Identify chambers, valves, septum and vessels and relate their organization to pressurized one-way circulation.
Tę umiejętność sprawdza 11 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Directional processes depend on structures that constrain movement. (a) Outline how structures in the human circulatory system limit backward blood flow. (b) Explain why transmission across a chemical synapse proceeds from the presynaptic to the postsynaptic…
An erythrocyte has delivered oxygen to a hand. In what order does it subsequently pass the labelled locations before entering the aorta? A. Q→P→S→R B. P→Q→R→S C. S→R→Q→P D. R→S→P→Q
Explain how specialized heart-muscle cells initiate the heartbeat.
Two main sounds occur during a cardiac cycle. Outline their causes.
State its function.
Describe the cause of the sound as the ventricles begin to relax.
Explain how stimulation brings about atrial and ventricular contraction.
The schematic shows the chambers and major connections of a human heart. What are the functions of the structures labelled X and Y? A. X carries blood high in oxygen to the body; Y prevents backflow from the body into the aorta B. X carries blood low in oxygen…
Describe the state of the atrioventricular and semilunar valves at 0.25 s.
Explain adaptations of cardiac muscle to its function.
This schematic looks across the heart at the level of its valves. During ventricular ejection, what is the state of P, Q and R? A. P open; Q open; R closed B. P closed; Q open; R closed C. P closed; Q closed; R open D. P open; Q closed; R open
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.