Nervous System — Part 2: Voluntary, involuntary and reflex actions: visual lesson, ICSE Class 10 Biology (Science Paper 3)

Lesson

Actions and Reflexes

Part 2 — the actions we choose, and the ones that happen by themselves.

In this lesson you will

Concept

Table of voluntary, involuntary and reflex actions, what controls them and examples
Action	Controlled by	Examples
Voluntary	Cerebrum, at will	Writing, walking, speaking
Involuntary	Medulla and autonomic system	Heartbeat, breathing, peristalsis
Reflex	Spinal cord or brain, automatically	Knee-jerk, sneezing, withdrawing the hand

Check your understanding

A reflex action is…

Multiple choice1 mark

A reflex action is