Across
- 4. - an electrical signal that passes rapidly along an axon
- 7. - ensuring that the actions of different parts of the body work together
- 8. - a group of receptor cells that are able to respond to a specific stimuli
- 9. - part of the brain that is involved in the control of body temperature
- 10. - a hormone secreted by the adrenal glans which prepares the body for fight or flight
- 11. - a means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors
- 12. - organs whose activity is altered by a hormone
- 13. - a cell that is specialised for conducting electrical impulses rapidly
- 15. - a series of neurones (sensory, relay and motor) that transmit electrical impulses from a receptor to an effector.
- 18. - parts of the body that respond to a stimulus; e.g. muscles and glands
- 19. - changes in the environment that can be detected by organisms
- 20. - a neurone that transmits electrical impulses from a receptor to the central nervous system
- 23. - a hormone secrete by the pancreas, which decreases blood glucose concentration
- 24. - the brain and spinal cord
- 28. - the maintenance of a constant internal environment
- 29. - glands that secrete hormones
- 30. - a neuron that transmits electrical impulses within the central nervous system
- 31. - a structure found in the skin of mammals which secretes a watery fluid onto the skin surface to reduce body temperature
- 32. - chemicals that are produced by a glad and carried in the blood, which alter the activities of their specific target organs
Down
- 1. - a long, thin, fibre of cytoplasm that extends from the cell body to a neurone
- 2. - widening of arterioles, caused by the relaxation of muscle in their walls
- 3. - short fibre of cytoplasm in a neurone
- 5. - a neurone that transmits electrical impulses from the CNS to an effector
- 6. - the conditions inside the body
- 14. - the nerves outside the brain and spinal cord
- 16. - the normal value or range of values for a particular parameter; for example, the normal range of blood glucose concentration or the normal body temperature
- 17. - a mechanism that detects a move away from the set point, and brings about actions that take back towards the set point
- 21. - a group of neuron axons lying together
- 22. - narrowing of arterioles, caused by the contraction of muscle in their walls
- 25. - cells or groups of cells that detect stimuli
- 26. - chemical reactions take place in living organisms
- 27. - a hormone secreted by the pancreas, which increases blood glucose