Some steps related to the transmission of information through the nervous system are given in the table below. The steps are not in the correct order. Write numbers 1 to 10 in the first column to get the correct order of steps involved:
S.No.
Description of the Step
1.
Stimulus provides the information.
2.
The electrical impulse travels along the dendrite.
3.
An electrical impulse is created at the dendrite.
4.
Information is acquired at the end of the dendrite tip of the nerve cell.
5.
The electrical impulse travels from the cell body to axon to the end of an axon.
6.
The chemicals cross the synapse and reach the dendrite of the next neuron.
7.
The information sets off a chemical reaction.
8.
The electrical impulse travels from dendrite to the cell body.
9.
The chemicals start a similar electrical impulse in the dendrite of the next neuron.
10.
At the end of the axon, the electrical impulse sets off the release of some chemicals.
Important Questions on Control and Coordination
In a neuron, conversion of an electrical signal to a chemical signal occurs at/ in
Which of the following statements are true?
(i) Sudden action in response to something in the environment is called reflex action.
(ii) Sensory neurons carry signals from the spinal cord to muscles.
(iii) Motor neurons carry signals from receptors to the spinal cord.
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called the reflex arc.
Which of the following statements are true about the brain?
(i) The main thinking part of brain is hindbrain.
(ii) Centres of hearing, smell, memory, sight, etc., are located in forebrain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.
(iv) The cerebellum does not control the posture and balance of the body.
