Depolarisation & repolarisation in metaneuron - put the following events in order (from 1 to 4).                                                        Membrane potential crosses the threshold potential and an action potential is achieved.                                                        Depolarisation occurs when the applied current is sufficient to move membrane potential towards neutral.                                                        The neuron’s membrane potential drops below the initial resting membrane potential and temporarily becomes refractory to further action potentials.                                                        Membrane quickly repolarises by opening of K+ channels, allowing K+ions to leave the cell and charge separation to be re-established.

Membrane Potential (mV) The Action Potential 1. Label the significant membrane potentials and phases of the action potential in a neuron. Indicate which gates are open/closed as well as the direction of the net movement of sodium and potassium ions across the cell membrane for A-G. +30- 0 -55-B -70- -80- 0 H [T E 2 F 3 Time (ms) G 4 5

Activities Based on the anatomical characteristics of the neuron illustrated in Figure 10.1, what is the structural classification of this neuron? Structural classification Functional clasification or Identify the structural classification for the following images of neurons. Identify the functional classification of the neurons in the following figures. OR Label the neuron figure below with the following structures: dendrites, cell body, axon hillock, myelin, nodes of Ranvier, axon terminals. What is the structural and functional classification for this neuron? Functional: Structural: 330 Nervous System | Unit 10

8,9 and 10 if possible

Detailed understanding of what the action potential of a neuron. What is the opening and closing of multiple channels required?

A-DA- N == |-| Juárez de Ku BIOL 2402-Anatomy and Physiology I 0 1 2 3 Time (milliseconde) Normal 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 Kichannel Page 9 of 14 No Spacing