5 Written questions
5 Matching questions
- What is a graded potential? Can it travel a long distance? Why or why not?
- What ions are pumped out the cell when the Na/K pump is activated?
- What is the most immediate effect of application of a threshold stimulus to a nerve fiber membrane?
- What is an EPSP and a IPSP? Are these graded potentials, action potentials, or can they be both?
- What is a monosynaptic reflex? Name the elements necessary in a polysynaptic reflex arc.
- a A change in the membrane potential that is localized to one area of the plasma membrane. Also known as local potentials.
Cannot travel long distances because they spread in a decremental fashion. They rapidly decrease in magnitude as they spread over the surface of the plasma membrane (teacher's voice in a large lecture hall)
- b EPSP - Excitatory Post Synaptic Potential; potential of the cell to reach threshold again after it has been through a cycle.
IPSP - Inhibitory Post Synaptic Potential; Hyperpolarize on purpose to prevent a response to every stimulus.
- c 3 Na out, 2 K in
- d Takes one neuron to affect the other neuron and dictate a response.
Receptor, sensory neuron, control center, motor neuron, effectors
- e ...
5 Multiple choice questions
- No because the neuron consists of many other things that make up the neuron (dendrites, axons, cell bodies, axon terminals)
- Schwann cells can point the neuron in the right direction so it can regrow to the proper receptor sites.
- 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
- Only allows certain things through.
5 True/False questions
What is neuroglia? How do these cells compare (in structure, number, and function) to the neurons. What are the functions of each of the neuroglia? Which ones are in the CNS and which ones are in the PNS? → 3 Na out, 2 K in
How are nerve impulses transmitted across synapses? Compare this to transmission of an impulse from nerve fiber to muscle fiber. Is transmission of the impulse across a synapse one-way? What role does calcium play in the release of a neurotransmitter? → Through Neurotransmitters
Calcium has to go into the synapse to stimulate the vessels to open.
What is an electrochemical gradient? → spatial variation of both electrical potential and chemical concentration across a membrane.
Name the 3 types of neurons (based on structure). → Unipolar
What gives peripheral nerves their white appearance? → Mylination