Podcast
Questions and Answers
What is the purpose of the refractory period in neurons?
What is the purpose of the refractory period in neurons?
- To allow neurotransmitter to be made in the postsynaptic neurone
- To ensure an action potential can only pass in one direction (correct)
- To prevent the movement of action potentials
- To amplify the effects of low frequency action potentials
Which principle states that an action potential is either produced or not, with all action potentials being of the same strength?
Which principle states that an action potential is either produced or not, with all action potentials being of the same strength?
- Threshold principle
- Discrete signal principle
- Synaptic transmission principle
- All-or-nothing principle (correct)
How do synapses prevent action potentials from going in the wrong direction?
How do synapses prevent action potentials from going in the wrong direction?
- By making neurotransmitter in the postsynaptic neurone
- By having neurotransmitter made only in the presynaptic neurone (correct)
- By having receptors only on the presynaptic neurone
- By releasing neurotransmitter many times in the postsynaptic neurone
What is summation in synaptic transmission?
What is summation in synaptic transmission?
What is a role of excitatory synapses?
What is a role of excitatory synapses?
In synaptic transmission, what can spatial summation involve?
In synaptic transmission, what can spatial summation involve?
What is the function of rod cells in the eye?
What is the function of rod cells in the eye?
Which region of the heart is referred to as the pacemaker?
Which region of the heart is referred to as the pacemaker?
Why do ventricles start contracting after the atria in the heart?
Why do ventricles start contracting after the atria in the heart?
What is the role of the bundle of His in heart conduction?
What is the role of the bundle of His in heart conduction?
Which part of a nerve reflex arc is responsible for transferring signals from one neuron to another?
Which part of a nerve reflex arc is responsible for transferring signals from one neuron to another?
What is responsible for the myogenic nature of the heart's contraction?
What is responsible for the myogenic nature of the heart's contraction?
What is the correct sequence of components in a general reflex arc?
What is the correct sequence of components in a general reflex arc?
What is the role of an Intermediate Neurone in a reflex arc?
What is the role of an Intermediate Neurone in a reflex arc?
Which type of receptor detects changes in light?
Which type of receptor detects changes in light?
Where are Pacinian Corpuscles mostly found in the body?
Where are Pacinian Corpuscles mostly found in the body?
What happens to stretch mediated sodium channels in a Pacinian Corpuscle under pressure?
What happens to stretch mediated sodium channels in a Pacinian Corpuscle under pressure?
Which part of a simple reflex arc carries the nerve impulse from the spinal cord to the effector?
Which part of a simple reflex arc carries the nerve impulse from the spinal cord to the effector?
