.... For the remaining questions, the following scenario applies. You might want to draw it. Both neuron X and neuron Y are pre-synaptic to neuron Z. Neuron X secretes a neurotransmitter that opens sodium ion channels. Neuron Y secretes a neurotransmitter that opens potassium ion channels. Answer the following questions in the order given. The neurotransmitter from neuron X will neuron Z and is O depolarize, excitatory O hyperpolarize, excitatory O depolarize, inhibitory O hyperpolarize, inhibitory QUESTION 17 The neurotransmitter from neuron Y will neuron Z and is O depolarize, inhibitory depolarize, excitatory O hyperpolarize, excitatory O hyperpolarize, inhibitory QUESTION 18 Click Save and Submit to save and submit. Click Save All Answers to save all answers. 58 130 13 08 F3 000 000 F1 F2 F4 F5 95

.... For the remaining questions, the following scenario applies. You might want to draw it. Both neuron X and neuron Y are pre-synaptic to neuron Z. Neuron X secretes a neurotransmitter that opens sodium ion channels. Neuron Y secretes a neurotransmitter that opens potassium ion channels. Answer the following questions in the order given. The neurotransmitter from neuron X will neuron Z and is O depolarize, excitatory O hyperpolarize, excitatory O depolarize, inhibitory O hyperpolarize, inhibitory QUESTION 17 The neurotransmitter from neuron Y will neuron Z and is O depolarize, inhibitory depolarize, excitatory O hyperpolarize, excitatory O hyperpolarize, inhibitory QUESTION 18 Click Save and Submit to save and submit. Click Save All Answers to save all answers. 58 130 13 08 F3 000 000 F1 F2 F4 F5 95

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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For this question you may use either a neuron or a skeletal muscle fiber (but not both) to answer. In words and/or figures, describe how the binding of a neurontransmitter to its receptor eventually leads to a mechanical event (neurotransmitter release or skeletal muscle contraction). In other words, describe the steps involved in either muscle contraction or nerve conduction. Remember: You may either 1) type your answer here, 2) type in a separate file and upload the file here with or without additional images or 3) write your answer on a separate sheet of paper, scan or screenshot an image of your response and upload the file here.
For the nervous system to convey information using electrical signals, the signals typically must be passed from one neuron to another. Oftentimes, this transfer of information across the synapse occurs via the release of neurotransmitters from the pre-synaptic terminal. When a large stimulus is detected in one neuron, it often conveys this information by releasing a larger amount of neurotransmitter into the synapse.
Assume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an ionotropic excitatory neurotransmitter receptor causing an EPSP. Step 2: With the neurotransmitter still bound either a NAM or non-competitive antagonist bind to the allosteric site of the receptor. Answer the following questions that explains how the NAM and non-competitive antagonist would differ in their actions. 4.) A. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the NAM. B. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the non-competitive antagonist. C. Going from step 1 to step 2 how would membrane potential change as a result of the NAM D. Going from step 1 to step 2 how would the membrane potential change as a result of the non-competitive antagonist.
Neuron 1 fires an action potential, releasing neurotransmitters to neuron 2. However, neuron 2 does not fire an action potential itself. Use your understanding of neuronal signaling to identify and explain two possible reasons for this observation.
Organophosphate pesticides inhibit the action of acetylcholinesterase. What effect does this have in the cell? Select one: a. It prevents synthesis of ACh in the presynaptic terminal causing less neurotransmitter release b. It prevents breakdown of ACh in the synapse causing increased activity at the postsynaptic cell c. It prevents reuptake of ACh into the presynaptic terminal causing increased activity at the postsynaptic cell d. It prevents binding of ACh on the postsynaptic cell causing less activity e. It prevents reuptake of ACh into the presynaptic terminal causing less neurotransmitter synthesis.
If a post synaptic neuron is stimulated to threshold by spatial summation this implies that Select one: a. the post synaptic cell has many voltage gated ion channels b. the post synaptic cell has a lower than normal threshold c. the post synaptic cell is slow to repolarize d. the post synaptic cell is synapsing with multiple presynaptic neurons
Which of the following situations in a neuron results in action potentials that have extended depolarization phases? O None of these result in extended depolarization phase. O Compromising the inactivation mechanism in voltage-gated Na* channels. O Stimulating the voltage-gated K* channels. O Inhibiting the voltage-gated Na* channels. O Compromising the inactivation mechanism in voltage-gated K* channels.
Neurotransmitters, the chemicals used in signaling across synapses, can be either re-absorbed by the pre-synaptic neuron OR hydrolyzed after release by enzymes. Acetylcholine (ACh), the neurotransmitter at neuromuscular junctions, is broken down by the enzyme acetylcholinesterase (AChE) and then its component parts are re-absorbed. Sarin gas is an extremely dangerous neurotoxin that has been utilized in terrorism and chemical warfare. It is known as a "nerve gas" because it blocks AChE. Based on your understanding of the neuromuscular junction and hydrolitic enzymes, hypothesize how sarin gas le ads to paralysis and nerve damage in the people to whom it is exposed.
One medication used to manage the symptoms of Alzheimer's disease is a cholinesterase inhibitor. The medication helps to improve brain functioning and memory. 1.What is the function of cholinesterase in the synapse? 2. How does a cholinesterase inhibitor work in a synapse? 3. Explain the function of cholinesterase inhibitor in increasing brain functioning and memory. Please include the URL of the website that you used to answer these questions.
Correct answer: Ligand-gated ion channel don’t open until the neurotransmitter diffuses across the synapse and binds to the receptor, The calcium channels are blocked in the presynaptic cells, It takes time for the vesicular exocytosis to occur Please explain why each of the correct answer choices are correct. Thank you.
Mark the following statements as true or false. If a statement if false, correct it to make a true statement. a. An excitatory postsynaptic potential is caused by K+ or Clchannels opening in the membrane of the postsynaptic neuron. b. Postsynaptic potentials may summate by spatial summation in which multiple neurons fire onto a single postsynaptic neuron. c. An inhibitory postsynaptic potential causes the membrane potential of the postsynaptic neuron to approach threshold. d. Spatial summation can combine two EPSPs, two IPSPs, or an EPSP and an IPSP
You apply a drug to a batch of neurons and record membrane potential changes in the presynaptic and postsynaptic neurons. You record an action potential in the presynaptic neuron and a change from -70mV to -55mV in the postsynaptic neuron. Your drug most likely allowed which ion into the postsynaptic neuron? Sodium (Na+) Glutamate Potassium (K+) GABA Chloride (Cl-)