Back to the full dot-point answer
WAHuman BiologyQuick questions
Unit 3: Homeostasis and Disease
Quick questions on The nervous system: WACE Year 12 Human Biology Unit 3
1short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the reflex arc?Show answer
A reflex is a rapid, automatic, involuntary response that protects the body, for example pulling your hand off a hot object before you feel pain. The reflex arc is the pathway: a receptor detects the stimulus, a sensory neuron carries the impulse to the spinal cord, an interneuron in the spinal cord relays it, a motor neuron carries the impulse to the effector, and the effector (a muscle) produces the response. Because the signal acts at the spinal cord without waiting for the brain, the response is very fast; the brain is informed afterwards.
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.