University of California
San Diego (UCSD)
COGS 107A Neuroanatomy and Physiology
COGS 107A Midterm and Final Exam
Course Title and Number: COGS 107A Neuroanatomy and
Physiology Exam
Exam Title: COGS 107A Midterm and Final Exam Exam
Exam Date: Exam 2024- 2025
Instructor: [Insert Instructor’s Name]
Student Name: [Insert Student’s Name]
Student ID: [Insert Student ID]
Examination
180 minutes
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COGS 107A Neuroanatomy and
Physiology 2024-2025
COGS 107A Midterm 2 Exam Submission Review
Questions with Correct Answers | 100% Pass
Guaranteed | Graded A+ |
Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
Tau - Answer>> the time it takes for voltage to rise to
67% or fall to 33% of its final value.
Length Constant - Answer>> L is the distance over
which a voltage step decays to 1/e (33%) of its original
value.
L tracks the square root of rm/ri ratio
If rm is large compared to ri, current will flow down the
inside of the axon and L will be large.
- how far passive current flows before it leaks out
Synaptic Transmission - Answer>> - Information
transfer at synapse
- Plays role in all the operations of the Nervous System.
- 2 types: Chemical and Electrical
- Concept: 1897 Charles Sherrington "Synapse"
3 peoples findings of Synaptic Transmission -
Answer>> - 1921 Otto Loewi "Vagusstoff"
- 1951 Bernard Katz and John Eccles
- 1959 Furshpan and Potter
Electrical Synapse - Answer>> - Direct and passive
current flow
- linked together by Gap Junction
- Ionic current flows through the connexon channels
- direct connections between two neurons
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- found between sensory and
motor neurons in neural
pathways mediating escape reflexes.
Gap Junctions - Answer>> - bridges the cytoplasm of
two cells
- Connexon Channel
- 2 connexons forms 1 Gap Junction channel
- Many Gap Junction Channels form 1 Gap Junction
- Ions and small molecules can pass in both directions
- each connexon formed by 6 connexins
- Bidirectional
Electrically Coupled - Answer>> - Ions flow directly
from one cytoplasm to the next.
- cells connected by gap junctions
- Transmission at electrical synapses is very fast and, if
the synapse is large, nearly fail-safe.
Synaptic Integration - Answer>> - Several PSP's
occurring simultaneously to excite a neuron.
Synchronization - Answer>> - Brainstem neurons that
regulate breathing are electrically coupled.
Hormone Release - Answer>> - In the Hypothalamus
hormone-secreting neurons fire Action Potentials at
about the same time, facilitating a burst of hormone
into circulation.
Intracellular Signaling - Answer>> - Gap junction
pores allow ATP and secondary messengers to diffuse.
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