Core Biology-Reflexes

Get Revising

Created by: DJSalt
Created on: 26-03-17 16:42

Core Biology: Reflexes: Define "Reflex"

A reflex is an automatic (involuntary) response to a specific stimulus

1 of 7

What does a reflex action not involve?

The conscious part of the brain

2 of 7

What does the reflex action involve?

Involves the spinal cord/unconscious part of the brain only

3 of 7

Why do reflexes exist?

To increase an organisms chance of survival

4 of 7

Give 3 examples of a reflex action

Touching a hot object will bring about a muscle contraction reflex. Knee jerk, if something hits the knee it moves. Pupil constriction, pupils constrict when light is shone.

5 of 7

What is the reflex arc?

How the electrical impulse travels from a receptor to an effector

6 of 7

Describe the path an electrical impulse travels through for a reflex action

Starts with a recepor detecting stomulus, then travels through synapse to sensory neurone and then reaches relay in CNS via spinal cord. Transmitted to motor neurone then effector, either muscle or gland.

7 of 7

Other cards in this set