1) Which cell type has the most mitochondria? a) bone b) cheek c) muscle d) skin 2) During inhalation the volume of the chest cavity a) decreases b) increases c) keep changing d) remains constant 3) Exhaled air compared to inhaled air has a higher concentration of a) carbon dioxide b) nitrogen c) oxygen 4) Which component of cigaretters is addictive?  a) cadium b) carbon monoxide c) carbon dioxide d) nicotine 5) Respiration occurs in which organelle? a) cytoplasm b) nucleus c) mitochondria d) vacuole 6) Which of the following is NOT produced by the cells during respiration? a) energy b) carbon dioxide c) carbon monoxide d) water 7) Gaseous exchange occurs via a) active transport b) diffusion c) osmosis d) transpiration 8) Which muscle is involved in breathing a) biceps b) circular c) diaphragm d) triceps 9) Breathing in is the same as a) exhalation b) inhalation c) respiration d) photosynthesis 10) The small air sacs found at the end of the brionchioles is called the a) aveoli b) bronchioles c) bronchus d) trachea 11) The smaller air tubes that leads to the bronchus a) aveoli b) bronchioles c) bronchus d) trachea 12) Which of the following protect the lungs? a) intercostal muscles b) diaphram c) ribs d) trachea

RESPIRATORY SYSTEM

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