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IB SEHS TOPIC 2 PRACTICE EXAM QUESTIONS AND ANSWERS 100% PASS

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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 ©THESTAR 2025 ALL RIGHTS RESERVED 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

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©THESTAR 2025 ALL RIGHTS RESERVED




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

, ©THESTAR 2025 ALL RIGHTS RESERVED

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

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