Across
- 2. 1/d2, If distance is doubled, light intensity decreases by 1 forth (2 words)
- 3. The diffusion of water through a partially permeable membrane to a high concentration of solute.
- 6. Movement of substances against a concentration gradient using energy (2 words).
- 9. Blood vessels that carry blood away from the heart.
- 10. Liquid part of blood that carries nutrients and hormones.
- 12. Loss of water vapour from plant leaves through stomata.
- 13. Blood cells that carry oxygen using haemoglobin.
- 14. Protein in red blood cells that binds oxygen.
- 16. Plant tissue that transports sugars made in photosynthesis.
- 17. Plant tissue that carries water and minerals from roots to leaves.
- 18. Tiny pores in leaves that allow gas exchange.
- 20. Cells that control the opening and closing of stomata.
- 21. Gap between two neurones
- 22. Blood vessels that carry blood back to the heart.
- 23. Key ion used in chloroplasts
- 25. Self-correcting system in the body, allowing animals to maintain homeostasis (2 words).
- 26. Hormone responsible for regulating metabolic rate
Down
- 1. Small blood vessels where exchange of substances occurs.
- 4. Neurone found only in reflex actions
- 5. Blood cells that fight infections and produce antibodies.
- 7. chemical diffused across a synapse
- 8. Found in the right atrium, responsible for maintaining regular heart rhythm
- 10. Fragments that help blood clot.
- 11. Released from the adrenal glands, responsible for our fight or flight response
- 15. Ion combined with glucose to form amino acids in a plant
- 19. Movement of sugars around the plant
- 24. Master gland