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Questions and Answers
Is the neurotransmitter, Acetylcholine, synthesized in the neuronal soma(cell body) or axon terminal? Is Ach synthesized in the neuron's soma or axon terminal. My physiology teacher states that it is synthesized in the soma and that our text is wrong. The text says that it is synthesized in the terminal by Choline Acetyl Transferase (CAT). Who's right?

SMA replied: "The synthesis of small-molecule neurotransmitters occurs within presynaptic terminals (axon terminal) from acetyl coenzyme A (acetyl CoA, which is synthesized from glucose) and choline, in a reaction catalyzed by choline acetyltransferase (CAT). The enzymes needed for transmitter synthesis are synthesized in the neuronal cell body and transported to the nerve terminal cytoplasm by a mechanism called slow axonal transport. Peptide-secreting neurons generally synthesize polypeptides in their cell bodies that are much larger than the final, “mature” peptide. The final stages of peptide neurotransmitter processing occur after packaging into vesicles and involve proteolytic cleavage, modification of the ends of the peptide, glycosylation, phosphorylation, and disulfide bond formation. I am afraid your instructor is wrong, the book is correct."

Where are the cell bodies (soma) and axonal projections found? Is it the synapse ? or maybe the CNS / PNS ? I'm not sure - please help !

spdesai7 replied: "I'd go with central nervous system."

Niotulove replied: "Based on the info you gave, a specific answer can't be given. What kind of neuron are you talking about? An upper motor neuron has its cell body and axon in the CNS. A lower motor neuron has its cell body in the CNS and its axon in the PNS. A sensory neuron has its cell body in the PNS (in the dorsal root ganglia) and its axon projects into the CNS. And then there are preganglionic and postganglionic neurons of the autonomic nervous system to consider. See what I mean? Your question is too general, sorry."

mr.answerman replied: "Yours is a broad question but I can answer to a degree. Here is a good example. The cortex of the brain is the gray matter. The cortex is the outer layer of the brain and it is about 1/8 inch thick. In this layer are the cell bodies of neurons and unmyelinated axons and dendrites. Now in the brain below the cortex is the white matter. In the white matter are myelinated axons."

The soma in neurones what is it read inside for more info please? I'm confused about the soma I know its the cell body in the axon but what confuses me is that there is also a soma in the supporting cell of the Oligondendrocyte. So is it just a general cell body with all the things to the cell alive. Any help greatly appreciated. Yes sorry at the end of the axon is what i should have said. The main confusion is why there is also a soma in the Oligondendrocyte.

Niotulove replied: "The neuron's cell body is the soma. The axon is a separate part. The word 'soma' comes from the Greek, and means body. It contains the organelles necessary for a cell to survive and perform it's function. For example, the soma of a neuron contains the cell's nucleus and Nissl bodies. That's it, no tricks."

Specifically, where are NMDA receptors expressed? Are they only present on dendritic spines? are they all along the axon? are they also present in the pre- and post- synapse, and cell body/soma?

Geoff replied: "I'm no expert on NMDA receptors, but as far as I know, the answer is, "It depends." In most cases, it's probably safe to think of NMDA receptors being expressed primarily on dendritic spines, and at post-synaptic sites in general (since not all synapses occur on spines). However, NMDA receptors can be found other places on the cell membrane, I believe typically in an inactive form. I'm not aware of NMDA receptors being found presynaptically on axon terminals, but it wouldn't really surprise me if it turns out that they are sometimes found there as part of some sort of glutamate autoreceptor system."

The neuron has three basic parts that can be likened to your arm. Your fingers represent the _____; the palm o The neuron has three basic parts that can be likened to your arm. Your fingers represent the _____; the palm of your hand represents the _____; and your forearm represents the _____. 1. somas; cell body; dendrite 2. receivers; generator; transmitter 3. dendrites; myelin, axon terminal 4. dendrites; cell body; axon

Dr. Rob Rice replied: "4. Dendrites; cell body; axon A neuron is set up (from proximal (front) to distal (back)): dendrites > soma > axon > teledendron Where the Teledendron of cell 1 and the dendrites of cell 2 meet is the synaptic gap. It is in the synaptic gap that exchange of chemicals happens"

I have a Psychology Question? Which of the following describes the correct sequence of electrical activity as it passes through a single nerve cell? a. axon, dendrite, soma, vesicle b. soma, cell body, dendrite, vesicle c. soma,vesicle, dendrite, axon d. dendrite, soma, axon, vesicle

Pam R replied: "D"

Jess replied: "ahaha! are you in mrs.lenoards abnormal pyschology class in BCC? this is great."

human anatomy questions.... help on any question appreciated? The Nervous System: Anatomy Review 1.Neurons communicate with other neurons and stimulate both ___________ and ______________. 2.Match the following parts of the neuron and their function: Dendrites - conductive region; generates an action potential Soma (cell body)- input area; receives signals from other neurons Axon - input area; main nutritional and metabolic area 3.Signals from other neurons are received at junctions called ________________, located primarily on the ________________ and __________________, the receptive and integrative region of the neuron. 4.The area where the axon emerges from the soma is called the ____________ ___________. This is also the area where the outgoing signal, called a/an _____________ _____________ is generated. 5.An axon can branch, forming axon ______________. At the end, axons branch to form many axon _________________. 6.What support cell forms the myelin sheath? __________________ Myelin is found around which part of the neuron? ______________ The tightly wound cell membrane around the axon forms the myelin sheath and acts as ________________. 7.The gaps between the Schwann cells, called the __________________________, are essential for the conduction of the action potential. 8.The most common central nervous system neuron, which was examined in this exercise, is called a/an _______________________ neuron. In the quiz section, you labeled a/an _____________________ neuron, which is found in the peripheral nervous system. 9.Neurons have (only one or many) axon/axons. Axons are (never or frequently) branched. Dendrites have (only one or many) branch/branches.

Pharaoh replied: "THE NERVOUS SYSTEM. "

psychology...............? allowed: 25 minutes Number of questions: 5 Finish Help Question 1 (6 points) Match the following terms with their description: Preview columns: Extensions of a neuron that receive neurotransmitters Extensions of a neuron that send neurotransmitters Part of the neuron where incoming information converges (comes together) Part of the neuron where an electrical signal is conducted Part of the neuron that increases speed of the electrical signal Gap between neurons, across which a chemical is sent Myelin sheath Axon Synapse Soma (Cell Body) Dendrites Terminal buttons/fibers Matching pairs: 1— 2— 3— 4— 5— 6— Save answer Question 2 (1 point) "Runner's high" (the good feeling that comes after running for a period of time) is most likely the result of a.acetylcholine b.endorphins c.dopamine d.estrogen Save answer Question 3 (1 point) When we have been excited by something, we eventually calm back down because of the a.central nervous system b.sympathetic nervous system c.parasympathetic nervous system d.somatic nervous system Save answer Question 4 (1 point) Reuptake refers to the: a. movement of neurotransmitter molecules across a synaptic gap. b. binding of neurotransmitter molecules to dendritic receptor sites. c. inflow of partially charged ions through an axon membrane. d. reabsorption of excess neurotransmitter molecules by a sending neuron. Save answer Question 5 (1 point) The motor cortex is located in the ________ lobes. a. occipital b. temporal c. frontal d. parietal

Starfire replied: "Geez..you need to do your homework on your own, that's the only way your gonna learn the material"

i need help on these questions relating to the structure and functions of the neurons? i need help. my book doesn't have this information. i really appreciate it. 1. 2 kinds of fibers extend from the somas of many neurons: one long ___ and many short bushy ___. 2. the __ of a neuron is the large spherical structure that contains its genetic material. 3. __ potentials are conducted nondecrementally. 4. the process of neurotransmitter release is called __. 5. neurotransmitter molecules are often stored in synaptic __ near the presynaptic membrane. 6. together the dendrites and cell body are referred to as the __ area of a neuron. 7. action potentials are generated as the axon __. 8. each synapse is sandwiched between __ membrane and a __ membrane. 9. neurotransmitter molecules, once released, diffuse across the __. 10. prominent in the cytoplasm of the cell body is a system of plate-shaped membranous sacs, much of which has a rough appearance. this structure is called ___ ___. 11. neurotransmitter molecules bind in a key-in-lock fashion to postsynaptic ___.

citrus punch replied: "1. axon, dendrites 2. nucleus 3. action 4. neurotransmission? secretion? not sure what they want 5. vessicles 6. ?? 7. depolarizes 8. presynaptic, postsynaptic 9. synapse (or synaptic cleft) 10. endoplasmic reticulum 11. receptors"

Neurons "talk" to each other chemically when ____ are released.? a. neurilemmas b. somas c. neurotransmitters d. telodendrias NeIf Wilhelm Wundt asked you to report your sensations ahd perceptions by looking inward, you would be engagin in: a. introspection b. observation c. functionalism d. psychoanalysis As gas prices increase we see a decline in the amount of travelers on the highway. This is an example of ___ correlation. a. positive b. zero c. negative d. perfect Hair is to braid as a. cell body is to dendrites b. axon is to nerve c. axon is to myelin sheath d. neuron is to synapse

Puppy replied: "This is not homework help."

The VIP replied: "1) c.Neurotransmitters 2) b.Observation 3) b. Zero 4) b. axon is to nerve"

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