BI 121 lecture exam #4 (GRCC - Forbes) questions
with verified answers
( nerve impulse / electrical signal ) Ans✓✓✓ Changes in TMP
transmitted propagated along axon
1. Olfactory Ans✓✓✓ smell
10. Vagus Ans✓✓✓ speech and swallowing
11. Accessory Ans✓✓✓ transmit to neck muscles , palate , and larynx
12. Hypoglossal - Ans✓✓✓ move tongue
- all but olfactory orginate from brain stem
- mostly mixed nerves
2. Middle ear Ans✓✓✓ A. Tympanic cavity
A1 . Tympanic membrane F : Collect , concentrate and transmit sound
to inner ear
A2 . Auditory ossicles F : amplify and conduct sound to inner ear via
- Malleus
- Incus
- Stapes F : push against oval window to move inner ear fluid to
stimulate hearing receptors
,B. Auditory tube - allow air pressurse equalization on each side of
tympanum
2. Optic Ans✓✓✓ Vision
3. Oculomotor Ans✓✓✓ move eye , eyelids and iris
4. Trochlear Ans✓✓✓ Superior oblique muscle of eye
5. Trigeminal Ans✓✓✓ Sensory for forehead Face and eyes
6. Abducens Ans✓✓✓ - Lateral rectus muscle of eye
7. Facial Ans✓✓✓ Facial expressions and taste buds
8. Vestibulocochlear Ans✓✓✓ Equilibrium and hearing
9. Glossopharyngeal Ans✓✓✓ pharynx , tonsils , salivary , posterior
tongue
Action of NT controlled by Ans✓✓✓ Enzymes ,Recycle,
Neuromodulators
,Action potentials propagate along the axon via Ans✓✓✓ a .
Continuous propagation- occurs in unmyelinated axons . A series of
local current membrane depolarizations propagate the action potential
down the axon membrane
b. Saltatory propagation- occurs in myelinated axons. Ions can not flow
through myelin so ions cross at nodes
Alzheimer's Ans✓✓✓ decrease in acetylcholine causes memory loss ,
dementia and death
anaxonic neuron Ans✓✓✓ Dendrites & axons indistinguishable.
Limited to brain & sense organs
Arachnoid mater- Ans✓✓✓ Avascular membrane that reabsorbs
cerebrospinal fluid
Association ( interpretive ) areas Ans✓✓✓ not directly involved with
sensory or motor functions . Found in all lobes
Association ( interpretive ) areas Function Ans✓✓✓ A. Interpret
sensory information B. Memory
C. Emotions
D. Problem solving
E. Speech Conceptualization of consequence ( not mature in males until
25 )
, Autonomic ( involuntary ) functions of the Cerebellum Ans✓✓✓ 1.
Balance
2. Coordination of skeletal muscles
3. Posture
4. Integration possibly learning and memory )
Autonomic divides into Ans✓✓✓ 1. Sympathetic division - Moves body
away from homeostatic set point
2. Parasympathetic division - Moves body back toward homeostatic set
point.
Basal nuclei in M.O regulate Ans✓✓✓ A. Heart rate
B. Blood pressure
C. Respiration
bipolar neurons Ans✓✓✓ two processes (axon and dendrite) one at
each ends. E.g., eyes, nose, and ears
Brain divions Ans✓✓✓ a . Cerebrum
b . Cerebellum
c . Diencephalon
d . Brain stem
with verified answers
( nerve impulse / electrical signal ) Ans✓✓✓ Changes in TMP
transmitted propagated along axon
1. Olfactory Ans✓✓✓ smell
10. Vagus Ans✓✓✓ speech and swallowing
11. Accessory Ans✓✓✓ transmit to neck muscles , palate , and larynx
12. Hypoglossal - Ans✓✓✓ move tongue
- all but olfactory orginate from brain stem
- mostly mixed nerves
2. Middle ear Ans✓✓✓ A. Tympanic cavity
A1 . Tympanic membrane F : Collect , concentrate and transmit sound
to inner ear
A2 . Auditory ossicles F : amplify and conduct sound to inner ear via
- Malleus
- Incus
- Stapes F : push against oval window to move inner ear fluid to
stimulate hearing receptors
,B. Auditory tube - allow air pressurse equalization on each side of
tympanum
2. Optic Ans✓✓✓ Vision
3. Oculomotor Ans✓✓✓ move eye , eyelids and iris
4. Trochlear Ans✓✓✓ Superior oblique muscle of eye
5. Trigeminal Ans✓✓✓ Sensory for forehead Face and eyes
6. Abducens Ans✓✓✓ - Lateral rectus muscle of eye
7. Facial Ans✓✓✓ Facial expressions and taste buds
8. Vestibulocochlear Ans✓✓✓ Equilibrium and hearing
9. Glossopharyngeal Ans✓✓✓ pharynx , tonsils , salivary , posterior
tongue
Action of NT controlled by Ans✓✓✓ Enzymes ,Recycle,
Neuromodulators
,Action potentials propagate along the axon via Ans✓✓✓ a .
Continuous propagation- occurs in unmyelinated axons . A series of
local current membrane depolarizations propagate the action potential
down the axon membrane
b. Saltatory propagation- occurs in myelinated axons. Ions can not flow
through myelin so ions cross at nodes
Alzheimer's Ans✓✓✓ decrease in acetylcholine causes memory loss ,
dementia and death
anaxonic neuron Ans✓✓✓ Dendrites & axons indistinguishable.
Limited to brain & sense organs
Arachnoid mater- Ans✓✓✓ Avascular membrane that reabsorbs
cerebrospinal fluid
Association ( interpretive ) areas Ans✓✓✓ not directly involved with
sensory or motor functions . Found in all lobes
Association ( interpretive ) areas Function Ans✓✓✓ A. Interpret
sensory information B. Memory
C. Emotions
D. Problem solving
E. Speech Conceptualization of consequence ( not mature in males until
25 )
, Autonomic ( involuntary ) functions of the Cerebellum Ans✓✓✓ 1.
Balance
2. Coordination of skeletal muscles
3. Posture
4. Integration possibly learning and memory )
Autonomic divides into Ans✓✓✓ 1. Sympathetic division - Moves body
away from homeostatic set point
2. Parasympathetic division - Moves body back toward homeostatic set
point.
Basal nuclei in M.O regulate Ans✓✓✓ A. Heart rate
B. Blood pressure
C. Respiration
bipolar neurons Ans✓✓✓ two processes (axon and dendrite) one at
each ends. E.g., eyes, nose, and ears
Brain divions Ans✓✓✓ a . Cerebrum
b . Cerebellum
c . Diencephalon
d . Brain stem
