Q: explain the role of Na+ and K+ channels in generating an action potential
A: Action potential & Membrane potential Almost all cell membranes maintain a voltage difference…
Q: Describe the 6 step sequence of events that occurs at the NMJ in response to a nerve Action…
A: Steps:- The sarcolemma initiates the action potential. 2)The axon terminal receives the action…
Q: 1. Graded potentials are short lived and travel only short distances. Action potentials are long…
A: Graded potential: its the change in electric potential across the membrane of an excitable cell like…
Q: 4. What would happen if Na+ channels opened and stayed open?
A: Sodium channels are integral membrane proteins that form ion channels conducting sodium ions through…
Q: 4.Describe an action potential. What is required before an action potential is activated?
A: The human nervous system is the system which is responsible for maintaining the coordination among…
Q: People who inherit familial periodic paralysis often develop very low blood potassium…
A: A cell membrane is frequently polarised or electrically charged. In comparison to the outside, the…
Q: 7. Assuming equivalent stimulation of the two pre-synaptic axons in the diagram below, in which of…
A: Neurons communicate by using chemical messengers like serotonin between cells. Serotonin transporter…
Q: Define an excitatory and inhibitory postsynaptic potential. Describe their significance and what…
A: The postsynaptic potential (PSP) is defined as a change in the electric potential of the nerve cell…
Q: 1. Describe the role of differential electrical charge across the cell membrane in both non-…
A: Definition: - Membrane potential or Transmembrane Potential is a the difference of electric…
Q: Define temporal and spatial summation and how they influence an action potential.
A: The process of summing, which involves both spatial and temporal summation, decides whether or not…
Q: Explain what will happen in an axon undergoing an action potential but which is unable to utilize…
A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…
Q: Explain the difference between a graded potential and an action potential.
A: Cells communicate with each other via released proteins unique to each kind. Signal transduction…
Q: Compare graded and action potentials are similar and different.
A: The nervous system establishes its function by the means of neurons or nerve cells that aid in the…
Q: .What are the 3 types of chemical channels and where on the neuron would they be found? b.What…
A: Nerve cells or neurons are the basic structural and functional unit of the nervous system. They are…
Q: Na+K+ pump in maintaining the membrane potential of a cell.
A: The membrane is the potential represents that the balanced equilibrium potentials of the ions to…
Q: Draw a picture of the steps involved in the creation and propagation of an action potential. Make…
A: Action potential Action potential or nerve impulse refers to the sequence of changes, in which…
Q: List and the 3 main regions a neuron and the functions of each.
A: Introduction: Neurons also referred to as nerve cells, are the basic fundamental units of the…
Q: How are action potentials created? What is the process with regard to membrane potential, sodium,…
A: The neurons have the capability of producing and transmitting electrical impulses throughout the…
Q: Define the structural and functional classifications of a neuron
A: Neurons are the major units of the brain and sensory system, the cells are liable for getting…
Q: 22. Blocking the opening of the voltage-gated potassium channels (after depolarization to threshold…
A: The movement of ions across the cell membrane generates action potential and the membrane either…
Q: 19. Identify the two major types of channels that open and close during an action potential in a…
A: Voltage gated ion channels are the transmembrane proteins, which plays important role in the…
Q: 8. The resting potential of a neuron that is submerged in a solution with zero extracellular…
A: A resting neuron has a voltage across its membrane called the resting membrane potential, or resting…
Q: Draw a standard action potential compared to an action potential whose voltage gated potassium…
A: Action potential consists of following phases- depolarization repolarization hyperpolarization and…
Q: 1. Certain neurological diseases, like multiple sclerosis, are hallmarked by progressive…
A: In multiple sclerosis disease, the central nervous system (the brain, the spinal cord and optic…
Q: 6. If the action potentials shown in the diagram below occur sequentially and in close temporal…
A: Threshold of Stimulation can be defined as the physiology of nerve and muscle cells, the minimum…
Q: 16. Neurons that process similar kinds of information are organized into what are called “neuron or…
A: The two types of processing by the nervous system.
Q: Compare graded and action potentials.
A: graded potential is the variable-strength stimulatory signal that can be transmitted over little…
2. Discuss the role of ion channels in the initiation of neuronal excitability.
Step by step
Solved in 2 steps with 1 images
- Which of the following does not contribute to propagation of action potentials? a. As the area outside the membrane becomes negative, itattracts ions from adjacent regions; as the inside of the membrane becomes positive, it attracts negative ions from nearby in the cytoplasm. These events depolarize nearby regions of the axon membrane. b. The refractory period allows the impulse to travel in only one direction. c. Each segment of the axon prevents the adjacent segments from firing. d. The magnitude of the action potential stays the same as it travels down the axon. e. Up to a limit, increasing the intensity of the stimulus increases the number of action potentials.10. explain the role of Na+ and K+ channels in generating an action potential.8. Define an excitatory and inhibitory postsynaptic potential. Describe their significance and what determines whether a neuron will fire.
- 1. Explain what will happen in an axon undergoing an action potential but which is unable to utilize monosaccharides for cellular respiration.6. How are action potentials created? What is the process with regard to membrane potential, sodium, and potassium? Why is there a refractory period and why is there an undershoot?4.Describe an action potential. What is required before an action potential is activated?
- 2. People who inherit familial periodic paralysis often develop very low blood potassium concentrations. How would you explain that the paralysis may disappear quickly when potassium ions are administered intravenously? HINT Think of membrane potential.10. Define temporal and spatial summation and how they influence an action potential.19. Identify the two major types of channels that open and close during an action potential in a neuron (see images below). the voltage-gated Na* channel and the voltage-gated K*channel 20. What stimulates the two channels above to open?
- 1. Describe the role of differential electrical charge across the cell membrane in both non- excitable and excitable cells. Include in your description terms like equilibrium potential, hyperpolarization, depolarization, and the sodium-potassium pump. For excitable, think in terms of both neuron and muscle.7. Assuming equivalent stimulation of the two pre-synaptic axons in the diagram below, in which of the two post-synaptic cells will you observe a stronger response? Why? = 5-HT = 5-HT receptor = 5-HTT (transporter)9. Compare graded and action potentials.