Quiz
PHSI3011 06-1 Neural Control of Breathing
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Questions in this quiz (19)
1What’s the major factor that drives breathing?
- ABlood CO2 level
- BBlood H+ level
- CBlood O2 level
- DPacemaker-like cells
- EBlood pH
- FVagal stimulation
- GVagal inhibition
2Label the blanks:
- APhrenic
- BVagal
- CInspiration
- DExpiration
3The rate and depth of respiration are regulated by:
1 – Inputs to the respiratory centre signalling the Pco2, pH, AND Po2 of the [blank_start]__________[blank_end] blood;
2 – Afferent (sensory) inputs from receptors in the [blank_start]__________[blank_end];
3 – Inputs arising from higher centres of the brain, such as the motor cortex.- AArterial
- BVenous
- CLungs
- DKidney
4What's this bit?
(responsible for responding to CO2)
- ARetroTrapezoid Nucleus (RTN)
- BRetroTrapezoid Fibrillary Medulla (RTFM)
5DRG = ??
- ADorsal Root Ganglion
- BDorsal Respiratory Group
- C“Dickheads are Racists” Group
6VRG = ??
- AVentral Root Ganglion
- BVentral Respiratory Group
- C“Vickheads are Racists” Group
7DRG neurons consist [blank_start]__________[blank_end], whereas VRG neurons consist of [blank_start]__________[blank_end].
- AMainly of inspiratory neurons
- BMainly of expiratory neurons
- CBoth inspiratory and expiratory neurons
8Neurons in the pontine “[blank_start]__________[blank_end] centre” [blank_start]__________[blank_end] inspiratory neurons, thus LIMITING inspiration.
- APneumotaxic
- BApneustic
- CInhibit
- DExcite
9Neurons in the pontine “[blank_start]__________[blank_end] centre” [blank_start]__________[blank_end] inspiratory neurons, thus PROMOTING inspiration.
- APneumotaxic
- BApneustic
- CInhibit
- DExcite
10[blank_start]__________[blank_end] is usually a passive process.
- AInspiration
- BExpiration
11Mutations for the Phox2b transcription factor result in Congenital Central Hypoventilation Syndrome (CCHS) which causes an almost complete loss of respiratory response to what?
- AIncreased CO2
- BExercise
- CArousal
12True or false: Phox2b is expressed in the cerebellum.
- ATrue
- BFalse
13True or false: Phox2b is not expressed in neurons above the pons.
- ATrue
- BFalse
14RTN = ??
- ARetroTrapezoid Nucleus
- BRostral Trapezoid Nucleus
- CRetroTrapezoid Nerves
- DRostral Trapezoid Nerves
15Which of the following is known as the “Hering-Breuer reflex”?
- APulmonary stretch receptors are excited as the lungs inflate > nerve impulses to the respiratory centre in brainstem via nerve fibres in the VAGUS nerve > inhibition of inspiration
- BPulmonary stretch receptors are excited as the lungs inflate > nerve impulses to the respiratory centre in brainstem via nerve fibres in the PHRENIC nerve > inhibition of inspiration
- CIncrease of CO2 is sensed by the central chemoreceptors > excitation of inspiration stimulus by the VAGUS nerve
- DIncrease of CO2 is sensed by the central chemoreceptors > excitation of inspiration stimulus by the PHRENIC nerve
16Central vs Peripheral chemoreceptors. The Central chemoreceptors reside in the [blank_start]__________[blank_end], whereas the Peripheral chemoreceptors reside in the [blank_start]__________[blank_end].
- ARTN
- BCarotid body
17Central vs Peripheral chemoreceptors. The Central chemoreceptors detect [blank_start]__________[blank_end], whereas the Peripheral chemoreceptors detect [blank_start]__________[blank_end].
- AHIGH CO2
- BLOW C02
- CHIGH O2
- DLOW O2
18Upon submersion (or irritation stimulus), the nasopharyngeal reflex (aka “diving reflex”) triggers a(n) [blank_start]__________[blank_end] of Sympathetic vasomotor activity, which results in [blank_start]__________[blank_end] TPR. It also triggers a(n) [blank_start]__________[blank_end] in Cardiac vagal activity, which results in a decreased HR and decreased CO. The net effect of this is [blank_start]__________[blank_end] Oxygen conservation.
- AIncrease
- BDecrease
- CIncreased
- DDecreased
- EIncrease
- FDecrease
- GIncreased
- HDecreased
19Diving results in:
- ABradycardia
- BTachycardia
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- PHSI3011 06-1 Neural Control of Breathing
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- Created on 10 Nov 2017 · updated on 10 Nov 2017
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