What happens to your breathing rate during physical activity?, It decreases, It stays the same, It increases , It stops temporarily, Which THREE structures work together to help you breathe?, Ribs, intercostal muscles, diaphragm , Heart, lungs, trachea, Alveoli, capillaries, blood vessels, Mouth, nose, throat, What happens to the diaphragm when you BREATHE IN?, It moves up, t contracts and flattens (moves down) , It stays still, It expands sideways, When the chest volume INCREASES during inhalation, what happens to the pressure inside the lungs?, A) Pressure increases, B) Pressure decreases , C) Pressure stays the same, D) Pressure becomes zero, What is the main function of GOBLET CELLS in the respiratory system?, A) To help with gas exchange, B) To produce mucus , C) To move mucus upward, D) To filter air, What is the function of CILIATED CELLS in the airways?, To produce mucus, B) To absorb oxygen, C) To move mucus and trapped particles upward , D) To increase surface area, WHY does your body need MORE oxygen during exercise? , A) To make you sweat, B) For increased cellular respiration in muscles , C) To make your heart beat faster, D) To cool down your body, What happens to the external intercostal muscles during INHALATION?, A) They relax, B) They contract and pull ribs up and out , C) They push ribs down, D) They don't move, How does increased breathing rate during exercise help with GAS EXCHANGE and DIFFUSION?, A) It brings in more oxygen and removes more carbon dioxide, maintaining concentration gradients ✓, B) It makes the alveoli bigger, C) It increases blood pressure, D) It thickens the alveolar walls, During EXHALATION, what happens to the chest volume and pressure?, A) Volume increases, pressure decreases, B) Volume decreases, pressure increases , C) Volume increases, pressure increases, D) Volume decreases, pressure decreases.

Lesson 4

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