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Place in the correct order the action ...

Place in the correct order the action of water soluble hormones e.g. FSH
I. Physioiogical response e.g. ovarian growth
II. Biochemical response
III. Generation of second messenger
IV. Response I
V. Hormone binds to plasma membrane bind

A

`I to II to III to IV to V`

B

`V to IV to III to II to I`

C

`V to IV to II to III to I`

D

`I to II to V to III to IV`

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct order of the action of water-soluble hormones like FSH (Follicle Stimulating Hormone), we need to analyze the sequence of events that occur when such hormones interact with their target cells. Here’s the step-by-step solution: ### Step-by-Step Solution: 1. **Hormone Binds to Plasma Membrane (V)**: - The first step in the action of water-soluble hormones is the binding of the hormone (in this case, FSH) to the receptor located on the plasma membrane of the target cell. 2. **Response I (IV)**: - Following the binding of the hormone to the receptor, an initial response is generated within the cell. This response is often a signal transduction event that prepares the cell for further action. 3. **Generation of Second Messenger (III)**: - Since FSH is a water-soluble hormone, it cannot cross the plasma membrane. Therefore, the binding of FSH to its receptor triggers the generation of a second messenger inside the cell. Common second messengers include cyclic AMP (cAMP) and inositol triphosphate (IP3). 4. **Biochemical Response (II)**: - The second messenger then initiates a biochemical response within the cell. This can involve various cellular processes such as enzyme activation, ion channel opening, or other metabolic changes. 5. **Physiological Response (I)**: - Finally, the biochemical changes lead to a physiological response, such as ovarian growth in the case of FSH. This is the ultimate effect of the hormone on the target tissue. ### Correct Order: The correct order of the actions of water-soluble hormones like FSH is: - V (Hormone binds to plasma membrane) - IV (Response I) - III (Generation of second messenger) - II (Biochemical response) - I (Physiological response) Thus, the correct sequence is: **V → IV → III → II → I**.
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