Neuron Sx.
This is the end of the neuron that receives a stimulus.
What are the dendrites?
This is the name of the space between the axon terminal of the sending cell and the dendrites of a receiving cell.
What is the synapse/synaptic cleft?
This is the phase where the neuron is not sending a signal and has a membrane potential of -70 mV.
What is resting potential?
These are the two main divisions of the PNS.
What are the sensory and motor divisions?
These are the two main ions involved in neuron communication.
What are sodium and potassium?
This surrounds the axon of a neuron and makes the nerve impulses faster.
What is the myelin sheath?
This ion is needed for vesicles to release their neurotransmitters into the synapse.
What is calcium?
This is the period when a neuron is resetting to resting potential. The neuron cannot send another action potential at this time.
What is the refractory period?
This type of neuron carries messages towards the brain in response to taste, touch or smell, etc.
What are sensory neurons?
This type of nervous system cell forms the myelin sheath, provides nutrients and oxygen to the neurons, and provide a structure on which neurons can sit.
What are glial cells?
Neurotransmitters are stored in this part of the neuron.
What is the axon terminal?
This chemical signal between neurons can be excitatory or inhibitory.
What are neurotransmitters?
This is the phase where the action potential is being sent down the axon. Sodium ions are flooding into the cell.
What is depolarization?
Skeletal muscles are under the control of this part of the PNS under our conscious control.
What is the somatic nervous system?
Acetylcholine is a neurotransmitter that stimulates this...
What is muscle contraction?
This electrical impulse is sent down the axon of a neuron.
What is an action potential?
When neurotransmitters are released into the synapse, they cross and bind to these.
What are protein receptors on the dendrites?
This is the phase when too much K+ has left the cell and the membrane potential decreases to -75 mV.
What is hyperpolarization?
Nerve impulses are sent to slow the diaphragm's rate of breathing. The nerve fibers sending these signals will most likely belong to which division of the nervous system?
What is the autonomic nervous division?
What type of motor neurons do you use when you raise your hands up to catch a ball?
What are somatic neurons?
This is a bundle of neuron axons bound together.
What is a nerve?
When the dendrites bind to protein receptors on the dendrites this is stimulated on the receiving cell.
What is an action potential?
How do ions enter and leave the neuron?
Each action potential occurs with the same changes in membrane potential. This is how the brain differentiates between an elephant or a spider standing on your foot.
What is the frequency of action potentials?
When a neurotransmitter like acetylcholine is acting in an excitatory manner, which of the following is likely a result of the acetylcholine acting on the postsynaptic cell?
What is sodium ions would flood the cell?