Which would INCREASE the likelihood of an action potential occurring in a postsynaptic cell? closing of sodium channels on the postsynaptic cell presynaptic inhibition at an excitatory synapse presynaptic excitation at an excitatory synapse opening of potassium channels on the postsynaptic cell
Added by Remedios R.
Close
Step 1
Step 1: The likelihood of an action potential occurring in a postsynaptic cell is increased when there is depolarization of the cell membrane, which brings the membrane potential closer to the threshold for firing an action potential. Show more…
Show all steps
Your feedback will help us improve your experience
Pahal S and 81 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
What occurs in an excitatory synapse? Binding of neurotransmitter to the receptor opens sodium channels allowing sodium ions to enter and increasing the likelihood that an action potential will begin in the postsynaptic cell. Binding of the neurotransmitter to the receptor opens potassium channels allowing potassium ions to enter and increasing the likelihood that an action potential will begin in the postsynaptic cell. Binding of the neurotransmitter opens different ion channels that decreases the likelihood that an action potential will be generated to the postsynaptic neuron. Binding of neurotransmitter to the receptor closes sodium channels allowing potassium ions to enter and increasing the likelihood that an action potential will begin in the postsynaptic cell. Binding of the neurotransmitter to potassium allows sodium ions to enter and increases the likelihood that an action potential will be generated in the postsynaptic cell.
Pahal S.
Presynaptic facilitation would occur if: Sodium (Na+) channels were opened on the axon terminal buttons of the postsynaptic cell Potassium (K+) channels were opened on the dendrites of the postsynaptic cell Potassium (K+) channels were opened on the terminal buttons of the postsynaptic cell Sodium (Na+) channels were opened on the dendrites of the postsynaptic cell
Supreeta N.
Ordinarily, the beginning of a neuron's axon (near the cell body) is activated before any other part of the axon, so a wave of action potentials occurs as sodium channels open in the direction of the synaptic terminal. What would happen if you artificially stimulated an axon to reach threshold potential midway along its length, rather than at the connection with the cell body?
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD