BIOL 252 Exam 1 Study Guide with Complete Solutions
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Course
2024/2025
Institution
2024/2025
BIOL 252 Exam 1 Study Guide with
Complete Solutions
Central Nervous System - Ans:-"general" of the body; integration of sensory input and origin of
motor responses
• brain
• spinal cord
Peripheral Nervous System - Ans:-body; sensory input and motor output
• nerves
• sensory receptor...
axon - Ans:✔✔-long singular stalk extending from the soma of the neuron which creates action
potentials and sends inputs to other neurons
*A*xon → *A*way
myelin - Ans:✔✔-insulation present on some axons of the nervous system (not present on all axons);
whitish fatty segmented sheath around mot long (NOT ALL) axons that increase the speed of nerve
impulse transmission
- cell has concentric layers of membrane that make up the myelin sheath
- ONLY on axons (NOT dendrites, soma, etc.) but not all axons
- made from Oligodendrocytes (CNS) and Schwann cells (PNS)
- rather than one long piece of insulation, is multiple small pieces of insulation
-- nodes of ranvier
nodes of ranvier - Ans:✔✔-areas of the axon that is not covered in myelin, occurs between cells of
myelin
terminal arbor - Ans:✔✔-fine branching at the end of the axon
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