IB SEHS TOPIC 2 PRACTICE EXAM
QUESTIONS AND ANSWERS 100% PASS
What is the primary function of the pulmonary system?
a) Pump blood to the body
b) Exchange oxygen and carbon dioxide
c) Digest nutrients
d) Maintain pH balance - ANS b) exchange oxygen and carbon dioxide
what structure prevents food from entering the trachea?
a) Larynx
b) Epiglottis
c) Bronchus
d) Pharynx - ANS b) epiglottis
Where does gas exchange occur in the lungs?
a) Bronchi
b) Alveoli
c) Trachea
d) Diaphragm - ANS b) alveoli
Which of the following describes inhalation at rest?
a) Passive, diaphragm relaxes
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b) Active, diaphragm contracts
c) Passive, intercostals contract
d) Active, diaphragm relaxes - ANS b) Active, diaphragm contracts
The volume of air breathed in and out in one breath is known as:
a) Residual volume
b) Tidal volume
c) Vital capacity
d) Total lung capacity - ANS b) tidal volume
Which muscle assists with forced exhalation?
a) Diaphragm
b) Internal intercostals
c) External intercostals
d) Sternocleidomastoid - ANS b) internal intercostals
What is the average resting heart rate for a healthy adult?
a) 30-50 bpm
b) 50-60 bpm
c) 60-100 bpm
d) 100-120 bpm - ANS c) 60-100 bpm
Which part of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Right ventricle
c) Left atrium
d) Left ventricle - ANS c) left atrium