Which treatment would eliminate the early inward current in a squid giant axon? O Applying a calcium channel blocker Removal of external potassium Removal of external sodium O Applying a potassium channel blocker

At the membrane of an axón, the action potential is -60 mV for K+ ions. Calculate de external and internal concentration radios.

Shown attached are the recordings from one cell in the Swimmy CPG circuit. The first recording is under controlconditions, when the fish is swimming normally. The second recording is of the same neuron when every othercell in the CPG is hyperpolarized and not firing. The large black bars have been placed at the first spike in thecontrol condition. Which of the following can you conclude about this cell from the data shown below? Make sure to choose the most complete answer. a. This cell is tonically active.b. This cell is an endogenous burster cellc. This cell is an endogenous burster cell that is normally acted on by at least one inhibitory synapse.

What enables action potential to jump from one node of Ranvier to the next? A. Increased LC B. Increased membrane resistance OC. Decreased LC OD. A and B OE. B and C mmmmm

Extracellular recordings create a distinct action potential. Choose the option that best describes the trace recording after stimulation.    1.The voltage trace becomes increasingly positive because the extracellular space becomes less negative 2.The voltage trace becomes increasingly positive because the extracellular space becomes less positive 3.The voltage trace becomes increasingly negative because the extracellular space becomes less positive 4.The voltage trace becomes increasingly negative because the extracellular space becomes more positive

The plasma membrane of the giant squid axon becomes depolarized in response to action potential.     true     false

Conduction velocity refers to the [a] at which an action potential travels along a neuron's axon. In invertebrates, conduction velocity can only be increased by [b]. However in vertebrates (exclusively), such as humans, conduction velocity can also be increased by [c]. This enables vertebrates to conserve [d] while still increasing conduction velocity. [a] [b] [c] [d] [Choose ] [Choose ] [Choose ] [Choose ]

What drives K+ ions through voltage gated channels while funny channels are also open? O pifference in K+ concentration across the PM O pressure potential O Both difference in K+ concentration across the PM and Membrane potential (difference in charge across the membrane) O Osmotic potential O Membrane potential (difference in charge across the membrane)

Give typed full explanation

Name the following ion channels are sensitive to pressure waves in fluid of the inner ear? voltage-gated channels ligand-gated channels with extracellular ligands potassium channels at the Nodes of Ranvier ligand-gated channels with intracellular ligands stress-activated channels