Important McQs related to neurons?

1. What is the basic structural and functional unit of the nervous system?
2. What are the three main parts of a neuron and their functions?
3. What is the role of neurotransmitters in neuronal communication?
4. What is the difference between a sensory neuron, motor neuron, and interneuron?
5. How do neurons generate and transmit electrical signals?
6. What is the significance of the myelin sheath in neuronal function?
7. What is the difference between an action potential and a resting potential in a neuron?
8. How do neurons communicate with each other at synapses?
9. What are the main types of neurotransmitters and their functions in the nervous system?
10. How do drugs and toxins affect neuronal function and communication?

Structure of Neurons

- Which part of the neuron is responsible for receiving stimuli and transmitting signals to the cell body?
- (a) Dendrites
- (b) Axon
- (c) Soma
- (d) Myelin sheath
- What is the name of the insulating layer that surrounds some axons?
- (a) Neurilemma
- (b) Myelin sheath
- (c) Node of Ranvier
- (d) Synaptic cleft

Electrical Signaling in Neurons

- Which ion channel is responsible for generating the action potential?
- (a) Sodium channel
- (b) Potassium channel
- (c) Calcium channel
- (d) Chloride channel
- What is the threshold potential of a neuron?
- (a) The voltage at which the action potential is triggered
- (b) The voltage at which the action potential ends
- (c) The voltage at which the resting potential is maintained
- (d) The voltage at which the neuron fires spontaneously

Chemical Signaling at Synapses

- What is the name of the neurotransmitter released by excitatory neurons?
- (a) Glutamate
- (b) GABA
- (c) Serotonin
- (d) Dopamine
- What is the role of the synaptic cleft in neuronal communication?
- (a) To prevent the spread of electrical signals
- (b) To facilitate the diffusion of neurotransmitters
- (c) To amplify the signal
- (d) To inhibit the postsynaptic neuron

Neural Communication

- What is the name of the process by which neurons communicate with each other?
- (a) Synaptic transmission
- (b) Action potential propagation
- (c) Neurogenesis
- (d) Dendritic integration
- Which type of synapse is responsible for inhibiting postsynaptic neurons?
- (a) Excitatory synapse
- (b) Inhibitory synapse
- (c) Chemical synapse
- (d) Electrical synapse

Physiology of Neurons

- What is the resting potential of a typical neuron?
- (a) -70 mV
- (b) +70 mV
- (c) 0 mV
- (d) -100 mV
- Which ion pump is responsible for maintaining the resting potential?
- (a) Sodium-potassium pump
- (b) Calcium pump
- (c) Chloride pump
- (d) Hydrogen pump