Biology

3. chemical substances that act like messenger molecules in the body.
4. tiny air sacs of the lungs which allow for rapid gaseous exchange.
6. the condition in which all acting influences are balanced or cancelled by equal opposing forces, resulting in a stable system.
8. a tubular structure carrying blood through the tissue and organs; vein, artery and capillary.
11. the organs involved in respiration; transporting oxygen and removing carbon dioxide; nose, trachea, bronchi, lungs, etc.
14. a large gland behind the stomach which secretes the hormones called insulin and glucagon into the blood.
17. 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.
18. a part of the cell responsible for growth and reproduction
19. the organs and tissues involved in circulation blood through the body

1. 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.
2. occurs to maintain homeostasis – change in the rate of hormone production to oppose the effects of the hormone.
5. part of a neuron that carries a nerve impulse away from the cell body.
7. an action that is performed without conscious thought as a response to a stimulus.
9. tube reinforced by rings of cartilage which connects the throat to the lungs.
10. metabolic equilibrium maintained by biological mechanisms
12. the nervous system outside the brain and spinal cord.
13. a thin membrane enclosing the cytoplasm of a cell
15. complex of nerve tissues that controls the activities of the body.
16. a hormone produced in the pancreas which regulates the amount of glucose in the blood.