Test Your Knowledge: Human Physiology Quiz Challenge yourself with 11 questions on human physiology. Test your understanding of the functions and mechanisms of the human body. remus2009 published on September 17 Stacked 1/11 What is the main function of the respiratory system? Digestion Transportation Gas exchange Excretion 2/11 Which organ produces insulin in the human body? Liver Kidney Pancreas Heart 3/11 Hormones are produced by which system of the body? Integumentary system Endocrine system Skeletal system Muscular system 4/11 Which of these is NOT a function of the skeletal system? Movement Protection of internal organs Production of hormones Blood cell formation 5/11 Which part of the brain controls voluntary movements? Cerebral cortex Cerebellum Brainstem Hypothalamus 6/11 What is the function of red blood cells in the body? Fight infections Transport oxygen Produce insulin Digest food 7/11 Which of these is a function of the nervous system? Regulation of body temperature Transmission of nerve impulses Production of bile Filtering blood 8/11 In which organ does digestion of proteins begin? Liver Stomach Small intestine Pancreas 9/11 Which body system plays a key role in maintaining electrolyte balance? Reproductive system Urinary system Lymphatic system Endocrine system 10/11 What is the main function of the cardiovascular system? Excretion Transportation of nutrients and oxygen Generation of heat Production of bile 11/11 Which hormone is known as the 'stress hormone'? Cortisol Insulin Melatonin Estrogen