Across
- 1. A neuron connecting sensory neurons to motor neurons within the CNS
- 5. A chemical messenger that crosses the synaptic gap between neurons
- 6. A neurotransmitter that decreases the likelihood of a neuron firing
- 9. A reflex response to perceived threat involving physiological changes
- 10. A neuron carrying information from sensory receptors to the CNS
- 11. Part of the adrenal gland that releases adrenaline into the bloodstream
- 14. The master gland controlling other endocrine glands
- 16. The division of the ANS that restores the body to resting state after stress
- 19. The long fibre that carries impulses away from the cell body of a neuron
- 20. A fatty layer surrounding the axon to protect it and speed up transmission
- 21. The division of the ANS that prepares the body for fight or flight
- 23. Chemical messengers released by glands affecting organs and behaviour
- 24. The network of nerves outside the CNS carrying messages to and from the body
Down
- 2. The part of the PNS controlling automatic functions like breathing and heart rate
- 3. A neurotransmitter that increases the likelihood of a neuron firing
- 4. The brain and spinal cord responsible for processing and responding to information
- 7. Brain area detecting threats and triggering the stress response
- 8. A system of glands that secrete hormones into the bloodstream
- 12. A neuron carrying signals from the CNS to muscles and glands
- 13. The process where neurotransmitters carry signals across a synapse
- 15. A hormone released by the adrenal glands preparing the body for fight or flight
- 17. The part of the PNS responsible for voluntary movement of skeletal muscles
- 18. Branch-like structures that receive messages from other neurons
- 22. A specialised cell transmitting electrical impulses in the nervous system
