day 14 - respiratory system

Question 1

purpoes/function of the respiratory system

Answer 1

1) provides means of gas exchange between environment and the body/blood

2) provides means of gas exchange between blood and the cells

3) plays a role in regulation of acid/base balance during exercise (CO2 = weak acid, buildup = bad)

Question 2

conducting zone (func)

Answer 2

• conducts air to respiratory zone
• humidifies, warms, and filters air
• NO actual respiration/gas exchange

Question 3

respiration (def)

Answer 3

gas exchange at any level

Question 4

conducting zone (def)

Answer 4

trachea, bronchi, bronchioles

conducts air to respiratory zone

Question 5

respiratory zone (def)

Answer 5

respiratory bronchioles, alviolar sacks

exchange of gasses between air + blood

Question 6

respiratory zone (func)

Answer 6

exchange of gasses between air + blood

Question 7

ventalation (def)

Answer 7

movement of air in + out of lungs via changes in pressure (bulk flow)

Question 8

atmospheric pressure at sealevel

Answer 8

760 mmHg

Question 9

inspiration at rest (process)

Answer 9

• diaphram contract and pushes downward
• volume of thoracic cage increases, pressure decreases to 758 mmHg

Question 10

external intercostals (muscle action)

Answer 10

move up and out (inspiration)

Question 11

internal intercostals (muscle action)

Answer 11

move down and in (experation)

Question 12

inspiration during exercise (process)

Answer 12

• diaphram contracts etc with help of:
  a) external intercostals
  b) pectoralis minor
  c) scalenes
  d) sternocleidomastoid
• these muscles expand ripcage more and faster = greater drop in pressure and greater volume + rate of inspiration
• 758 mmHg

Question 13

expiration at rest (process)

Answer 13

• diaphram relaxes and moves upward
• decreasing thoracic cavity volume and increasing pressure in thoracic cavity – 763 mmHg

Question 14

expiration during exercise (process)

Answer 14

• diaphram relaxes etc with help of:
  a) rectus abdominus
  b) internal intercostals
  c) external + internal obliques

Question 15

resistance to airflow is largly determined by…

Answer 15

airway diameter

Question 16

respiratory control center is located in the

Answer 16

medulla oblongada

Question 17

respiratory control center in medulla oblongada receives bloodborn info from

Answer 17

• central chemoreceptors: medulla
• periferal chemoreceptors: aortic bodies, corotid bodies

Question 18

hypoxia (def)

Answer 18

low O2 levels in blood, usualy happens over 10,000 ft

inadequate oxygen levels

Question 19

Ve (def)

Answer 19

volume air expired per minute

Question 20

Ve (volume expired) is to the respiratory system as BLANK is to the cardiovascular system

Answer 20

Q (cardiac output)

Question 21

Ve equation

Answer 21

Ve = Vt * Rf

Vt = title volume = volume expired per breath
Rf/RR = respiratory frequency/rate = breaths/min