The Human Body Quiz

Blood pressure is the force of blood pushing against the walls of arteries as the heart pumps it around the body. It is important because it ensures blood reaches vital organs and tissues.

During inhalation, the diaphragm contracts and moves downwards, while the intercostal muscles contract to raise the ribs, increasing the volume of the chest cavity and drawing air into the lungs.

Bile is produced by the liver and stored in the gallbladder. It emulsifies fats, breaking them down into smaller droplets, which increases the surface area for lipase enzymes to work on.

The body’s immune system responds to infection by recognising and attacking pathogens (such as bacteria or viruses) using white blood cells that produce antibodies or engulf pathogens directly.

Stimulants increase activity in the nervous system (e.g. caffeine, nicotine), while depressants slow down activity (e.g. alcohol, tranquilizers).

Carbohydrates provide a primary source of energy for the body, particularly for the brain and muscles during exercise.

The left ventricle pumps oxygenated blood to the rest of the body via the aorta, ensuring that oxygen and nutrients are delivered to tissues.

Hormones are chemical messengers that travel through the bloodstream and control various body functions, such as growth, metabolism, and reproduction by triggering specific responses in target organs.

Immunisation involves introducing a weakened or inactive form of a pathogen to the body to stimulate the production of antibodies, providing protection against future infections from the same pathogen.

The nervous system transmits electrical signals throughout the body, allowing it to respond quickly to stimuli, control movement, regulate organ function, and coordinate responses to internal and external changes.