting a very small area of the body

Hormones...

• Are released by glands

• Travel in the blood

• Travel along nerves

• Are released by the brain

Compared to the endocrine system, the nervous system generates responses that are...

• generally faster

• generally short term

• often affecting a large area of the body

• often targeting a very small area of the body

Why do organisms need to respond to stimuli from their environment?

• To find food

• To escape predators

• To find a mate

• To move

Select all the stimuli that affect humans

• Scent molecules

• Light

• Sound

• Pressure