Bio 252 Exam 1 Practice Questions and Solutions Peripheral
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Course
BIO 252
Institution
BIO 252
Peripheral Nervous System has 2 divisions Sensory Division and Motor Division
Sensory Division Somatic Sensory Visceral Sensory
Motor Division Somatic Motor Visceral Motor
Rectus Abdominis functional group Somatic Motor
Pain Receptor in skin functional group Somatic Sensory
Stretch Receptor in...
Pain Receptor in skin functional group ✅Somatic Sensory
Stretch Receptor in the bladder functional group ✅Visceral Sensory
Mucus Secreting gland in stomach functional group ✅Visceral Motor
Visceral Motor Division's two divisions ✅Sympathetic division
Parasympathetic division
(digestion, heart rate)
Neurons are: ✅1) excitable: responsive to external stimuli
2) conductive: electrical signals are propagated
3) secrete: neurotransmitters are released
Neuron's major job of the body ✅To relay signals or decision makers
3 functional groups of neurons ✅1)Sensory neurons (PNS)
2) Interneurons (CNS)
3) Motor neurons (PNS)
*Sensory and Motor neurons can be in CNS
Nissl bodies ✅A patch of rough ER: ribosomes and protein synthesis
Lack centrioles: needed for cell division.
Neurons are sometimes referred to as post-mitotic or amitotic
The axon branches are called:
, The movement of signals in axons are: ✅axon collateral
Schwann cells ✅a type of glial cells: the other type of cell that makes up nervous
tissue
Wraps around the axon and the layers represents the cell's membrane
The axon has many many layers of phospholipids wrapped around it (schwann cells)
making it: ✅Lipid dense
Hydrophobic
Electrically insulated
Microtubule ✅Units of proteins that lead to nucleus
Motor Proteins ✅Dyneins
Kinesins
Use ATP to move back and forth among microtubules
- grab other things in the cell
(proteins, mitochondria, neurotransmitters and place them in other parts of the cell)
Anterograde transport
Uses____?
Which way does it move? ✅kinesis
Move away from soma
Retrograde transport:
Uses___?
Which way does it move? ✅dynesis
Move towards soma
Spinal nerves contain cell bodies of the sensory neurons. What happens when
activated? ✅Anterograde transport.
Neurons travel in bundles (nerves) that are segmented in their emergence from the
CNS.
Kinesins to affect skin cells.
Terminal arborization ✅Helps to affect and send signals to many cells and sites
Synaptic Knob ✅Have vesicles: little bits of cell membranes that are internal to the
cell- not part of the membrane but made up of phospholipid bylair
-neurotransmitters are there
-electrical signals allow for release of neurotransmitters
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