Which micronutrient is most closely associated with blood clotting?
Vitamin B6
Vitamin K
Folate
Vitamin B12
The Correct Answer is B
A. Vitamin B6, also known as pyridoxine, is involved in amino acid metabolism, neurotransmitter synthesis, and hemoglobin production. While it is important for overall health and proper blood function, it does not directly participate in the blood clotting process, so deficiency does not cause bleeding disorders.
B. Vitamin K is the micronutrient most directly involved in blood clotting (coagulation). It is a fat-soluble vitamin that acts as a coenzyme for the liver enzymes responsible for producing clotting factors, including prothrombin (factor II), and factors VII, IX, and X. Without sufficient vitamin K, the synthesis of these proteins is impaired, leading to an increased risk of excessive bleeding, bruising, or hemorrhage. Vitamin K can be obtained from green leafy vegetables, broccoli, Brussels sprouts, and certain vegetable oils, and it is also synthesized by beneficial gut bacteria. Newborns are particularly at risk for vitamin K deficiency, which is why vitamin K injections are routinely given at birth to prevent bleeding disorders.
C. Folate (vitamin B9) is crucial for DNA synthesis and red blood cell formation, supporting growth and development, particularly during pregnancy. While folate deficiency can cause megaloblastic anemia, it does not have a direct role in coagulation or the clotting cascade.
D. Vitamin B12 is essential for red blood cell maturation and neurological function. Deficiency can also lead to anemia and neurological symptoms but does not impact clotting.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Menopause is the natural cessation of menstruation in women, typically occurring around age 50. While it involves hormonal changes and can affect bone density, metabolism, and cardiovascular health, it does not impair swallowing or directly affect nutrition intake.
B. Taste threshold refers to the sensitivity of the taste buds to detect flavors. Although aging can alter taste perception, it does not cause difficulty swallowing or lead directly to inadequate nutrition.
C. Fibromyalgia is a chronic disorder characterized by widespread musculoskeletal pain, fatigue, and tender points. While it can affect quality of life, it does not directly impair swallowing or nutritional intake.
D. Dysphagia is a disorder that affects swallowing, making it difficult or painful to move food or liquid from the mouth to the stomach. It is common among older adults due to age-related changes, neurological disorders (such as stroke or Parkinson’s disease), or structural abnormalities. Dysphagia increases the risk of malnutrition, dehydration, and aspiration pneumonia, making proper diagnosis and management essential for maintaining adequate nutrition.
Correct Answer is B
Explanation
A. A diabetic diet focuses on controlling blood glucose and carbohydrate intake to manage diabetes. While it supports metabolic health, it has not been specifically shown to reduce rates of cardiovascular disease or cognitive decline to the extent seen with the Mediterranean diet.
B. The Mediterranean diet emphasizes fruits, vegetables, whole grains, legumes, nuts, olive oil, and fish, with moderate consumption of dairy and minimal red meat. This diet is rich in antioxidants, monounsaturated fats, and omega-3 fatty acids, which contribute to improved heart health by reducing inflammation, lowering LDL cholesterol, and supporting endothelial function. Numerous studies also suggest the Mediterranean diet may reduce the risk of cognitive decline and neurodegenerative diseases like Alzheimer’s, likely due to its anti-inflammatory and neuroprotective nutrient profile.
C. The ketogenic (keto) diet is high in fat and very low in carbohydrates, which can help with weight loss and blood sugar control. However, its long-term effects on cardiovascular health are still debated, and it has not been conclusively shown to reduce cognitive decline. Some studies even suggest potential risks due to high saturated fat intake.
D. A vegetarian diet excludes meat and sometimes other animal products, which can reduce saturated fat intake and support heart health. However, while vegetarian diets can improve cardiovascular risk factors, they do not consistently demonstrate the same broad, evidence-backed reductions in cardiovascular disease and cognitive decline as the Mediterranean diet, which includes a balanced mix of plant and healthy animal foods.
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