Biology
Answer
| Reflex Action | Voluntary Action |
|---|---|
| Initiated by some stimulus (touch, pain, pressure, heat, light) | Initiated by a willing thought. |
| Mainly self-protective due to environment. | Fulfilment of a desired goal. |
| Commands originate mostly in the spinal cord and autonomic nervous system and a few in the brain as well. | Commands originate in brain. |
| Involve muscles and glands. | Involve only muscles. |
Related Questions
Give reason:
The brain and the spinal cord are referred to as the central nervous system.
Give reason:
Neurotransmitters are broken down by an enzyme just after passing an impulse from one neuron to the other.
Two hungry boys (A and B) enter a restaurant and see the menu. Boy B starts salivating but not A. Explain the reason for this difference.
The diagram alongside shows a section of the human brain and its associated parts. Answer the questions that follow:
(a) Name the parts labelled 1, 2, 3 and 4.
(b) Name the protective membranous covering of the brain. Also mention its three layers.
(c) Name the basic unit of the brain.
(d) Write the important role of the part mentioned as 2.