Respiratory System At Rest

Question 1

What is pulmonary ventilation

Answer 1

The process of breathing in and out

Question 2

What is gaseous exchange

Answer 2

The movement of 02 and C02 at the lungs and muscles by the process of diffusion

Question 3

What is diffusion

Answer 3

The movement of gas from an area of high partial pressure to an area of low pressure down a concentration gradient

Question 4

What is a Diffusion gradient

Answer 4

The difference between an area of high partial pressure and an area of low partial pressure

Question 5

What is breathing frequency and its measurements

Answer 5

-The number of breaths you take per minute
- Measured in breaths per minute

Question 6

What is Tidal volume and its unit of measurement

Answer 6

-The volume of air inspired or expired per breath
- Measured in ML

Question 7

What is the minute ventilation and its unit of measurement

Answer 7

-The volume of air inspired or expired per minute
- Measured in L/ min

Question 8

Explain the process of inspiration during rest (5 marks)

Answer 8

1) Diaphragm contracts and external intercostals contract
2) Rib cage moves up and out
3) Volume inside lungs increases
4) Pressure in lungs decreases
5) Air moves into the lungs

Question 9

Explain the process of expiration during rest ( 5 marks)

Answer 9

1) Diaphragm relaxes and external intercostals relax
2) Rib cage moves down and in
3) Volume inside lungs decreases
4) Pressure inside lungs increases
5) Air moves out of the lungs

Question 10

Explain the process of external respiration (3 marks)

Answer 10

-It is between the alveoli and the blood.
- Higher PP of 02 in alveoli than blood so diffuses down the conc gradient into the bloss
- Higher PP of C02 in blood than alveoli so diffuses down conc gradient into alveoli

Question 11

Explain the process of internal respiration

Answer 11

• Between the blood and muscles
• Higher PP of 02 in the blood than muscles so diffuses down conc gradient into the muscles
• Higher PP of C02 in muscles than blood so diffuses down conc gradient into the blood

Question 12

What are the breathing frequency units for a trained and untrained athlete

Answer 12

Untrained athlete: 12 breaths per minute

Trained athlete: 10 breaths per miy

Question 13

What are the tidal volume units for a trained and untrained athlete

Answer 13

Untrained athlete: 500ml

Trained athlete: 500ml

Question 14

What are the minute ventilation units for a untrained and trained athlete

Answer 14

Untrained athlete: 6l/min

Trained athlete: 5l/m