Biology 1

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Across

2. Chemical messengers released by glands to regulate bodily functions.
3. _____Drugs that cause perceptual distortions.
7. Hormone involved in social bonding and childbirth.
9. _____nervous system Promotes rest and digestion.
11. _____transmission Process of sending signals between neurons.
16. Controls involuntary bodily functions AKA The Autonomic nervous system.
17. _____Symptoms experienced when stopping or reducing drug use.
18. Neurotransmitter involved in reward, motivation, and motor control.
20. _____arc Pathway for reflex actions.
21. _____potential Electrical charge across the neuron membrane when not firing.
23. _____neurons Transmit sensory information to the CNS.
25. ____neurotransmitters Chemicals that prevent neurons from firing.
29. _____potential Electrical impulse traveling down a neuron.
30. _____period Time after an action potential when a neuron can’t fire again.
31. _____nervous system Activates fight-or-flight response.
33. Connect neurons within the CNS.
34. _____Drugs that decrease neural activity and slow body functions.
35. Hormone that stimulates appetite.
36. Genetic and biological factors influencing development.
40. _____selection Process where traits that enhance survival are passed on.
44. _____predisposition Increased likelihood of developing a condition based on genetics.
45. Drugs that mimic or enhance neurotransmitter effects.
46. Neurotransmitter involved in muscle action, learning, and memory.
49. Neurotransmitters that act as natural painkillers and mood enhancers.
50. _____sclerosis Disease where the immune system attacks the myelin sheath of neurons.
54. Neurotransmitter involved in arousal and alertness.
55. _____nervous system Controls voluntary movements.
57. _____cells Support and protect neurons.
58. _____Stimulant that increases alertness.
60. _____Depressant that affects motor skills and judgment.
61. Drugs that block or reduce neurotransmitter effects.
62. _____ inhibitors Drugs that block the reabsorption of neurotransmitters.

Down

1. Neurotransmitter affecting mood, sleep, and appetite.
4. _____studies Research comparing adopted children to their biological and adoptive parents.
5. _____studies Research examining traits among family members.
6. Brain and spinal cord. AKA The Central nervous system
8. _____Drugs that increase neural activity and energy.
10. Hormone that prepares the body for fight-or-flight response.
12. Reabsorption of neurotransmitters by the sending neuron.
13. Environmental factors influencing development.
14. Major excitatory neurotransmitter involved in learning and memory.
15. Transmission of traits from parents to offspring.
19. _____Drugs that relieve pain and produce euphoria.
22. Nerves outside the CNS. AKA The Peripheral nervous system
23. ___P Neurotransmitter involved in pain perception.
24. _____Opioid that is highly addictive.
26. _____Compulsive drug use despite harmful consequences.
27. _____neurons Transmit commands from the CNS to muscles.
28. Reduction in membrane potential making a neuron more likely to fire.
32. _____Drug that can act as a depressant, stimulant, or hallucinogen.
37. Controversial practice of improving genetic quality by selective breeding.
38. _____Stimulant that increases dopamine levels.
39. Hormone that regulates sleep-wake cycles.
41. _____studies Research comparing similarities between identical and fraternal twins.
42. _____perspective How natural selection influences behavior and mental processes.
43. Major inhibitory neurotransmitter that reduces neuronal excitability.
47. Minimum stimulus needed to trigger an action potential.
48. _____Reduced response to a drug after repeated use.
51. Hormone that regulates hunger and energy balance.
52. _____neurotransmitters Chemicals that stimulate neurons to fire.
53. _____Nerve cells transmitting information.
56. _____or-nothing principle Neuron either fires completely or not at all.
59. _____gravis Autoimmune disorder causing muscle weakness.