Relate pressure and chemical sensing to medullary control of heart rate and stroke volume.
Tę umiejętność sprawdza 9 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Which receptors detect a rise in arterial blood pressure and contribute to reflex adjustment of heart rate? A. Stretch-sensitive baroreceptors in the aortic wall B. Light receptors in the retina C. Chemoreceptors that measure only blood glucose D. Motor…
Which sequence can correctly link a chemical change in the blood to a change in heart rate? A. Lower pH → chemoreceptors → nervous signalling via the medulla → faster heart rate B. Lower pH → pressure-only receptors → secretion of antibodies → slower heart…
A runner accelerates from a walk into a sustained run. Outline two internal mechanisms that can raise the runner’s heart rate.
The medulla oblongata contributes to physiological coordination. State one of its functions.
Which signal is expected to increase heart rate as part of preparation for vigorous activity, rather than potentially increase or decrease it depending on the pathway? A. Any nervous signal from the medulla, regardless of pathway B. A fall in the body’s oxygen…
Distinguish chemoreceptors from mechanoreceptors and give one example of each.
Several regions of the brain contribute to automatic body functions. Identify one function controlled by the medulla oblongata.
Sensory cells register movement of the head. Identify the receptor class involved.
The recording covers rest, exercise from minute 6 to minute 22, and recovery. Which brain region sends autonomic signals that adjust the sinoatrial node during these changes? A. The medulla B. The pineal gland C. The thyroid gland D. Subcutaneous adipose…
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