ch 2: Respiratory system

Question 1

When Diaphragm contracts

Answer 1

-The central tendon is pulled downward
-expands the thoracic cavity inferiorly (inspiration) (increases vertical dimension of thorax)
-compresses abdominal viscera

Question 2

Respiratory pathway

Answer 2

• Nasal/oral cavity
• Pharynx
• Larynx
• Trachea
• Bronchii
• Lungs (Alveoli)
  Never play loud tunes, bring lots of air

Question 3

function of inspiration

Answer 3

involves bringing oxygen
to the body’s cells by breathing in
-expansion of lungs
-elevates rib cage
-diaphragm contracts (goes down)
-pressure of lungs lowered, air rushes in

Question 4

function of expiration

Answer 4

involves eliminating
carbon dioxide from the body’s cells
by breathing out
-contraction of lungs
-pressure of lungs is raised

Question 5

If pressure within the lungs is
lowered (lungs expand), air in the
atmosphere will

Answer 5

rush in

Question 6

If pressure within lungs is raised
(lungs contract), air will escape

Answer 6

to the atmosphere

Question 7

clavicular breathing

Answer 7

-Respiration can be maintained solely using
accessory muscles following stroke/disease that paraluzed diaphragm
-Externally stabilizing the accessory
structures may help (e.g., holding onto
something to stabilize the arms for the
action of the Pectoralis and Trapezius)

Question 8

parts of the lungs

Answer 8

-sCostal (parietal) pleurae –
inner surface of rib cage
-Visceral pleurae – surface of
the lungs