Question at position 39 How do nutrients from food actually enter the body’s tissues?By mechanical digestion in the stomachBy filtration through the kidneysThrough absorption in the digestive tractThrough enzymatic breakdown in the esophagus

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BlackTom AI · Accepted Answer

Let's break down the question by evaluating how nutrients from food actually enter the body's tissues. Each option will be considered in turn.
Option 1: 'By mechanical digestion in the stomach' — Mechanical digestion (chewing, grinding) and mixing in the stomach help physically break down food but do not by themselves move nutrients into tissues. Nutrient absorption occurs mainly after chemical processes and in the small intestine, not through mechanical action alone. So this statement is inaccurate as the primary mechanism for nutrient entry into tissues.
Option 2: 'By filtration through the kidneys' — Filtration in the kidneys is part of urine formation and involves filtering waste products from the blood, not absorbing digested nutrients into body tissues. Nutrients are typically reabsorbed along the renal tubules in a way that maintains balance, but the kidneys are not the main route for absorbing dietary nutrients into tissues. This makes this option incorrect in the context of nutrient uptake.
Option 3: 'Through absorption in the digestive tract' — This is the correct mechanism. After digestion, nutrients are absorbed across the lining of the small intestine into the bloodstream or lymphatic system, which then distributes them to tissues. This aligns with established physiology of nutrient uptake.
Option 4: 'Through enzymatic breakdown in the esophagus' — The esophagus primarily conducts bolus via peristalsis and does not involve significant enzymatic digestion or nutrient absorption. The main enzymatic digestion occurs in the stomach and small intestine, not in the esophagus, so this option is incorrect for nutrient absorption.
In summary, the pathway that explains how nutrients actually enter body tissues is absorption in the digestive tract, specifically the small intestine, followed by transport to tissues via the circulatory system or lymphatics. The other options either describe processes that are not responsible for nutrient entry into tissues or misplace where digestion and absorption occur.

Question at position 39 How do nutrients from food actually enter the body’s tissues?By mechanical digestion in the stomachBy filtration through the kidneysThrough absorption in the digestive tractThrough enzymatic breakdown in the esophagus

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