Many human actions are rapid and automatic, occurring without conscious thought. These are known as reflex actions.
Which two of the following actions are examples of reflex actions?
- Shivering when core body temperature drops
- Coughing when food accidentally enters the trachea
- Choosing to put on a jacket when feeling cold
- Swerving a bicycle to avoid a puddle
- Concentrating on reading a sign in the distance
The figure below shows how the size of the pupil of the human eye can change by reflex action from State A A\,A to State BBB.
Name one stimulus that would cause the pupil to change in size from State A A\,A to State BBB.
Structure Q Q\,Q causes the change in pupil size. Name Structure QQQ.
Describe how Structure Q Q\,Q causes the change in the size of the pupil from State A A\,A to State BBB.
A person accidentally steps barefoot on a sharp stone and immediately pulls their foot away in a rapid reflex action.
Describe how the receptor, the three neurones (sensory, relay, and motor), the synapses, and the effector work together to coordinate this reflex response.