Choose two false statements and explain why? Toxin causes voltage-gated sodium channels to open at a lower voltage toxin slows down the inactivation of sodium channels toxin causes ligand-gated sodium channels to open toxin causes voltage-gated potassium channels to open faster
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A: opening of ligand gated sodium channels Na+/K+ Atpase.
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- Fill in the blank: The difference in electrical charge between the inside and the outside of a nerve cell membrane is called the_______________________ potential.please just true or false 1-Simple columnar absorption, secretion and move mucus by cilia. 2-Bacterium is cell. 3-All hormones are secreted inside the body, therefor its do not like the saliva. 4-Organisms differ from one to another but all are made up of one cell. 5-Action potentials normally travel from the axon terminal toward the cell bodyTetrodotoxin is a neurotoxin found in puffer fish. This large molecule blocks the sodium channels in neurons. Infer the effect tetrodotoxin would have on the passing of an action potential in a neuron.
- Your patient is receiving basiliximab and develops cytokine release syndrome. You would expect to see: (SELECT ALL THAT APPLIES) Chills Weakness Coughing TremorsDRAW IT Three of the events described in the figure are ion flow; change in membrane potential; andopening, closing, or inactivation of channels. Use these events to draw a simple circuit diagram for thepositive feedback that underlies the rising phase of the action potential.Cholera toxin has which of the following direct or indirect actions: a. opens Na+ channels; Choose all that apply; Group of answer choices closes Cl− channels increases cAMP levels activates αs subunit of GTP-binding protein increases GTPase activity
- In 50 words direct to the point. The cell membrane a traffic controller message receptor, and signal relay station. This is a common-sense question. How does the medicine we take for a particular ailment get to the cells or tissues affected by the disease?Figure 35.3 Which of the following statements is false? The soma is the cell body of a nerve cell. Myelin sheath provides an insulating layer to the dendrites. Axons carry the signal from the soma to the target. Dendrites carry the signal to the soma.Fill in the blank: The greater the diameter of a nerve fiber, the _______________________ the impulse travels.
- The plasma membrane of the giant squid axon becomes depolarized in response to action potential. true falseA student is eating at the lab bench (a clear violation of lab policies) and mistakenly sprinkles tetrodotoxin on his fries. Explain the origin of the toxin and its normal function in that animal. Given that this substance inhibits voltage-gated sodium channels, indicate whether each of the statements below are true or false. Explain your answers. Explain the time course of the response. It will be more difficult for the student’s neurons to generate action potentials The student’s neurons will fire more frequently because membrane potential will be brough closer to threshold. The effect on the membrane potential o the student’s neurons could be predicted by the Nernst equation, which factors in the effects of both ion concentration and ion permeability.**Please just answer the questions no need for explanation** 1) What effect would the toxin have on a cell with a non-excitable membrane in the man's body? Answer choice (Hyperpolarization, Afterhyperpolarization, No effect, Depolarization) b)True/false A cell membrane can have a membrane potential of 0mV c) True/false If the effect of EPSPs from many synapses outweighs the effect of many IPSPs from many synapses, threshold potential can be reached at the initial segment. d) true/false Under normal conditions, one EPSP, from a single synapse on a dendrite, can stimulate an action potential at the initial segment. e) True/false A cell affected by tetrodotoxin would have an action potential firing rate in the initial segment of the axon of about 100 action potentials per second
