Respiratory Physiology

Question 1

What must happen to the lungs in order for respiration to occur?

Answer 1

the lungs must increase and decrease their volume

Question 2

What must the muscles do to create space for lungs to increase and decrease in volume?

Answer 2

muscles act on thoracic cavity which is linked to lungs via plueral linkage

Question 3

So what does increasing and decreasing volume of the lungs do?

Answer 3

air moves in when we increase the volume of lungs and moves air out when we decrease the volume

Question 4

Why does air move in and out of the lungs when altering the volume?

Answer 4

because of changes in air pressure

Question 5

Air molecules have a tendency to..

Answer 5

MOVE TO EQUALIZE

Question 6

To achieve an equal force of air molecule pressure, what happens?

Answer 6

air always moves from and area of HIGH to LOW pressure

Question 7

Pressure can be altered by changing..

Answer 7

VOLUME of space molecules are in

volume changes pressure

Question 8

Boyle’s Law says..

Answer 8

pressure and volume are inversely proportional to each other

Question 9

the pressure differences between two volumes is a

Answer 9

GRADIENT

Question 10

In regards to speech, pessure changes or gradients help…

Answer 10

MOVE ARTICULATORS

creates sound sources for different phonemes

Question 11

Expanding volume of lungs

Answer 11

DECREASES air pressure inside lungs

Question 12

Constricting Volume of lungs..

Answer 12

INCREASES air pressure inside lungs

Question 13

Inhalation

Answer 13

air pressure inside of lungs must become negative so air will be forced to flow into respiratory system

Question 14

Exhalation

Answer 14

air pressure inside lungs must be higher than atmospheric pressure

because air flows high to low

Question 15

Exhalation (muscles)

Answer 15

diaphragm relaxes, external intercostals relax, allows rib cage to return to original position

lungs decrease in volume!

Question 16

Pulmonary Subdivisions are described as

Answer 16

• lung volumes and capacities

Question 17

Pulmonary Subdivisions are measured in

Answer 17

liters, mL, or cubic cm

Question 18

Lung Volumes

Answer 18

are discrete values with no overlap between each lung volume

Question 19

Lung Capacity

Answer 19

Express the functional state of the system

may include 2 or more lung volumes

Question 20

Determinants of Lung Volumes and Capacities

Answer 20

• Gender (males have greater)
• Body size
• Age (peak at 20-30)
• Strength of respiratory musculature
• Body Position (upright vs supine)
• Change to physical state of tissues (decreases due to disease)