CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following statements are incorrect?
(i) When an impulse travels along a myelinated neuron, it leaps over the myelin sheath from one node to the next.
(ii) At chemical synapse there is continuity between the presynaptic and postsynaptic neurons provided by the gap junctions.
(iii) Neurotransmitters are chemicals that are released from postsynaptic neuron which interact with specific receptors of presynaptic neuron.
(iv) Neurons releasing acetylcholine are described as cholinergic neurons and those releasing noradrenaline are described as adrenergic neurons.
(v) Refractory period is the period after the transmission of an impulse in a nerve fibre in which membrane of the axon regains its ability to transit impulses.

A
(i), (ii) and (iv)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
(ii) and (iv)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
(ii) and (iii)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
(i), (iii) and (v)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C (ii) and (iii)
At chemical synapse, one neuron sends a message to a target neuron - another cell. An action potential triggers the presynaptic neuron to release neurotransmitters. These molecule bind to the receptors on the postsynaptic cell and make it more or less likely to fire an action potential.
Neurotransmitter are chemical messengers that transmit a message from a nerve cell across the synapse to a target cell. They are chemicals made by the nerve cell specifically to transmit the message.
So, option C is the correct option.

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
The Neuron
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon