Transportation in Humans (Heart, Blood, Blood Vessels) MCQs

Q1. What is the function of insulin?

• A.Regulates carbohydrate, protein and fat metabolism
• B.Regulates blood sugar levels
• C.Stimulates growth in all organs
• D.Regulates menstrual cycle

Answer: B. Regulates blood sugar levels

Eliminate first - option A) 'Regulates carbohydrate, protein and fat metabolism' misses the point - This is the function of thyroxin hormone, not insulin; option C) 'Stimulates growth in all organs' misses the point - This is the function of growth hormone, not insulin; option D) 'Regulates menstrual cycle' fails since This is the function of oestrogen, not insulin. That leaves only option B). Confirm with the chapter rule: As mentioned in the content, insulin regulates blood sugar levels (biology, chapter 'Life Processes'). Answer: B) Regulates blood sugar levels.

Q2. Is this information enough to tell you which of the traits - blood group A or O - is dominant? Why or why not?

• A.Yes, the information is enough to tell which trait is dominant.
• B.No, the information is not enough to tell which trait is dominant.
• C.The information is enough to tell which trait is dominant, but we need more information to determine the dominant trait.
• D.The information is not enough to tell which trait is dominant, but we can determine the dominant trait by looking at the parents.

Answer: B. No, the information is not enough to tell which trait is dominant.

NCERT fact (biology, chapter 'Life Processes'): No, the information is not enough to tell which trait is dominant. Distractor analysis: option A) 'Yes, the information is enough to tell which trait is domin...' fails since The information is not enough to tell which trait is dominant; option C) 'The information is enough to tell which trait is dominant,...' is wrong because The information is not enough to tell which trait is dominant. Final answer - B) No, the information is not enough to tell which trait is dominant.

Q3. Which statement about the working of the human heart is correct?

• A.The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs
• B.The right atrium receives oxygenated blood from the lungs
• C.The left ventricle pumps deoxygenated blood to the lungs
• D.The left atrium sends deoxygenated blood to the body

Answer: A. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs