The human body contains a large number of cells neurons which are very long and branched, and look like electric wires. The longest branch of this cell is axon whereas there are many small branches called dendrites. Any two nerve cells do not join to one another completely in the human body. There is a microscopic gap synapse between every pair of adjacent nerve cells through which electric impulses can pass by the release of a chemical substance. Read the above paragraph and answer the questions that follows :
1. Electrical impulse travels in a neuron from :
(i) Dendrite, axon, axon end, cell body
(ii) Cell body, dendrite, axon, axon end
(iii) Dendrite, cell body, axon, axon end
(iv) Axon end, axon, cell body, dendrite
2. In a synapse, chemical signal is transmitted from :
(i) Axon to cell body of the same neuron
(ii) Cell body to axon end of the same neuron
(iii) Dendrite end of one neuron to axon end of adjacent neuron
(iv) Axon end of one neuron to dendrite end of adjacent neuron
3. In a neuron, the conversion of electrical signal to a chemical signal occurs at/in
(i) Dendrite end
(ii) Cell body
(iii) Axon end
(iv) Myelin sheath
4. Neurons are of ____ types.
(i) 1
(ii) 2
(iii) 3
(iv) 4
5. The function between two adjacent neurons is called
(i) Nerve junction
(ii) Sensory junction
(iii) Synapse
(iv) Neuro-muscular joint
