A medical student was studying the passive membraneproperties of neurons and their ability to affect the amplitudeof an EPSP recorded from the neuron. She found that inone neuron, applying two stimuli separated by 25 ms to onepresynaptic input induced two EPSPs of identical amplitude. Ina second neuron, the same type of stimulation induced an EPSPfollowed an action potential. What can she conclude from thisexperiment?A. The second neuron had a longer time constant than the firstneuron.B. The second neuron had a shorter time constant than the firstneuron.C. The second neuron had a longer length constant than the firstneuron.D. The second neuron had a shorter length constant than thefirst neuron

Which statement about EPSPs in the central nervous system is true?Group of answer choicesThey are much larger than end plate potentials.the istance between inputs does not affect the ability of EPSPs to summatethe time between inputs does not affect the ability of EPSPs to summateTheir effect in the central nervous system can be nullified by IPSPs.They can be hyperpolarizing.

If both IPSP's and EPSP's stimulate the same postsynaptic cell, which of the following is true?   Multiple choice question.The postsynaptic cell will likely never fire because of the conflicting input.The response of the postsynaptic cell depends on which type of graded potential has a larger effect.Only one of the stimulus types determines the effect in the postsynaptic cell

An excitatory postsynaptic potential (EPSP) occurs when neurotransmitters bind to their receptors and open chemically-gated ______ channels.Multiple choice question.sodiumpotassiumcalciummagnesium

A medical student is studying transmission through autonomicganglia. She studied the effects of two drugs on the activityof a postganglionic neuron. Drug A induced an EPSP in thepostganglionic neuron, and drug B blocked the EPSP producedby electrical stimulation of a preganglionic nerve. Drugs A and Bmight be the following drugs, respectively.A. Glutamate and glycineB. Nicotine and atropineC. Strychnine and atenololD. Nicotine and trimethaphanE. Acetylcholine and phenylephrine

Which of the following features is shared by a spinal sensory neuron and a spinal motor neuron?  their action potentials use voltage-gated sodium channels to propagate along their axons   they both have extensive dendritic trees   they are both activated by excitatory post-synaptic potentials (EPSPs)   they both conduction action potentials in the same direction in peripheral nerves   they both have action potentials that initiate at the axon hillock