During an Arctic research expedition, a scientist is exposed to freezing temperatures. Their body initiates thermoregulatory mechanisms, such as shivering and vasoconstriction, to maintain core temperature. At the same time, the physical exertion of walking through deep snow causes an increase in blood carbon dioxide (CO2\text{CO}_2CO2) concentration, stimulating an increase in heart rate and breathing rate to maintain oxygen delivery to tissues.
Which of the following correctly pairs the brain regions responsible for coordinating these two separate physiological responses?
Thermoregulatory: Medulla oblongata; Cardiorespiratory: Hypothalamus
Thermoregulatory: Cerebrum; Cardiorespiratory: Medulla oblongata
Thermoregulatory: Hypothalamus; Cardiorespiratory: Medulla oblongata
Thermoregulatory: Hypothalamus; Cardiorespiratory: Cerebellum
39 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.