Final Flashcards
Potential energy is defined as a form of stored energy (True/False)
True
When the charge is different on both sides of the cell membrane a cell is said to be:
Polarized
What is the average resting membrane potential?
Average RMP is -70mv
What happens to Gated ion channels when they are stimulated by mechanical stimuli, electrical stimuli, chemical stimuli (e.g., neurotransmitters) or light stimuli?
The gates open
When all of the electrically gated Na+ channels open at the trigger zone and the electrical depolarization begins an action potential, this is known as:
Threshold stimulus
For the question above, what is the millivolt level at which this phenomenon occurs?
-55mv
What two (2) factors can influence the speed of the action potential down the axon?
Myelin
The largest diameter axons are which type of axons?
Type A
Action potentials travel in two directions. (True/False)
False
What type of conduction occurs at the neurofibril node and jumps from one node to the next?
Saltatory Conduction
What are the two phases of an action potential?
Depolarization and Repolarization
What is the area where two neurons meet, a neuron meets a muscle or a gland called?
A Synapse is a place where two neurons can meet.
Regarding the answer to question #1, what are the two types
1) Electrical synapse
2) Chemical synapse
What type of structure is one where the axon of pre-synaptic connects to soma of a post-synaptic neuron?
Axosomatic
The neuron before the synaptic cleft, that releases neurotransmitter in the synaptic cleft is called the ________________________.
Pre-synaptic neuron
The pre-synaptic neuron carries a nerve impulse away from a synapse. (True/False)
False
The pre-synaptic neuron releases chemical messengers called hormones. (True/False)
False
What is the most common excitatory neurotransmitter in the brain?
Glutamate