Musculoskeletal: Intro to the Nervous System (Nerve Conduction - Actio
Potentials and Synapses)
1. *** Where does the action potential travel along the neuron?: Axon
2. *** What is the electrical gradient established in the unstimulated neuron?-
: Resting membrane potential
3. What is the 1st event that stops the continued depolarization of the neuron during an action
potential?: Opening of voltage-gated channels/closing of Na+ voltage-gated channels
4. Surrounds nucleus, synthesized neurotransmitters: soma/cell body
5. marks origin of axon from soma; releases signal down axon once threshold reached: axon
hillock
6. receive signals from other neurons/receptors; radiate from soma: dendrites
7. transmits signals away from soma; can be myelinated; ends in AXON TER- MINALS aka
TERMINAL BOUTONS that connect and send signal to other neurons via neurotransmitters:
axon
8. How do neurons communicate?: via electrochemical signals:
- GRADED POTENTIALS & ACTION POTENTIALS
9. short distance lengths: graded potentials
10.longer distance signals (aka nerve impulses): action potentials
11.For potentials to be formed, the plasma membrane of a neuron must have:: ion
channels & resting membrane potential
1/8
, Musculoskeletal: Intro to the Nervous System (Nerve Conduction - Actio
Potentials and Synapses)
12.Action potentials: longer distance signals (aka nerve impulse)
13.Graded potentials: short distance signals
14.The flow of ions through ion channels in the plasma membrane occurs from area of to
concentration: high --> low concentration
15. have electrical charge, and as they flow through the ion channels in the plasma
membrane, the flow of electrical charge (current) changes the membrane potential of the
neuron: Ions
16.The ion channels open and close their for ions to flow in response to
different types of stimuli: "gates"
17.What type of ion channel opens and closes randomly and doesn't require stimuli?: Leakage
channels
18.Which ion channel has neuron plasma membranes that are more perme- able to K+ ions
than Na+ ions?: Leakage channels
19.Which ion channel opens when neurotransmitters and hormones bind to them?: Ligand-
gated channels
* specific ions can then flow across membranes
20. Open in response to mechanical forces (e.g., vibration, pressure, stretch). Tension in
surrounding tissues cause channels to open and ions flow
Ex: stretch receptors in skin: Mechanically gated channels
2/8
Potentials and Synapses)
1. *** Where does the action potential travel along the neuron?: Axon
2. *** What is the electrical gradient established in the unstimulated neuron?-
: Resting membrane potential
3. What is the 1st event that stops the continued depolarization of the neuron during an action
potential?: Opening of voltage-gated channels/closing of Na+ voltage-gated channels
4. Surrounds nucleus, synthesized neurotransmitters: soma/cell body
5. marks origin of axon from soma; releases signal down axon once threshold reached: axon
hillock
6. receive signals from other neurons/receptors; radiate from soma: dendrites
7. transmits signals away from soma; can be myelinated; ends in AXON TER- MINALS aka
TERMINAL BOUTONS that connect and send signal to other neurons via neurotransmitters:
axon
8. How do neurons communicate?: via electrochemical signals:
- GRADED POTENTIALS & ACTION POTENTIALS
9. short distance lengths: graded potentials
10.longer distance signals (aka nerve impulses): action potentials
11.For potentials to be formed, the plasma membrane of a neuron must have:: ion
channels & resting membrane potential
1/8
, Musculoskeletal: Intro to the Nervous System (Nerve Conduction - Actio
Potentials and Synapses)
12.Action potentials: longer distance signals (aka nerve impulse)
13.Graded potentials: short distance signals
14.The flow of ions through ion channels in the plasma membrane occurs from area of to
concentration: high --> low concentration
15. have electrical charge, and as they flow through the ion channels in the plasma
membrane, the flow of electrical charge (current) changes the membrane potential of the
neuron: Ions
16.The ion channels open and close their for ions to flow in response to
different types of stimuli: "gates"
17.What type of ion channel opens and closes randomly and doesn't require stimuli?: Leakage
channels
18.Which ion channel has neuron plasma membranes that are more perme- able to K+ ions
than Na+ ions?: Leakage channels
19.Which ion channel opens when neurotransmitters and hormones bind to them?: Ligand-
gated channels
* specific ions can then flow across membranes
20. Open in response to mechanical forces (e.g., vibration, pressure, stretch). Tension in
surrounding tissues cause channels to open and ions flow
Ex: stretch receptors in skin: Mechanically gated channels
2/8
