Understanding the Nervous System: Neurons, Impulses, and Brain

Intro to Neuroscience Question Explain your reasoning and why you chose that answer.: Which of the following does NOT accurately describe medium spiny neurons (MSNs)? Group of answer choices They make a small number of synapses with many GPNs and a large number of synapses with a few GPNs They are GABAergic and therefore inhibitory. They are constitutively active to tonically inhibit the thalamus. They are activated by inputs from the cortex. All of the above are true

Intro to Neuro Question: The striatum has an (excitatory/inhibitory) connection to the globus pallidus external.  Activation of that connection (increases/decreases) activity in the globus pallidus internal, ultimately (promoting/suppressing) movement.Group of answer choicesExcitatory, increases, promotingExcitatory, increases, suppressingInhibitory, decreases, promotingInhibitory, decreases, suppressingInhibitory, increases, suppressing   Is my reasoning correct? The striatum has an inhibitory connection to the globus pallidus external (GPe). Activation of that connection decreases activity in the globus pallidus internal (GPi), ultimately promoting movement. Thus, the correct group of answer choices is: Inhibitory, decreases, promoting

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Intro to Neuroscience   Question: Which of the following statements ACCURATELY describe spinal cord organization. α-motor neurons are organized from lateral to media such that those found towards the medial section of the spinal cord controls the distal muscles. Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment. Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally Group of answer choices 1, 2, 4 2, 3, 4 2, 4 4 only 1,2,3,4

What is the difference between an action potential and a synapse? (select all that apply) The action potential moves down the axon and a synapse is between neurons. The synapse travels long distances and the action potential can only travel short distances. The action potential starts at the dendrites and the synapse starts at the ахon. The action potential is always the same and the synaptic potentials vary. the action potential involves only the postsynaptic neuron, but the synapse involves both the pre- and post-synaptic neurons.

Name: The Neuron 1. Processes that carry the action potential (impulse) away from the cell body are called 2. The short, numerous, receptive processes of a neuron are called 3. Gaps in the myelin sheath are called the 4. The CNS consists of the and 5. The PNS consists of the nerves and nerves. 6. Neurons that carry an impulse from a sensory receptor to the CNS are called neurons. 7. Neurons that carry an impulse from the CNS to a muscle or gland are called neurons. 8. Regions of the brain and spinal cord that contain myelinated fibers are referred to as matter. Areas with unmyelinated cell bodies are referred to as matter. 9. Label each of the indicated structures on the neuron below: This neuron is representative of the type of known as a neuron. (b) Copyright © 2005 Pearson Education, Ine., publishing as Benjamin Cummings.

Synapses Complete the notes below, filling in the blanks with the following terms decrease nanometres released receptor diffuses synapses presynaptic impulses chemical touch neurotransmitters postsynaptic binds stimulates reabsorbed Neurons do not 1 each other - there is a tiny gap between one neuron and the next in a neural pathway. These gaps are called. 2 Nerve next using 3 5 cannot cross these synapses: information is passed from one neuron to the messengers called When an impulse arrives at the end of the. into the synapse. This chemical messenger 20 Hi 9 6 neuron, the chemical messenger is 8 across the synapse: because the synapse is only about wide this takes a very short time. 11 On the other side of the synapse, the neurotransmitter binds with a the membrane of the neuron. As the neurotransmitter 10 molecule on 12 to the receptor it 13 a new nerve impulse in the postsynaptic neurone. • Finally, the chemical messenger is 14 back into the presynaptic neuron, ready to be used…

Inhibitory post synaptic membrane potential - Data Cl- Cl- Nr of GABA inside Max Postsynaptic Voltage (mV) outside receptors 140 20 hel-89- 00 140 20 - 34.428 140 40 - ףQLL-b Questions 11. What is an IPSP? 12. GABA receptors on the postsynaptic neuron function as ion channels for which ion? 13. Based on the data collected, when is it more possible for an action potential to occur? When the intracellular Cl- concentration in the postsynaptic neuron increases or when the number of GABA receptors on the postsynaptic membrane increases? 14. Explain

Put the events for action potential generation in a neuron in the correct order (From 1-9)

Interneuron after-discharge circuits prolong the duration of :-a- sensory input to the spinal motor centersb- synaptic delay in central synapsesc- discharge of efferent neuronsd- conscious perception of the evoked sensation

4 Which of the following would be an example of spatial summation that produces a depolarizing effect at the postsynaptic neuron? Resting membrane potential is -70 mV and threshold is -55 mV. Group of answer choices IPSP of 10 from neuron A followed in close succession by a 2nd IPSP of 5 from neuron A Simultaneous application of an IPSP of 5 from neuron A and an IPSP of 10 from neuron B Simultaneous application of an EPSP of 5 from neuron A and an EPSP of 10 from neuron B EPSP of 10 from neuron A followed in close succession by a 2nd EPSP of 5 from neuron A

Please note these are all one question group and should be answered as such!   Which of the following statements accurately defines epineurium?   A. Fluid-filled space at a synapse through which neurotransmitters diffuse   B. A vesicle containing neurotransmitters in the axon terminal of a neuron   C. The CT sheath that binds together the groups of fascicles, blood vessels, and lymphatic vessels in a peripheral nerve   D. The branch of the ANS that adapts the body for rest and digestion Which of the following statements accurately defines sacral plexus?   A. The ventral rami of C1–C4 (and a small contribution from C5) that serve the head and neck   B. The ventral rami of L1–L4 that serve the pelvis and lower limb   C. The ventral rami of C5–T1 that serve the upper limb   D. The ventral rami of L4–S4 that serve the pelvis and lower limb

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Required information ◄30s REFLEX ARC Skin Sensory receptor Stimulation of a sensory receptor results in the transmission of an afferent impulse along the axon of a sensory neuron. These axons end in the spinal cord. most cases, the impulse will then travel through an interneuron within the spinal cord to synapse with a motor neuron. 0:00 1:09 Sensory stimuli enter the spinal cord via Multiple Choice Sensory receptors Efferent axons Afferent axons Interneurons 1x 23

Identify TRUE or FALSE 5. The neuron cannot be stimulated during the absolute refractory period.6. The speed of a nerve impulse is independent of the presence of myelin.7. The tightly packed coil of neurolemmocyte membrane that encircles certain kinds of axons is called a node.8. Depolarization of the membrane of a nerve cell occurs by the rapid influx of organic ions.9. In a resting neuron the outside is negatively charged.10. The interior surface of a membrane of a nonconducting neuron differs from the exterior surface in that the former is negatively charged and contains more sodium.

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Please help with this question. It is not the third option with the three peaks.

Intro to Neuroscience   Q: Which of the following statements ACCURATELY describe spinal cord organization. α-motor neurons are organized from lateral to media such that those found towards the medial section of the spinal cord controls the distal muscles. Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment. Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally Group of answer choices 1, 2, 4 2, 3, 4 2, 4 4 only 1,2,3,4     Question: Both upper and lower motor neurons are involved in controlling the activity of your right bicep. Where do the cell bodies of these motor neurons live? Group of answer choices Upper motor neuron – left motor cortex; lower motor neuron – left spinal cord Upper motor neuron – left motor cortex; lower motor neuron – right spinal…

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HI THere first of all thank you so much for your time :)   the functions of the supporting neurological cell types and their impacts on the  -Neural net -fascial net -circulatory net I have been asked to write an article of 1000 words of this topic and i fully grasp the types of cells and the functions of each of them and their connection to the neurons. however i am truly struggling to find information on their impact on these three networks within the body or a description of that in order to elaborate.   Please help    kind regards  Raymond Burger

Intro to Neuro Question: The location of the synapses of descending cortical input to the cerebellum (the relay station) is the: Group of answer choices cerebral cortex. cerebellar cortex. medulla. pons. superior colliculus   Is this correct? The location of the synapses of descending cortical input to the cerebellum, serving as a relay station, is the: pons. Cortical input to the cerebellum is relayed through the pons in the form of pontocerebellar fibers, which synapse in the pontine nuclei. From there, fibers cross over (decussate) and enter the cerebellum.