Domanda del libro di testo
What is the difference between temporal summation and spatial summation?
66
views
Ch. 12 Nervous Tissue
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy & PhysiologyISBN: 9780137854011
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy & PhysiologyISBN: 9780137854011Non è quello che usi tu?Cambia libro di testo
Capitolo 12, Problema 20
Describe the events that occur during nerve impulse transmission at a typical cholinergic synapse.
Guida verificata passo dopo passo1
Begin by explaining that a cholinergic synapse is a type of chemical synapse where the neurotransmitter acetylcholine (ACh) is released to transmit the nerve impulse from one neuron to another or to a muscle cell.
Describe the arrival of an action potential at the presynaptic terminal, which causes voltage-gated calcium channels to open, allowing Ca^{2+} ions to enter the presynaptic neuron.
Explain that the influx of Ca^{2+} triggers synaptic vesicles containing acetylcholine to move toward and fuse with the presynaptic membrane, releasing ACh into the synaptic cleft by exocytosis.
Detail how acetylcholine diffuses across the synaptic cleft and binds to nicotinic acetylcholine receptors on the postsynaptic membrane, causing ion channels to open and allowing Na^{+} ions to enter the postsynaptic cell, leading to depolarization.
Conclude by describing the termination of the signal: acetylcholine is rapidly broken down by the enzyme acetylcholinesterase in the synaptic cleft, which stops the stimulation of the postsynaptic cell and allows the synapse to reset for the next impulse.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Structure and Function of a Cholinergic Synapse
A cholinergic synapse is a junction where the neurotransmitter acetylcholine transmits signals between neurons or from neurons to muscles. It includes the presynaptic terminal, synaptic cleft, and postsynaptic membrane with acetylcholine receptors. Understanding this structure is essential to grasp how nerve impulses are transmitted chemically.
Video consigliato:
Percorso guidato
06:04
Functional Groups
Mechanism of Neurotransmitter Release and Binding
When an action potential reaches the presynaptic terminal, it triggers calcium ion influx, causing synaptic vesicles to release acetylcholine into the synaptic cleft. Acetylcholine then binds to receptors on the postsynaptic membrane, initiating a response such as muscle contraction or continuation of the nerve impulse.
Video consigliato:
2:30Neurotransmitter Receptors
Termination of the Nerve Impulse
To stop the signal, acetylcholine is rapidly broken down by the enzyme acetylcholinesterase in the synaptic cleft. This degradation prevents continuous stimulation of the postsynaptic cell, allowing the synapse to reset for the next nerve impulse.
Video consigliato:
Percorso guidato
02:443) Termination of Transcription
Pratica correlata
Domanda del libro di testo
In multiple sclerosis, there is intermittent and progressive damage to the myelin sheath of peripheral nerves. This results in poor motor control of the affected area. Why does destruction of the myelin sheath affect motor control?
898
views
Domanda del libro di testo
Describe the steps involved in the generation of an action potential.
726
views
Domanda del libro di testo
What are the structural and functional differences among type A, B, and C fibers?
709
views
Domanda del libro di testo
Harry has a kidney condition that causes changes in his body's electrolyte levels (concentration of ions in the extracellular fluid). As a result, he is exhibiting tachycardia, an abnormally fast heart rate. Which ion is involved, and how does a change in its concentration cause Harry's symptoms?
588
views
Domanda del libro di testo
State the all-or-none principle of action potentials.
599
views