{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Functional Neuro: Test One

Functional Neuro: Test One - Term Definition What direction...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Term: What direction is anterograde transport? Definition: Soma to axon; delivers proteins Term: What direction is retrograde transport? Definition: Axon to soma; removes wastes Term: What important cellular components do axons lack? Definition: mRNA and ribosomes = cannot make own proteins, rely on anterograde transport Term: Microtubules Definition: largest cytoskeletal protein (20nm); made of tubulin; organelle transport Term: Neurofilaments Definition: "skeleton of the neuron" - gives stability and rigidity
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Term: Microfilaments Definition: smallest (5nm); made of actin; gives neuron fluidity - important role in development, neurotransmission, plasticity Term: How many Na and K ions does the sodium potassium pump transport and in which directions? Definition: 3 Na out for every 2 K in Term: What is the resting membrane potential and why is it negative? Definition: -70mV; negative due to a higher concentration of sodium outside the cell than potassium inside the cell, make the cell negative relative to the outside Term: What is the Law of Dynamic Polarization? Definition: neuron receives information at the dendrite and transmits information at the axon; many exceptions to this, example: in pseudo-unipolar neurons, morphological axons act as both dendrite and axon
Image of page 2
Term: What are the major differences between dendrites and axons? Definition: Dendrites are thick extensions of the soma that taper away from it, while axons are not extensions of the soma - they extend abruptly from the axon hillock , are thinner, and maintain a constant cylinder-shape throughout Term: Pseudo-unipolar neuron Definition: morphological axons function as both dendrite and axon; type of sensory neuron Term: Bipolar neuron Definition: has one dendrite and one axon; type of sensory neuron Term: Multipolar neuron Definition: has multiple dendrites and one axon; included motor neurons and interneurons
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Term: Intercleft filaments Definition: thin filaments that span the synaptic cleft, creating a rigid parallel arrangement of membranes Term: Collateral Definition: large axon branches Term: How do excitatory neurotransmitters affect the polarization of the neuron? Definition: Excitatory neurotransmitters depolarize the cell, making it more positive and creating an EPSP Term: How do inhibitory neurotransmitters affect the polarization of the neuron? Definition: Excitatory neurotransmitters hyperpolarize the cell, making it more negative and creating an IPSP
Image of page 4
Term: Passive Decay Definition: the loss of ions across the membrane as an electrical impulse travels down a dendrite, resulting in a weakening of the signal; thus, the closer a synapse is to the soma, the less distance the signal must travel and less likelihood of passive decay, resulting in a stronger signal Term: How can distal signals be boosted?
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern