Human Physiology Quiz - CBSE Class 11 Science

Free practice quiz: Human Physiology (CBSE Class 11 Science). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which system is responsible for the transportation of oxygen in the human body?

   1. Digestive system
   2. Respiratory system
   3. Nervous system
   4. Excretory system
   Show answer

   Answer: B. Respiratory system

   The respiratory system, including the lungs and airways, is responsible for the intake of oxygen and the expulsion of carbon dioxide. Oxygen is transported throughout the body via the circulatory system, but the respiratory system is the initial point of entry.

2. What is the role of the sinoatrial node (SA node)?

   1. Initiates heartbeat
   2. Regulates breathing rate
   3. Controls blood pressure
   4. Filters blood
   Show answer

   Answer: A. Initiates heartbeat

   The SA node is the natural pacemaker of the heart, initiating the electrical impulses that cause the heart to contract.

3. What is the function of the lymphatic system?

   1. Transport oxygen
   2. Transport blood
   3. Immune response and fluid balance
   4. Digestion
   Show answer

   Answer: C. Immune response and fluid balance

   The lymphatic system plays a crucial role in the immune system by filtering pathogens and maintaining fluid balance.

4. What are the components of blood?

   1. Plasma, red blood cells, white blood cells, platelets
   2. Only plasma and red blood cells
   3. Only red blood cells and white blood cells
   4. Plasma and white blood cells only
   Show answer

   Answer: A. Plasma, red blood cells, white blood cells, platelets

   Blood consists of plasma (fluid), red blood cells (oxygen transport), white blood cells (immune response), and platelets (clotting).

5. Discuss the role of the different parts of the nephron in urine formation.

   1. All parts have the same function
   2. Different parts have specialized functions in filtration, reabsorption, and secretion
   3. Nephron doesn't play any role in urine formation
   4. Only glomerulus is responsible for urine formation
   Show answer

   Answer: B. Different parts have specialized functions in filtration, reabsorption, and secretion

   The glomerulus filters blood, the proximal convoluted tubule reabsorbs essential substances, and the loop of Henle and distal convoluted tubule regulate water and electrolyte balance.

More quizzes

• Plant Physiology
• Structural Organization in Animals and Plants
• Cell Structure and Function
• Diversity in Living World

Browse all Biology quizzes