Explain how rib and diaphragm movements, with relevant muscles, produce inspiration and expiration.
Tę umiejętność sprawdza 11 zadań wzorowanych na arkuszach IB z lat 2022–2026.
A volunteer takes a deep breath within the ventilation trace. Which muscle pattern occurs at T? A. Diaphragm relaxes while both intercostal groups contract B. Diaphragm contracts and external intercostals contract while internal intercostals relax C. Diaphragm…
State the two principal muscle groups that contract more strongly or more often to raise inspired air volume per minute.
The activity of a complex organism depends on coordination between structures at several levels. (a) Outline how organelles cooperate in the synthesis and export of a secreted protein. (b) Describe the coordinated muscle actions that cause inhalation. (c)…
Explain how diaphragm contraction brings air into the lungs.
State another muscle group whose contraction contributes to inspiration.
What initiates the increase in thoracic volume during a normal inspiration? A. Air forcing the diaphragm upwards before the muscles act B. An increase in intrapulmonary pressure above atmospheric pressure C. Relaxation of all inspiratory muscles at once D.…
During a cycling exercise test, a participant’s ventilation increases as metabolic activity rises. Explain how the brain controls breathing.
Which combination occurs during a normal active inhalation? A. External intercostals relax; pressure in the lungs rises above atmospheric pressure B. External intercostals contract; pressure in the lungs falls below atmospheric pressure C. Internal…
(a) Outline the route and processes by which carbon dioxide in blood arriving at the lungs reaches the outside air. (b) Explain why final urine can contain more concentrated urea than blood plasma. (c) Compare excretion in humans with excretion in a freshwater…
(a) Outline the route and processes by which carbon dioxide in blood arriving at the lungs reaches the outside air. (b) Explain why final urine can contain more concentrated urea than blood plasma. (c) Compare excretion in humans with excretion in a freshwater…
At 2.5 s the pressure shown drives air out of the lungs. Which muscle activity would support forced expiration? A. Contraction of the diaphragm and external intercostals B. Relaxation of every respiratory muscle while thoracic volume increases C. Contraction…
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