Respuesta :
Complete question: A hydrophilic peptide hormone is produced in the anterior pituitary gland located at the base of the brain. The hormone targets specific cells in many parts of the body.
Which of the following best explains a possible mechanism that would enable the hormone to efficiently reach all of the target cells in the body? answer choices
A. The hormone interacts with the nerves at the base of the brain and directs signals to the target cells through the nervous system.
B. The hormone diffuses into target cells adjacent to the anterior pituitary gland, where the hormone is degraded.
C. The hormone is released into the bloodstream where it can be transported to all cells with the correct receptors.
D. The hormone moves through cytoplasmic connections between cells until it has reached all cells with the correct intracellular binding sites.
Answer: (C) The hormone is released into the bloodstream where it can be transported to all cells with the correct receptors.
Explanation: Hydrophilic peptide hormone is secreted in the anterior pituitary gland, which is in a form of chemical signals or ions. These signals are secreted into the bloodstream (duct) and are passed through the blood to get to a target organ, which possess cells signalling the appropriate receptor that binds to the chemical messenger (ligand), then signal transduction is established.
The hormone possessing the carbohydrate in the chain like FSH are all hydrophilic and are not able to traverse the plasma membrane of the compartments. Hydrophilic hormones are water-soluble like ADH, glucagon etc.
The correct answer is:
Option C. The hormone is released into the bloodstream where it can be transported to all cells with the correct receptors.
This can be explained as:
- They are perspired by the pituitary gland in the form of chemical signals.
- They are then discharged into the bloodstream and from the blood, it advances towards the target organ.
- The target organs have distinctive receptors for the binding of the hormone and via cell signalling, the ligand attaches to the hormone and transduction of signalling happens.
Therefore, hormones are released into the blood from where it reaches their receptors.
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