Neural Inhibition and Synaptic Transmission Quiz

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Which type of inhibition serves to limit the excitability of motor neurons?

Tonic inhibition
Feedforward inhibition
Feedback inhibition (correct)
Lateral inhibition

What is the primary significance of synaptic inhibition?

It enhances the excitability of neurons and muscles
It restricts the ability of neurons and muscles to react properly and appropriately (correct)
It has no significant impact on neuronal and muscular function
It allows for the uncontrolled activation of neurons and muscles

Which of the following is a property of synaptic transmission?

Bidirectional conduction
Synaptic facilitation
Synaptic summation (correct)
All of the above

What is the primary significance of the one-way conduction law (Bell-Magendie law) in synaptic transmission?

It ensures the orderly conduction of impulses in a single direction (A) Signup and view all the answers

What is the primary cause of the synaptic delay observed in synaptic transmission?

All of the above (D) Signup and view all the answers

What is the purpose of the convergence phenomenon in synaptic transmission?

To allow for the summation of signals from multiple presynaptic terminals (B) Signup and view all the answers

Which of the following is the primary function of the pre-synaptic membrane?

To facilitate the release of neurotransmitters into the synaptic cleft (C) Signup and view all the answers

What is the primary mechanism by which synaptic inhibition regulates neuronal activity?

By hyperpolarizing the post-synaptic membrane and reducing the likelihood of an action potential (D) Signup and view all the answers

What is the primary significance of the one-way conduction of action potentials in synaptic transmission?

It prevents the back-propagation of action potentials from the post-synaptic neuron to the pre-synaptic neuron (B) Signup and view all the answers

What is the primary purpose of feedback inhibition in synaptic transmission?

To prevent the depletion of neurotransmitters in the pre-synaptic neuron (C) Signup and view all the answers

Which of the following is a key property of synaptic transmission that allows for the integration of multiple inputs?

The ability to release neurotransmitters in a graded manner (C) Signup and view all the answers

What is the primary mechanism by which drugs can modulate synaptic transmission?

By interfering with the synthesis or release of neurotransmitters from the pre-synaptic neuron (D) Signup and view all the answers

What is the main function of the presynaptic vesicular grid?

Storage of neurotransmitters (A) Signup and view all the answers

Which type of receptor proteins in the postsynaptic membrane are responsible for activating cellular genes?

Enzymatic receptor proteins (A) Signup and view all the answers

In chemical synapse Type I, what is a distinguishing characteristic of the synaptic cleft compared to Type II?

Wider synaptic cleft (C) Signup and view all the answers

What is the effect of neurotransmitter GABA at a synapse?

Inhibitory effect (A) Signup and view all the answers

When a nerve impulse reaches the nerve terminal, what triggers the release of neurotransmitters?

Voltage-gated Ca channels opening (D) Signup and view all the answers

What is the process involved in developing EPSP and IPSP upon reception of neurotransmitters?

Action potential development (D) Signup and view all the answers