Control and Coordination Crossword

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Across
  1. 4. A muscle or gland that responds to the stimulus.
  2. 5. A chemical messenger secreted by endocrine glands that regulate body functions.
  3. 7. A junction between two neurons where nerve impulses are transmitted chemically.
  4. 9. Growth of plant parts in response to chemicals (e.g., pollen tube towards ovule).
  5. 11. A specialized cell or organ that detects stimuli (e.g., skin, eyes, ears).
  6. 12. Any change in the environment that causes a response in an organism.
  7. 14. A quick, automatic response to a stimulus, controlled by the spinal cord.
  8. 15. Directional growth movement in plants in response to stimuli.
  9. 16. Central Nervous System Consists of the brain and spinal cord; controls most functions of the body.
Down
  1. 1. Glands that secrete hormones directly into the bloodstream (e.g., thyroid, adrenal).
  2. 2. A plant hormone that promotes cell division and delays aging.
  3. 3. Growth of plant parts in response to gravity.
  4. 6. Peripheral Nervous System Composed of nerves outside the CNS; connects the CNS to the body.
  5. 8. Growth of a plant towards light.
  6. 10. A plant hormone that promotes cell elongation and growth.
  7. 13. A nerve cell that transmits electrical impulses in the nervous system.