Lecture5: Mechanics Of Respiration

Question 1

What is the Conducting zone’s function?

Answer 1

Air conduction

Question 2

What is the diff in function between conducting zone and respiratory zone?

Answer 2

Respiratory zone is also for gas exchange

Question 3

Warming is a function of?

Answer 3

The conducting zone

Question 4

Which 2 surfaces are responsible for warming?

Answer 4

Cochae and septum

Question 5

What was responsible for humdification in the nose?

Answer 5

Mucous

Question 6

By which process are particles larger than 6um filtered?

Answer 6

Turbulent Precipitation

Question 7

Smaller particles are stuck to mucous lining of the smaller bronchioles via a process called?

Answer 7

Gravitational precipitation

Question 8

The flowing of smaller particles towards the pharynx via movement of the cilia is called?

Answer 8

Mucociliary escalator

Question 9

Cough reflex is stimulated via light touch or irritation of…

Answer 9

Larynx bronchi or trachea

Question 10

Cough reflex in the Terminal bronchioles and alveoli is stimulated by?

Answer 10

Corrosive chemical substances

Question 11

How much air is rapidly expired during coughing?

Answer 11

2.5litres

Question 12

What stimulates the sneeze reflex?

Answer 12

Irritation in the nasal pathways

Question 13

What impulses initiate the sneeze reflex?

Answer 13

Efferent impulses to the 5th cranial nerve in the medulla

Question 14

What is different about the mechanism of the sneeze reflex relative to coughing?

Answer 14

Uvula is depressed

Question 15

What is responsible for phonation?

Answer 15

The Larynx

Question 16

What is responsible for Articulation?

Answer 16

Lips, tongue and soft palate

Question 17

During inspiration what happens to the mm Hg ?

Answer 17

-1, and +1 during expiration

Question 18

Is inspiration an active process?

Answer 18

Yes

Question 19

Is expiration a passive process?

Answer 19

Yes

Question 20

During Inspiration, which 2 muscles contract?

Answer 20

The diaphragm and external intercostals

Question 21

During expiration, which 2 muscles relax?

Answer 21

The Diaphragm and External intercostals

Question 22

during Forceful Expiration, which 2 muscles contract?

Answer 22

Both Abdominal and Internal intercostals

Question 23

During forced deep breathing, what might the IAP reach?

Answer 23

-70 mm hg

Question 24

Name the accessory muscles of deep breathing

Answer 24

Scalene, serratus anterior, and sternomastoid

Question 25

What is Vasalva’s maneuver?

Answer 25

Forceful expiration

Question 26

What 2 muscles are for forceful expiration?

Answer 26

Abdominal recti and internal intercostals

Question 27

What is abdominal breathing described as?

Answer 27

Breathing by movement of the diaphragmatic wall

Question 28

What is Thoracic breathing described as?

Answer 28

Breathing by movement of the chest wall

Question 29

Which breathing type is dominant in pregnancy and ascites?

Answer 29

Thoracic breathing

Question 30

The intra pleural pressure, IPP is always negative during?

Answer 30

Normal breathing

Question 31

What is the IPP at the end of inspiration?

Answer 31

-6 mm hg

Question 32

What is the IPP at resting expiratory level?

Answer 32

-2 mm hg

Question 33

Name causes of negativity of IPP

Answer 33

Elastic recoil of lung and a rigid chest wall