5 Written Questions
5 Matching Questions
- What parts of neurons are found in gray matter? White matter? Why is it white?
- If a neuron synapses on a second neuron and drives the resting membrane potential further from threshold, what is this called? Where does it occur?
- What is a presynaptic neuron? Postsynaptic neuron? Define converge, divergence of neurons.
- Where are interneurons or association neurons located?
- Name the 3 types of neurons (based on structure).
- a In the spinal cord
- b Unipolar
- c Presynaptic - The neuron that sends the action potential to the next dendrite
Postsynaptic - Receives the message
Convergence of Neurons - First one neuron is influenced by many others, resulting in a convergence of input.
Divergence of Neurons - When the neuron fires, the signal is sent to many other neurons, resulting in a divergence of output.
- d IPSP, Inhibitory Post Synaptic Potential.
- e Cell bodies found in gray matter
Because the tissue is composed of fatty tissue.
5 Multiple Choice Questions
- Central Nervous System (CNS) and Peripheral Nervous System (PNS)
Autonomic (involuntary). Within this, there are Sympathetic (Fight or Flight) and Parasympathetic (Rest and digest).
- Depolarization - Potential difference becomes smaller or less polar. If extracellular concentration of K+ increases, there is less gradient between inside and outside.
Hyperpolarization - Potential difference becomes greater or more polar. If extracellular concentration of K+ decreases, steeper gradient between inside and outside
- Axonal transport is a cellular process responsible for movement of mitochondria, lipids, synaptic vesicles, proteins, and other cell parts (i.e. organelles) to and from a neuron's cell body, through the cytoplasm of its axon
- Dendrites coming into cell body
cell body contains the nucleus goes into the axon starting with the axon hillock
the axon travels down to axon terminals
5 True/False Questions
Which channels are activated for depolarization in an action potential? → Voltage Gated Na+ Channels
What is salutatory conduction of an action potential? Does it occur in all nerve fibers? How does diameter of a nerve fiber affect speed of conduction? → Salutatory conduction of an action potential is when you jump from node to node.
What ions are pumped out the cell when the Na/K pump is activated? → 3 Na out, 2 K in
How are electrical potentials of cell membranes measured? → mV
How does nerve tissue respond to injury? What cells are responsible for the repair? Where can it occur? → PNS
Everywhere except the brain