What factors determine how fast an action potential will travel along an axon?
What factors determine how fast an action potential will travel along an axon?
Describe briefly how myelination of the axon speeds up the conduction of the action potential. What is the molecular process that is altered? Maximum number of characters (including HTML tags added by text editor): 32,000 Show RichText Editor and character count) 1
What is the relationship between the arrival of an action potential (nerve impulse) at the axon terminal and exocytosis of neurotransmitters?
Explain what will happen in an axon undergoing an action potential but which is unable to utilize monosaccharides for cellular respiration.
neuronal action potential reaches the axon terminal of neuron _______ are released from the axon terminal by ______ _______ diffuse across the _______ _______ and bind to ______ on the postsynaptic membrane of neuron, 2) generating an excitatory local potential, if the neuron is stimulated enough time, the excitatory local potentials _______ and spread through the neuron's plasma membrane toward the axon, when the trigger zone is deploarized to ______, an ______ is generated
Describe the events of an action potential is conducted down the membrane of an axon and how it is transmitted to another cell across a synapse causing an IPSP or an EPSP.
The resting membrane potential of a neuronal axon is -70 mV. When an action potential is triggered, Na+ ions move into the axon, which reverses the voltage, bringing it towards 0 mV. Which of the following is the correct term for this sequence of events? a. Repolarization b. Hyperpolarization c. Depolarization d. Hypopolarization e. Isopolarization
If necessary, refer to Animation: Chemical Synapses. When an action potential reaches the axon terminal: sodium ions are released from the axon terminal, enter the cell body of the postsynaptic neuron through its sodium channels, and may initiate an action potential in that neuron. neurotransmitter molecules are released from the axon terminal and bind to receptors on the postsynaptic neuron, causing either an inhibitory hyperpolarization or an excitatory depolarization. neurotransmitter molecules are released from the axon terminal, bind to and...
The action potential travels down: A. the dendrite. B. the synapse. C. the axon. D. both the dendrite and axon.
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Q3. (1 mark) If an axon had a conduction velocity of 115 m/sec what two structural features would it have if it was viewed using a transmission electron microscope? Q4. (1 mark) If an axon had a conduction velocity of 115 m/s how long would it take for an action potential to travel along this axon if it was 1520 mm long? Show your calculation.
Period. DLDE How d graded current is different from an action potential. Make sure you think about: evenirea D Percom • Where in a neuron these take place and the direction they travel. • How does the strength of the signals change as it travels • Explain any differences in the velocity (how fast) of travel 56. Describe the 3 classifications of axons based on size and velocity of propagation. 57. The release of a neurotransmitter is dependent on what...