1. 2. tube reinforced by rings of cartilage which connects the throat to the lungs.
  2. 4. an action that is performed without conscious thought as a response to a stimulus.
  3. 7. tiny air sacs of the lungs which allow for rapid gaseous exchange.
  4. 9. the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input, sending motor commands to our muscles, and relaying the electrical signals at every step in between.
  5. 11. small gland that makes steroid hormones and adrenaline.
  6. 15. also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells or between a neuron and a muscle/gland.
  7. 16. a part of the cell responsible for growth and reproduction
  8. 17. organ part of the lymphatic system that makes white blood cells which are part of the immune system and help fight infection.
  9. 20. part of a neuron that carries a nerve impulse away from the cell body.
  10. 21. complex of nerve tissues that controls the activities of the body.
  11. 23. a hormone produced in the pancreas which regulates the amount of glucose in the blood.
  12. 24. coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity.
  13. 25. chemical substances that act like messenger molecules in the body.
  1. 1. a large gland behind the stomach which secretes the hormones called insulin and glucagon into the blood.
  2. 3. a tubular structure carrying blood through the tissue and organs; vein, artery and capillary.
  3. 5. the condition in which all acting influences are balanced or cancelled by equal opposing forces, resulting in a stable system.
  4. 6. primary endocrine organ that secretes hormones, such as melatonin.
  5. 8. the nervous system outside the brain and spinal cord.
  6. 10. occurs to maintain homeostasis – change in the rate of hormone production to oppose the effects of the hormone.
  7. 12. a disease in which the body’s ability to produce or respond to the hormone insulin is impaired, resulting in poor control of glucose levels in the blood.
  8. 13. the organs and tissues involved in circulation blood through the body
  9. 14. membrane a thin membrane enclosing the cytoplasm of a cell
  10. 18. metabolic equilibrium maintained by biological mechanisms
  11. 19. the organs involved in respiration; transporting oxygen and removing carbon dioxide; nose, trachea, bronchi, lungs, etc.
  12. 22. small pea-sized gland that plays a major role in regulating vital body functions and general wellbeing.