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Answer the questions after observing the diagram given below. What acts as the first messenger? Why can’t hormones like catecholamines enter their target cells through plasma membrane? Name the mode - Biology

Answer in Brief

Answer the questions after observing the diagram given below.

  1. What acts as the first messenger?
  2. Why can’t hormones like catecholamines enter their target cells through plasma membrane?
  3. Name the mode of hormone action shown in the diagram.
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Solution

  1. The hormone acts as the first messenger
  2. Hormones like catecholamines are not lipid soluble and hence they cannot enter their target cells through the plasma membrane.
  3. Mode of hormone action through membrane receptor.
Concept: Adrenal Gland/Suprarenal Gland
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