AND ANSWERS
What is Threat Stress? -
correct answer ✅Anything that stimulates the sympathetic
nervous system (fight-or-flight).
Examples of threat stress? -
correct answer ✅Bullets flying, written test, practical test,
intimidating instructor.
The nervous system is divided into two main structural divisions: -
correct answer ✅The Central Nervous System (CNS) and the
Peripheral Nervous System (PNS)
Central Nervous System (CNS) -
correct answer ✅Controls the brain and spinal cord.
The Peripheral is divided into two sub-systems: -
correct answer ✅The Somatic Nervous System and the Autonomic
Nervous System.
The Somatic Nervous System -
correct answer ✅Controls sensory nerves and the efferent, motor
nerves (intentional movement and sensation).
,68W ALC PHASE 3 EXAM QUESTIONS
AND ANSWERS
The Autonomic Nervous System -
correct answer ✅Controls automatic (involuntary) body functions
(unconscious body functions).
1. The physiological effects seen from threat stress are under the
influence of the Autonomic Nervous System, which is a sub-system
of the Peripheral Nervous System.
2. The Autonomic Nervous System is further broken down into two
sub-systems:
a. Sympathetic Nervous System (Fight-or-Fight)
b. Parasympathetic Nervous System ("Feed and Breed")
Two sub-systems of the Autonomic Nervous System? -
correct answer ✅1. Sympathetic Nervous System (Fight-or-Flight)
2. Parasympathetic Nervous System ("Feed and Breed")
,68W ALC PHASE 3 EXAM QUESTIONS
AND ANSWERS
Sympathetic Nervous System (Fight-or-Flight) -
correct answer ✅This system is mediated by catecholamine's
including epinephrine (adrenalin), norepinephrine and dopamine.
Effects of Sympathetic Nervous System (Fight or flight) -
correct answer ✅1. Pupil dilation. Enables better light gathering
for better vision, but causes loss of depth perception and loss of
peripheral vision. This may cause problems for 68Ws with
Intravenous catheterization and surgical cricothyroidotomy.
2. Tremors. This may make handling of tools and performance of
procedures such as intravenous catheterization, surgical
cricothyroidotomy and writing more difficult.
3. Tachycardia. May cause more oxygen consumption.
4. Vasoconstriction. May result in decreased large muscle
endurance due to decreased oxygen supply.
5. Bronchodilation. May result in enhanced respiration.
, 68W ALC PHASE 3 EXAM QUESTIONS
AND ANSWERS
6. Blood shunting from the fore-brain (the human, thinking part of
our brain) to the midbrain (the basic, mammal, animal-instinct part
of our brain). Result in decreased cognitive (thinking) ability.
7. Enhanced neural stimulation of large muscle groups. Resulting in
more strength.
Effects of Parasympathetic Nervous System ("Feed and Breed")
include: -
correct answer ✅1. Asserts an opposite effect to the SNS
(Sympathetic Nervous System).
2. Mediated by acetylcholine, mainly in the 10th Cranial Nerve
(Vagus Nerve).
3. Stimulates digestion, slowing of the heart rate and reproductive
functions.
4. Since pulse increases as SNS stimulation increases, pulse can be
used as an approximate indicator of stimulation.