Quiz Questions Flashcards
Which of the following is a neurotransmitter that results in hyperpolarization of the alpha motor neuron?
Glutamate.
Acetylcholine.
Leucine.
Glycine.
Glycine
Any inhibitory neurotransmitter is bringing the cell into a temporary hyper polarized state.
In order for an action potential to occur:
Hydrophobic bonds must form between actin and myosin
Ca++ must be released by the terminal axon
Na+ conductance must increase
Ca++ must be released from the sarcoplasmic reticulum
Na + must flood into the cell.
The amplitude of the action potential of a given neuron is:
larger in response to depolarizing currents of greater magnitude.
always the same.
related to the number of synapses on the neuron.
smaller if the resting potential of the neuron is lower.
Always the same, “All or None Principle”
There will either be a full response or no response at all for an individual neuron or muscle fiber.
What does the “Active Zone” refer to as?
The pre-synaptic membrane responsible for releasing neurotransmitter
What is a Connexin?
The individual component of the protein connecting two cells in an electrical synapse
If a Patch Clamp experiment was able to evaluate the activity of 10 sodium channels, what would be the approximate inward current detected?
20pA (it doubles)
The Motor Unit refers to:
The Motor Neurone and all he muscle fibres it innervates
The secondary synaptic cleft refers to:
The gap between a motor neuron terminal and the region within junctional folds.
The chemical synapse that gets activated in case a primary synaptic cleft communication fails.
The gap between a motor neuron terminal and the closest portion of the post-synaptic membrane.
Incorrect Response
The gap between the walls inside a junctional fold.
The gap between a motor neuron terminal and the region within junctional folds.
The electrical synapse
Has a more narrow gap than the chemical synapse
Which of the events happens in G-protein activation?
Increasing or decreasing metabolic pathways
Activation potassium channels in Neuron
Modulation of Action Potentials Frequency in Neurons
What is a somatosensory neuron?
The somatosensory first-order (1°) afferent is a pseudounipolar neuron, which has a single process that divides into a peripheral process and a central process
