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A-Level Biology OCR A

Animal Hormones Plant Organic Mass Flow Cell Specific

Animal hormones are complex and move via blood vessels, while plant hormones are simpler and transported through xylem, phloem, diffusion, or cell-to-cell. Both are slow-acting, have specific shapes that bind to target cell receptors, and are produced in specific tissues (endocrine glands for animals, meristems for plants).

Les hormones animales sont complexes et circulent dans le sang via les vaisseaux, tandis que les hormones végétales sont plus simples et transportées par xylem, phloem, diffusion ou de cellule à cellule. Les deux sont lentes, ont des formes spécifiques agissant sur des récepteurs cibles, et sont produites dans des tissus spécifiques (glandes endocrines pour les animaux, méristèmes pour les plantes).

Front Compare plant and animal hormones.
Back Animal vs plant hormones:
  • Animal hormones are complex organic substances, plant hormones are simple organic substances
  • Animal hormones move by mass flow through the blood vessels, plant hormones are actively transported/diffuse/move by mass flow through xylem & phloem or cell to cell 
  • Both are slow acting
  • Both have specific shape that acts on specific target cell receptors
  • Animal hormones are produced in endocrine glands, for plants this is often meristem tissue

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