What is the main function of the brain in the human body?

• Processing sensory information and controlling motor functions

• Regulating body temperature and digestion

• Producing hormones and enzymes

• Facilitating blood circulation and respiration

What role does the small intestine play in digestion?

• It is responsible for the majority of nutrient absorption during digestion.

• It produces bile to aid in fat digestion.

• It stores undigested food until it is excreted.

• It is the primary site for the breakdown of carbohydrates.

What is the importance of the brain in maintaining homeostasis?

• The brain regulates various bodily functions, including temperature, hydration, and pH levels, to maintain a stable internal environment (homeostasis).

• The brain is responsible for processing sensory information only.

• The brain controls voluntary muscle movements but does not affect internal body functions.

• The brain's primary role is to store memories and does not play a role in homeostasis.

How do bones contribute to movement in the human body?

• Bones store calcium and other minerals.

• Bones provide a rigid structure for muscles to pull against, enabling movement at joints.

• Bones produce red blood cells for oxygen transport.

• Bones act as a cushion to absorb shock during movement.

What is the primary function of the heart?

• To pump blood throughout the body, supplying oxygen and nutrients to tissues and removing carbon dioxide and waste products.

• To filter toxins from the blood and produce urine.

• To regulate body temperature and maintain homeostasis.

• To produce hormones that control metabolism and growth.

What is the relationship between the heart and the circulatory system?

• The heart is the central organ of the circulatory system, pumping blood through a network of arteries and veins to supply the body with oxygen and nutrients.

• The heart is responsible for producing red blood cells in the circulatory system.

• The heart acts as a filter for the blood before it enters the circulatory system.

• The heart is a muscle that only pumps blood during exercise.

What is the protective function of the skull?

• The skull protects the brain from injury and provides structure to the face.

• The skull helps in the production of blood cells.

• The skull aids in the digestion of food.

• The skull is responsible for the sense of smell.

What is the role of red blood cells in relation to the heart and lungs?

• Red blood cells transport oxygen from the lungs to the body's tissues and carry carbon dioxide from the tissues back to the lungs for exhalation.

• Red blood cells are responsible for the production of hormones that regulate heart rate.

• Red blood cells help in the digestion of food by transporting nutrients to the stomach.

• Red blood cells act as a barrier to prevent infections in the lungs.

What is the significance of the diaphragm in respiration?

• It is a muscle that helps in the digestion of food.

• It separates the chest cavity from the abdominal cavity and plays a crucial role in breathing by contracting and relaxing to allow air in and out of the lungs.

• It is responsible for the production of red blood cells.

• It helps in the filtration of air before it enters the lungs.

How does the small intestine increase its surface area for absorption?

• By having a smooth inner lining

• By having folds, villi, and microvilli

• By secreting digestive enzymes

• By increasing its length during digestion