Kin 3515 Final Exam 1 With
Guaranteed Pass Solutions 2025\2026
Updated.
Explain the functions of the nervous system - Answer -Memory and Learning
-Maintains Homeostasis
-Monitors internal and external environment through sensory receptors
-Integrates the information received
-Initiates and coordinates a response
Three properties of neurons - Answer 1. Excitability
2. Conductivity
3. Myelination
Explain how excitable tissues maintain a negative resting membrane potential. - Answer -
Increased concentration of cations outside the cell relative to the inside of the cell, cell
membrane is more permeable to K+ than to Na+
Describe the process of an Action Potential - Answer -A graded potential triggers an AP which
opens voltage-gates Na+ channels
-The Na+ spreads and then opens Na+ channels and initiates the AP in the adjacent region along
the axon
-K+ channels are opened in the initial segment and the Na+ ions cannot trigger an AP in that
region since it's absolutely refractory
Factors that influence the excitability of tissues - Answer -Myelination
-Fiber Diameter
-Physiological Conditions
Describe how nervous impulses are initiated and propagated - Answer Nervous impulses are
initiated by either:
-the binding of a NT to Na+ channel proteins or
-environmental stimulus at a sensory receptor
Guaranteed Pass Solutions 2025\2026
Updated.
Explain the functions of the nervous system - Answer -Memory and Learning
-Maintains Homeostasis
-Monitors internal and external environment through sensory receptors
-Integrates the information received
-Initiates and coordinates a response
Three properties of neurons - Answer 1. Excitability
2. Conductivity
3. Myelination
Explain how excitable tissues maintain a negative resting membrane potential. - Answer -
Increased concentration of cations outside the cell relative to the inside of the cell, cell
membrane is more permeable to K+ than to Na+
Describe the process of an Action Potential - Answer -A graded potential triggers an AP which
opens voltage-gates Na+ channels
-The Na+ spreads and then opens Na+ channels and initiates the AP in the adjacent region along
the axon
-K+ channels are opened in the initial segment and the Na+ ions cannot trigger an AP in that
region since it's absolutely refractory
Factors that influence the excitability of tissues - Answer -Myelination
-Fiber Diameter
-Physiological Conditions
Describe how nervous impulses are initiated and propagated - Answer Nervous impulses are
initiated by either:
-the binding of a NT to Na+ channel proteins or
-environmental stimulus at a sensory receptor
