Would the answer to question #9 be 3 or 5? 9. In the figure on the right, how ma

Question

Would the answer to question #9 be 3 or 5? 9. In the figure on the right, how many separate current pulses pus cause the membrane potential to reach the threshold? pales b. 2 d. 5 e. -90 10, which of the following is not one of the likely factors affecting the various velocities at which axons conduct action potentials? a. Myelination d. Diameter b. Temperature e. None of these; all are likely factors 11. Neurons that relay sensory signals to integrative centers of the CNS are called a. interneurons. b. synaptic neurons. c. efferent neurons. afferent neurons. e.motor neurons 12. A decrease in the absolute value of the membrane potential toward zero is called @depolarization. b.an action potential. c. hyperpolarization. d.a membrane potential. e. voltage. 13. The transmission of a signal at the vertebrate skeletal neuromuscular junction consists of the following steps: 1. Chemically regulated ion channels on the postsynaptic membrane are activated. Calcium ions enter the presynaptic ceil. 3. An action potential depolarizes the presynaptic membrane. 4 Acetylcholine isreleased from the pressna pic neuron anexocytosis.- aur, 5. Acetylcholine binds to receptors on the postsynaptic membrane. What is the correct sequence of these events? a. 4-2-1-5-3 b. 2-4-1-3-5 c. 1-2-3-4-5 2-4-5-1 e. 2-5-4-1-3 14. Escape from a predator might require nearly instantaneous, reflexive neuronal reaction. Such a response is most likely to be mediated by a. metabotropic synapses d. ionotropic synapses b electrical synapses c. mEPSPs e none of these 15. Two sets of axons carry stimuli near the axon hillock. One set produces an IPSP and the other set produces an EPSP. If both sets produce action potentials at the same time, what is the likely effect at the axon hillock? a. There will be a hyperpolarization.

Explanation / Answer

answer to question 9 should be 5, because as you can see in the lower graph, the threshold value is crossed by total of 5 times and the same is asked in the question. Thank you.

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