Human Health and Nutrition

An average adult human has approximately 5-6 liters of blood, which is about 7% of their body weight. This volume is essential for transporting oxygen, nutrients, and waste products. 3-4 liters is too low for an adult. 8-12 liters would be abnormally high and could indicate medical conditions.

An average adult human requires about 550 liters (approximately 88 pounds or 40 kg) of oxygen per day. This is based on resting oxygen consumption of about 250-350 ml/min. 88 pounds is a scientifically reasonable estimate.

The correct answer is C (3.25 pounds), representing average daily food intake. An adult typically consumes 3-4 pounds of food and beverages per day; 3.25 pounds falls within this normal range. Options A (3.35 lbs) and B (3.15 lbs) are close but incorrect values, while D (3.05 lbs) is slightly below typical intake.

A normal adult human has 5-6 liters of blood, which is approximately 7% of body weight. This volume supports oxygen transport and circulation; higher ranges (8-12L) would exceed normal physiological limits.

The human brain receives approximately 750 milliliters of blood per minute, representing about 15-20% of total cardiac output despite being only 2% of body weight. This high blood flow is necessary to supply the brain's oxygen and glucose demands for proper function.

The condition associated with antibody production against a person's own cells is termed as autoimmunity.

Yes, it is the correct answer. Hemophila A is associated with episodes of bleeding. Current treatment involves infusion of factor VIII to promote blood clotting during a bleeding episode.

Blood pressure is the pressure exerted by circulating blood upon the walls of blood vessels. It is measured in millimeters of mercury (mmHg). During each heartbeat, the blood pressure varies between a maximum (systolic) and a minimum (diastolic) pressure. A healthy person has a blood pressure below 120 over 80 (120/80).

  Abnormally increased concentration of haemoglobin in the blood is polycyathemia

This patient has Hb 11.6 g/dL which is normal for an adult woman (normal range is approximately 12-16 g/dL, but 11.6 is acceptable and not true anemia). With normal O/E (likely meaning other parameters) and long-term iron supplementation showing no improvement, the issue is likely physiological variation or thalassemia trait. Continuing iron therapy risks iron overload and is unnecessary. Discontinuing iron is appropriate since there is no true deficiency.

Three meals per day for seven days (a normal week): 3 × 7 = 21 meals. This combines multiplication with time calculation.

Recommended calcium per day during pregnancy is 1200 mg/day.

The stomach when completely full can be stretched to hold about 2 to 3 litres of food. The average time for gastric emptying is about 4 hours that varies according to the quantity and type of food consumed. A light meal can be emptied from the stomach in about 2 hours, while a large heavy meal may require up to 6 hours.

It is the tidal volume.

The body's requirement of protein (for an adult) is 1 gram per kilogram of body mass.  The body's requirement of protein (for an adult) is 1 gram per kilogram of body mass.