PHSI3011 06-1 Neural Control of Breathing

Question 1 of 19

1

What’s the major factor that drives breathing?

Select one of the following:

Blood CO2 level
Blood H+ level
Blood O2 level
Pacemaker-like cells
Blood pH
Vagal stimulation
Vagal inhibition

Explanation

Question 2 of 19

1

Label the blanks:

Drag an answer into the correct orange point.

Phrenic

Vagal

Inspiration

Expiration

Explanation

Question 3 of 19

1

The rate and depth of respiration are regulated by:
1 – Inputs to the respiratory centre signalling the Pco2, pH, AND Po2 of the ❌ blood;
2 – Afferent (sensory) inputs from receptors in the ❌;
3 – Inputs arising from higher centres of the brain, such as the motor cortex.

Drag and drop to complete the text.

Arterial

Venous

Lungs

Kidney

Explanation

Question 4 of 19

1

Click on the orange point and select the correct answer.

What's this bit?
(responsible for responding to CO2)

Explanation

Question 5 of 19

1

DRG = ??

Select one of the following:

Dorsal Root Ganglion
Dorsal Respiratory Group
“Dickheads are Racists” Group

Explanation

Question 6 of 19

1

VRG = ??

Select one of the following:

Ventral Root Ganglion
Ventral Respiratory Group
“Vickheads are Racists” Group

Explanation

Question 7 of 19

1

DRG neurons consist ❌, whereas VRG neurons consist of ❌.

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Mainly of inspiratory neurons

Mainly of expiratory neurons

Both inspiratory and expiratory neurons

Explanation

Question 8 of 19

1

Select from the dropdown lists to complete the text.

Neurons in the pontine “( Pneumotaxic, Apneustic ) centre” ( Inhibit, Excite ) inspiratory neurons, thus LIMITING inspiration.

Explanation

Question 9 of 19

1

Select from the dropdown lists to complete the text.

Neurons in the pontine “( Pneumotaxic, Apneustic ) centre” ( Inhibit, Excite ) inspiratory neurons, thus PROMOTING inspiration.

Explanation

Question 10 of 19

1

Select from the dropdown list to complete the text.

( Inspiration, Expiration ) is usually a passive process.

Explanation

Question 11 of 19

1

Mutations for the Phox2b transcription factor result in Congenital Central Hypoventilation Syndrome (CCHS) which causes an almost complete loss of respiratory response to what?

Select one of the following:

Increased CO2
Exercise
Arousal

Explanation

Question 12 of 19

1

True or false: Phox2b is expressed in the cerebellum.

Select one of the following:

True
False

Explanation

Question 13 of 19

1

True or false: Phox2b is not expressed in neurons above the pons.

Select one of the following:

True
False

Explanation

Question 14 of 19

1

RTN = ??

Select one of the following:

RetroTrapezoid Nucleus
Rostral Trapezoid Nucleus
RetroTrapezoid Nerves
Rostral Trapezoid Nerves

Explanation

Question 15 of 19

1

Which of the following is known as the “Hering-Breuer reflex”?

Select one of the following:

Pulmonary 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
Pulmonary 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
Increase of CO2 is sensed by the central chemoreceptors > excitation of inspiration stimulus by the VAGUS nerve
Increase of CO2 is sensed by the central chemoreceptors > excitation of inspiration stimulus by the PHRENIC nerve

Explanation

Question 16 of 19

1

Central vs Peripheral chemoreceptors. The Central chemoreceptors reside in the ❌, whereas the Peripheral chemoreceptors reside in the ❌.

Drag and drop to complete the text.

RTN

Carotid body

Explanation

Question 17 of 19

1

Central vs Peripheral chemoreceptors. The Central chemoreceptors detect ❌, whereas the Peripheral chemoreceptors detect ❌.

Drag and drop to complete the text.

HIGH CO2

LOW C02

HIGH O2

LOW O2

Explanation

Question 18 of 19

2

Select from the dropdown lists to complete the text.

Upon submersion (or irritation stimulus), the nasopharyngeal reflex (aka “diving reflex”) triggers a(n) ( Increase, Decrease ) of Sympathetic vasomotor activity, which results in ( Increased, Decreased ) TPR. It also triggers a(n) ( Increase, Decrease ) in Cardiac vagal activity, which results in a decreased HR and decreased CO. The net effect of this is ( Increased, Decreased ) Oxygen conservation.

	Created by Michael Jardine about 7 years ago

PHSI3011 06-1 Neural Control of Breathing

PHSI3011 06-1 Neural Control of Breathing

Question 1 of 19

What’s the major factor that drives breathing?

Select one of the following:

Explanation

Question 2 of 19

Label the blanks:

Drag an answer into the correct orange point.

Explanation

Question 3 of 19

The rate and depth of respiration are regulated by: 1 – Inputs to the respiratory centre signalling the Pco2, pH, AND Po2 of the ❌ blood; 2 – Afferent (sensory) inputs from receptors in the ❌; 3 – Inputs arising from higher centres of the brain, such as the motor cortex.

Drag and drop to complete the text.

Explanation

Question 4 of 19

Click on the orange point and select the correct answer.

What's this bit? (responsible for responding to CO2)

Explanation

Question 5 of 19

DRG = ??

Select one of the following:

Explanation

Question 6 of 19

VRG = ??

Select one of the following:

Explanation

Question 7 of 19

DRG neurons consist ❌, whereas VRG neurons consist of ❌.

Drag and drop to complete the text.

Explanation

Question 8 of 19

Select from the dropdown lists to complete the text.

Neurons in the pontine “Pneumotaxic Apneustic( Pneumotaxic, Apneustic ) centre” Inhibit Excite( Inhibit, Excite ) inspiratory neurons, thus LIMITING inspiration.

Explanation

Question 9 of 19

Select from the dropdown lists to complete the text.

Neurons in the pontine “Pneumotaxic Apneustic( Pneumotaxic, Apneustic ) centre” Inhibit Excite( Inhibit, Excite ) inspiratory neurons, thus PROMOTING inspiration.

Explanation

Question 10 of 19

Select from the dropdown list to complete the text.

Inspiration Expiration( Inspiration, Expiration ) is usually a passive process.

Explanation

Question 11 of 19

Mutations for the Phox2b transcription factor result in Congenital Central Hypoventilation Syndrome (CCHS) which causes an almost complete loss of respiratory response to what?

Select one of the following:

Explanation

Question 12 of 19

True or false: Phox2b is expressed in the cerebellum.

Select one of the following:

Explanation

Question 13 of 19

True or false: Phox2b is not expressed in neurons above the pons.

Select one of the following:

Explanation

Question 14 of 19

RTN = ??

Select one of the following:

Explanation

Question 15 of 19

Which of the following is known as the “Hering-Breuer reflex”?

Select one of the following:

Explanation

Question 16 of 19

Central vs Peripheral chemoreceptors. The Central chemoreceptors reside in the ❌, whereas the Peripheral chemoreceptors reside in the ❌.

Drag and drop to complete the text.

Explanation

Question 17 of 19

Central vs Peripheral chemoreceptors. The Central chemoreceptors detect ❌, whereas the Peripheral chemoreceptors detect ❌.

Drag and drop to complete the text.

Explanation

Question 18 of 19

Select from the dropdown lists to complete the text.

Explanation

Question 19 of 19

Diving results in:

Select one of the following:

Explanation

The rate and depth of respiration are regulated by:
1 – Inputs to the respiratory centre signalling the Pco2, pH, AND Po2 of the ❌ blood;
2 – Afferent (sensory) inputs from receptors in the ❌;
3 – Inputs arising from higher centres of the brain, such as the motor cortex.

What's this bit?
(responsible for responding to CO2)

Neurons in the pontine “( Pneumotaxic, Apneustic ) centre” ( Inhibit, Excite ) inspiratory neurons, thus LIMITING inspiration.

Neurons in the pontine “( Pneumotaxic, Apneustic ) centre” ( Inhibit, Excite ) inspiratory neurons, thus PROMOTING inspiration.

( Inspiration, Expiration ) is usually a passive process.