The A.1—Communication question bank gives IB Sports, exercise and health science (SEHS - Old) students Standard Level (SL) and Higher Level (HL) authentic exam-style practice that mirrors IB Paper 1, 2, 3 structure and difficulty. Covering key syllabus areas such as core principles, advanced applications, and practical problem-solving, this resource builds confidence by training students in the same style of questions set by IB examiners. With instant solutions, detailed explanations, and syllabus-aligned practice, RevisionDojo helps students sharpen problem-solving skills and prepare effectively for mocks and final assessments. More than just practice, this question bank teaches students how to think the way IB examiners expect.
Identify two systems that collaborate to regulate ventilation.
State two factors that increase ventilation rate during intense exercise.
Describe how partial pressure gradients drive the exchange of gases during exercise.
Explain how the circulatory system compensates for increased oxygen demand during interval training.
Outline the importance of cardiovascular control centers in adapting to variable intensity workloads.
Discuss the consequences of impaired gas exchange on homeostasis and athletic performance.
State the role of the hypothalamus in temperature regulation.
Identify two internal conditions regulated by homeostatic mechanisms.
Describe how the nervous system responds to an increase in body temperature.
Describe the function of insulin in blood glucose regulation.
Explain the role of the lungs in the transport of gases during exercise.
Discuss how the endocrine and nervous systems work together to maintain homeostasis during exercise.
A long-term analysis of U.S. population data was conducted using the National Health and Nutrition Examination Survey (NHANES) from 1988 to 2015. The study evaluated glycaemic control using HbA1c levels — a biomarker that reflects average blood glucose over 2–3 months.
HbA1c is a critical indicator of glucose homeostasis and is used both in diagnosing and monitoring diabetes. The prevalence of HbA1c categories was analyzed across different age groups and between sexes for individuals with and without diabetes. Additionally, the study assessed hazard ratios (risk of adverse health outcomes such as cardiovascular disease or mortality) in relation to HbA1c levels, both in those with diagnosed diabetes and without.
Three figures summarize the findings:
Figure 1: Prevalence of HbA1c levels by sex and age group in individuals diagnosed with diabetes.
Figure 2: Prevalence of HbA1c levels by sex and age group in individuals without diabetes.
Figure 3: Hazard ratios (with 95% confidence intervals) by HbA1c group, comparing individuals with diagnosed diabetes vs. those without. HbA1c 5.0–5.6% in non-diabetics is used as the reference group.
State how the prevalence of HbA1c ≥8% changes across age groups in men.
State the primary function of hemoglobin.
Identify two byproducts of aerobic metabolism.
Describe how oxygen is transported in the blood.
Explain how the circulatory system supports muscle function during exercise.
Outline the role of capillaries in gas and nutrient exchange.
Discuss how the respiratory and cardiovascular systems interact to meet the demands of working muscles.
Blood glucose values vary depending on the timing of measurement (fasting, post-meal, random) and age group.
State the normal fasting blood glucose range.
Identify the hormone that helps reduce elevated postprandial (after-meal) blood glucose levels.
Describe two ways the body restores blood glucose levels when they fall below the normal fasting range.
Explain how insulin and glucagon work antagonistically to regulate blood glucose homeostasis.
Describe the effect of aerobic exercise on blood glucose regulation, including its interaction with insulin.
State the function of baroreceptors.
Identify two systems involved in the regulation of blood pressure.
Outline the role of the medulla oblongata in cardiovascular regulation.
Explain how the nervous system maintains blood pressure during standing.
Describe how the endocrine and nervous systems coordinate to regulate blood pressure under stress.
Discuss the importance of inter-system communication in maintaining stable blood pressure during dynamic exercise.
Identify the two types of feedback mechanisms used in homeostasis.
State two reasons why maintaining core body temperature is essential for survival.
Describe how changes in external temperature are detected and communicated to the hypothalamus.
Explain the process by which the hypothalamus regulates thermoregulation via endocrine signaling.
Outline how prolonged fluid loss during endurance activity challenges homeostasis.
Discuss how the integration of thermoregulatory, cardiovascular, and endocrine systems delays fatique and maintains homeostasis during an ultra-endurance event.
State the function of chemoreceptors.
Identify the gas primarily responsible for stimulating ventilation.
Describe how chemoreceptors respond to changes in CO2 during exercise.
Outline the role of the respiratory control center in ventilation.
Explain the importance of blood pH regulation in maintaining homeostasis.
Discuss how inter-system communication ensures adequate ventilation and circulation during high-intensity activity.
Define the term "inter-system communication."
State two examples of effectors in thermoregulation.
Outline the role of thermoreceptors in maintaining body temperature.
Explain how vasodilation helps regulate core temperature.
Describe the sequence of events that occur when body temperature rises above normal.
Discuss the importance of coordinated responses between systems to prevent overheating.
The diagram shows a homeostatic feedback loop that regulates core body temperature.
Identify the type of homeostatic mechanism shown in the diagram.
Outline the coordinated role of the nervous and muscular systems when body temperature falls below the set point.
Explain how vasodilation and sweating reduce core body temperature during physical activity.
Describe one thermoregulatory function of the cardiovascular system and one of the integumentary system.
