L09_Key_1106S19.docx - BIOL 1106 Classwork Spring 2019 Lesson 9 Communication via Neurons(20 pts This graded assignment is subject to the Virginia Tech

L09_Key_1106S19.docx - BIOL 1106 Classwork Spring 2019...

This preview shows page 1 - 2 out of 4 pages.

BIOL 1106 Classwork Spring 2019 Lesson 9: Communication via Neurons (20 pts) This graded assignment is subject to the Virginia Tech Honor Code. Sharing or posting any content from this assignment, or using such shared or posted assignment content to answer assignment questions, is a violation of the Virginia Tech Honor Code. Names and email addresses of team members: 1. 2. 3. Learning Objectives 1.Explain the ionic basis of the resting membrane potential, action potential, and synaptic potentials and describe how gated ion channels produce these signals.2.Describe the role that myelination plays in nervous system function.3.Distinguish between electrical and chemical synapses.4.Describe how the information in an action potential is transmitted across a chemical synapse andintegrated in postsynaptic neuron.5.Describe the mode of action of stimulatory and inhibitory neurotransmitters.S1. Apply scientific reasoning to biological problems.S3. Interpret and draw conclusions from scientific data.Signal Transmission along the axon Learning Objective 1 & 21.(6.5pts, .5pt/blank) Use your notes to fill in the blanks below. Write the correct word or phrase inside the empty parentheses. For the options in parentheses, delete the incorrect option. Leave your answers in bold font. Slide 14 from the powerpoint should be useful.a)An unstimulated axon is at resting potential. At resting potential, the inside of the cell is slightly (negative)compared to the outside of the cell. Voltage-gated sodium channels are (closed).b)At the axon hillock, the graded potentials from the dendrites are summed and if they exceed thethreshold potential a(n) ( action potential)is created. c)An above-threshold voltage causes the activation gate of the ( voltage gated sodium)channel to open, and ( sodium)ions diffuse in, causing (depolarization).d)When peak membrane potential is reached, sodium inactivation gates
Image of page 1
Image of page 2

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture