Food Security and Climate Change — MCQs
Not under millennium development goals?
Which of the following statements is incorrect regarding the strategic plan for malaria control 2012-2017?
Which of the following is a primary determinant of undernutrition?
Which macronutrient has the highest thermogenic effect?
You are working in a primary health center (PHC) situated in a high seismic zone. Which of the following actions should you take as part of preparedness for an emergency?
In human beings, the least useful physiological response to low environmental temperature is:
Which of the following is a direct health impact of climate change?
Which of the following is not included in the Global Hunger Index?
Coarctation of aorta is most commonly associated with?
Warmth sensation is sensed by
Food Security and Climate Change Indian Medical PG Practice Questions and MCQs
Question 1: Not under millennium development goals?
- A. Eradication of extreme poverty
- B. Global partnership for development
- C. Reduction of cardiovascular health hazards (Correct Answer)
- D. Sustainability of the environment
Explanation: ***Reduction of cardiovascular health hazards*** - The **Millennium Development Goals (MDGs)** focused on broader health issues like poverty, hunger, maternal and child health, and infectious diseases, rather than specific non-communicable diseases. - While improving health was a core tenet, specific targets for reducing **cardiovascular disease** burdens were not explicitly listed as one of the eight MDGs. *Eradication of extreme poverty* - This was the **first and overarching goal** of the MDGs, aiming to halve the proportion of people living on less than $1.25 a day by 2015. - It included targets related to **employment** and **hunger reduction**. *Global partnership for development* - This was the **eighth and final goal** of the MDGs, emphasizing international cooperation to achieve the other goals. - It focused on issues such as **aid, debt relief**, and **access to technology**. *Sustainability of the environment* - This was one of the **seven major MDGs (Goal 7)**, aiming to integrate principles of sustainable development into country policies and programs. - It included targets related to **reducing biodiversity loss** and increasing access to safe drinking water.
Question 2: Which of the following statements is incorrect regarding the strategic plan for malaria control 2012-2017?
- A. 50% reduction in mortality by 2017
- B. Objective is API < 1 per 10,000 (Correct Answer)
- C. Complete treatment to 100% of patients
- D. Annual incidence < 1 per 1000 by 2017
Explanation: ***Objective is API < 1 per 10,000*** - The correct objective for the **Annual Parasite Incidence (API)** in the 2012-2017 strategic plan for malaria control was to reduce it to **less than 1 per 1,000 population**, not 1 per 10,000, making this statement incorrect. - This metric measures the number of new malaria cases per 1,000 people per year. *50% reduction in mortality by 2017* - A key objective of the **National Framework for Malaria Elimination in India** (which this strategic plan aimed to contribute to) was indeed to achieve a significant reduction in malaria-related mortality. - Specifically, aiming for a **50% reduction in mortality** by 2017 was a stated goal to lessen the disease burden. *Annual incidence < 1 per 1000 by 2017* - One of the primary goals of the **Malaria Control Strategic Plan 2012-2017** was to reduce the annual parasite incidence (API) to **less than 1 per 1,000 population** in all endemic areas. - This target focused on decreasing the occurrence of new malaria cases. *Complete treatment to 100% of patients* - A core component of malaria control strategies emphasizes ensuring that **all confirmed malaria cases** receive complete and effective treatment. - Achieving **100% complete treatment adherence** is crucial to prevent drug resistance and eliminate the parasite reservoir.
Question 3: Which of the following is a primary determinant of undernutrition?
- A. Infections
- B. Low birth weight
- C. Less water intake
- D. Low food intake (Correct Answer)
Explanation: ***Low food intake*** - **Low food intake**, meaning insufficient consumption of food, directly leads to a lack of essential nutrients and energy, which is the most fundamental cause of **undernutrition**. - This can be due to various factors like poverty, food insecurity, poor dietary choices, or conditions causing appetite loss, all converging on inadequate nutrient supply. *Low birth weight* - **Low birth weight** is often a *consequence* or a *marker* of undernutrition in the mother or during fetal development, rather than a primary determinant of subsequent undernutrition itself. - While it increases the risk of health problems, including future undernutrition, it's not the initial cause of nutrient deficiency. *Infections* - **Infections** can *exacerbate* undernutrition by increasing nutrient requirements, impairing nutrient absorption, and causing appetite loss. - However, infections are often risk factors or consequences of an already weakened nutritional state, rather than the initial, direct cause of a nutrient deficit. *Less water intake* - **Less water intake** primarily leads to **dehydration**, which affects overall health and nutrient transport but is not a direct cause of **undernutrition** (i.e., a lack of essential calories, proteins, vitamins, and minerals). - While hydration is crucial for health, it is distinct from the intake of macronutrients and micronutrients that define nutritional status.
Question 4: Which macronutrient has the highest thermogenic effect?
- A. Fat
- B. Proteins (Correct Answer)
- C. Carbohydrate
- D. Alcohol
Explanation: ***Proteins*** - Proteins have the **highest thermogenic effect** (also known as the **thermic effect of food** or TEF) among macronutrients, typically ranging from **20-30%** of their caloric content. - This high TEF is due to the energy required for their **digestion**, **absorption**, and **metabolism** (e.g., deamination, protein synthesis), making them more metabolically "expensive" to process than fats or carbohydrates. *Fat* - Fat has the **lowest thermogenic effect**, accounting for approximately **0-3%** of its caloric content. - This low TEF is because fats are **easily absorbed** and stored, requiring minimal energy for their processing. *Carbohydrate* - Carbohydrates have an intermediate thermogenic effect, typically ranging from **5-10%** of their caloric content. - The energy expenditure for carbohydrate metabolism involves processes like **digestion**, **absorption**, and **glucose oxidation** or conversion to glycogen. *Alcohol* - While alcohol has a relatively high thermogenic effect (**20-25%**), it is **not classified as a macronutrient** in traditional nutritional science. - The three primary macronutrients are proteins, carbohydrates, and fats. Among these, **proteins** have the highest TEF.
Question 5: You are working in a primary health center (PHC) situated in a high seismic zone. Which of the following actions should you take as part of preparedness for an emergency?
- A. Ensure all financial and other resources are available for disaster preparedness.
- B. Increase public awareness through campaigns and loudspeakers.
- C. Follow instructions given over the phone or radio by higher officials.
- D. Conduct a simulation for the disaster and assess the response. (Correct Answer)
Explanation: ***Conduct a simulation for the disaster and assess the response.*** - **Simulation exercises** are crucial for testing the effectiveness of a disaster preparedness plan and identifying weaknesses in the response system. - This allows for refinement of protocols, training of personnel, and ensuring that all team members understand their roles during an actual emergency. *Ensure all financial and other resources are available for disaster preparedness.* - While important for effective disaster management, simply "ensuring" resources are available is not an action of preparedness, but rather an **enabling condition**. - This statement focuses on the availability of resources rather than a proactive step to prepare the PHC for an emergency. *Increase public awareness through campaigns and loudspeakers.* - **Public awareness campaigns** are vital for community preparedness, but this action is primarily for the general population and not a specific preparedness action for the PHC itself in terms of its operational readiness. - While a PHC might be involved in public awareness, its core preparedness involves internal actions to ensure its functionality during a disaster. *Follow instructions given over the phone or radio by higher officials.* - This describes a reaction during or immediately before a disaster, rather than a proactive **preparedness measure**. - Relying solely on real-time instructions from higher officials during an emergency without prior planning can lead to delays and inefficiencies.
Question 6: In human beings, the least useful physiological response to low environmental temperature is:
- A. Shivering
- B. Vasoconstriction
- C. Release of thyroxine
- D. Piloerection (Correct Answer)
Explanation: ***Piloerection*** - **Piloerection**, or 'goosebumps,' is a vestigial reflex in humans, meaning it has lost most of its original function. - While it causes hair to stand on end, which would trap an insulating layer of air in furry animals, humans lack sufficient body hair for this to be an **effective heat retention mechanism**. *Shivering* - **Shivering** involves involuntary muscle contractions that generate heat through increased metabolic activity. - This is a highly effective and significant physiological response for **acute heat production** in response to cold. *Vasoconstriction* - **Vasoconstriction** of peripheral blood vessels reduces blood flow to the skin, thereby decreasing heat loss to the environment through conduction, convection, and radiation. - This is a crucial mechanism for **conserving core body heat** in cold conditions. *Release of thyroxine* - The **release of thyroxine** (thyroid hormone) increases the body's basal metabolic rate over a longer term, leading to increased heat production. - This is an important **adaptive response to prolonged cold exposure**, rather than an immediate one.
Question 7: Which of the following is a direct health impact of climate change?
- A. Heat-related illnesses (Correct Answer)
- B. Food insecurity and malnutrition
- C. Injuries from extreme weather events
- D. Increased vector-borne diseases
Explanation: ***Heat-related illnesses*** - Heat-related illnesses such as **heat stroke, heat exhaustion, and heat cramps** are direct health impacts of climate change resulting from increased frequency and intensity of **heat waves**. - Rising global temperatures directly increase the risk of **hyperthermia**, particularly among vulnerable populations including the elderly, children, outdoor workers, and those with chronic diseases. - This is considered a **primary direct health impact** as it results immediately from temperature changes without intermediate pathways. *Increased vector-borne diseases* - While vector-borne diseases (malaria, dengue, chikungunya) do increase with climate change due to expanded geographic range and breeding seasons of vectors, this is considered an **indirect health impact**. - Climate change affects vector ecology through temperature, rainfall, and humidity changes, which then influences disease transmission - involving an intermediate biological pathway. *Food insecurity and malnutrition* - Food insecurity and malnutrition are significant health consequences of climate change but are classified as **indirect impacts**. - They result from climate change effects on **agricultural productivity**, crop yields, food distribution systems, and water availability - multiple intermediate pathways exist between climate change and the health outcome. *Injuries from extreme weather events* - While injuries and deaths from extreme weather events (floods, cyclones, droughts) are important health impacts of climate change, they are often categorized differently from heat-related illnesses. - Heat-related illnesses represent the most **direct physiological response** to the primary manifestation of climate change (rising temperatures), making it the best answer for a "direct" health impact.
Question 8: Which of the following is not included in the Global Hunger Index?
- A. Undernourishment
- B. Under 5 mortality rate
- C. Child undernutrition
- D. Infant Mortality Rate (IMR) (Correct Answer)
Explanation: ***Infant Mortality Rate (IMR)*** - The **Infant Mortality Rate (IMR)** measures deaths of infants under one year of age and is an indicator of overall community health and access to medical care, but it is **not directly included** in the GHI calculation. - While related to health and well-being, the GHI focuses on direct measures of **food insecurity** and its immediate consequences on children. *Undernourishment* - **Undernourishment**, defined as the proportion of the population that is consuming insufficient caloric energy, is a **direct component** of the GHI. - It reflects the overall **food supply** and access at the population level. *Under 5 mortality rate* - The **Under-5 Mortality Rate** (child mortality) is a key indicator in the GHI, reflecting the fatal consequences of a combination of **inadequate nutrition** and unhealthy environments. - It captures deaths of children before their fifth birthday, which can be heavily influenced by **nutritional status**. *Child undernutrition* - **Child undernutrition** is represented in the GHI by two indicators: **child stunting** (low height for age) and **child wasting** (low weight for height). - These are crucial measures reflecting **chronic** and **acute undernutrition** in children, respectively.
Question 9: Coarctation of aorta is most commonly associated with?
- A. PDA
- B. Bicuspid aortic valve (Correct Answer)
- C. VSD
- D. ASD
Explanation: ***Bicuspid aortic valve*** - A **bicuspid aortic valve** is found in 50-80% of patients with coarctation of the aorta [1]. - This association is due to shared developmental pathways during embryogenesis. *PDA* - A patent ductus arteriosus (PDA) can coexist with coarctation, but it is not the most common associated anomaly. - PDA allows for shunting of blood, which can sometimes mask the severity of coarctation in neonates. *VSD* - A ventricular septal defect (VSD) is a common congenital heart defect but is less frequently associated with coarctation of the aorta compared to a bicuspid aortic valve. - While VSDs can occur with various congenital heart conditions, the embryological link is not as strong. *ASD* - An atrial septal defect (ASD) is a common congenital heart anomaly but is not the most common defect associated with coarctation of the aorta [1]. - ASDs are more often found in isolation or with other shunting lesions.
Question 10: Warmth sensation is sensed by
- A. Meissner's corpuscle
- B. Ruffini end organ (Correct Answer)
- C. Pacinian corpuscle
- D. Krauses end bulb
Explanation: ***Ruffini end organ*** *(Classical teaching - historically associated with warmth)* - **Ruffini corpuscles** are slow-adapting mechanoreceptors (Type II) located deep in the dermis and subcutaneous tissue. - **Classically taught** as receptors for warmth sensation, though their primary function is sensing **skin stretch, sustained pressure, and joint position**. - **Modern understanding:** Warmth is primarily sensed by **free nerve endings** with **TRPV3 and TRPV4 ion channels** (activated at 30-43°C), not by specialized encapsulated receptors. - This question tests classical receptor classification commonly found in traditional physiology curricula. *Meissner's corpuscle* - **Meissner's corpuscles** are rapidly adapting mechanoreceptors (Type I) located in dermal papillae. - Specialized for detecting **light touch and low-frequency vibration** (flutter), not temperature. *Pacinian corpuscle* - **Pacinian corpuscles** are rapidly adapting mechanoreceptors found deep in dermis and subcutaneous tissue. - Highly sensitive to **high-frequency vibration and deep pressure**, not temperature. *Krauses end bulb* - **Krause's end bulbs** were historically thought to be cold receptors, but their function remains unclear. - **Modern understanding:** Cold sensation is mediated by **free nerve endings** with **TRPM8 ion channels** (activated at 8-28°C), not by this corpuscle.
Want unlimited practice?
Get full access to all questions, explanations, and performance tracking.
Start For Free