Control Of RESPIRATION

Question 1

What stimulates the breathing control centres?

Answer 1

1. PONS

2. MEDULLA.

Question 2

What is the function of central chemoreceptors in medulla oblongata?

Answer 2

To monitor pH(Partial pressure of CO2) of the cerebrospinal fluid(CSF)

Question 3

What is the function of peripheral chemoreceptors in aortic(relating to the aorta) and carotid(two arteries which carry blood to the head and neck).

Answer 3

To monitor Oxygen, Carbon Dioxide and the pH of blood.

Question 4

Explain how the peripheral chemoreceptors function? In more detail….

Answer 4

Sensitive to a decrease in Oxygen, Increase in Carbon Dioxide
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It has a positive influence on the respiratory centres in order to oppose the change—it sends signals to the respiratory centers that then increase in breathing rate and depth.

Question 5

Central chemoreceptors Function in more detail

Answer 5

Sensitive to increase in H+ or increase in carbon dioxide
Also has a positive influence on respiratory centres
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Makes us breathe faster and deeply.

Question 6

Function of stretch receptors in more detail

Answer 6

Found in lungs, it is Sensitive to over-inflation of the lungs

Has negative influence on respiratory centres—-sends an inhibitory signal that tell you to stop breathing in so that I can breathe out.

Question 7

What are irritant receptors?

Answer 7

Receptors that are sensitive to dust particles etc

Defensive Respiratory Reflex

Causes me to cough when exposed to dust particles…etc.

Question 8

Function of receptors in muscles and joints–~~

Answer 8

Causes the respiratory centres to increase the rate of breathing.

Question 9

Function of higher brain centres( in the cerebral cortex)

Answer 9

Voluntary control over breathing .

Question 10

What are the 2 control centres in the brain 🧠 stem?

Answer 10

PONS

MEDULLARY

Question 11

What are the 2 centres under pons respiratory centres?

Answer 11

Pneumotaxic centre

Apneustic centre

Question 12

What’s the function of the pons respiratory centre?

Answer 12

Assists in the smooth transitioning between expiration and inspiration.

It allows fine-tuning of breathing.

Question 13

What are the 2 respiratory groups of the medullary respiratory centre?

Answer 13

Dorsal respiratory group

Ventral respiratory group

Question 14

What is the dorsal respiratory group responsible for?

Answer 14

Inspiration

Question 15

What is the ventral respiratory group responsible for?

Answer 15

¶•Expiration.

Question 16

Function of the HERING-BREUER INFLATION REFLEX

Answer 16

Prevents lungs from over-inflating–stops further breathing in.

Question 17

What does the PRE-BOTZINGER COMPLEX responsible for?

Answer 17

Controls the rhythmic involuntary breathing

It stimulates the inspiratory neurons hence inspiratory motor neurons send nerve impulses(all that happens in 2 seconds)

It stops sending those nerve impulses(for 3 seconds) so that the respiratory muscles relax.