Which gland stores hormone in intercellular space before its secretion into blood :-a)Pancreasb)Thyroidc)Testisd)OvaryCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The Thyroid gland is the only endocrine gland that stores its secretory product in large quantities, normally about 10 days supplies in the extracellular space before discharging into the blood. It secretes iodinated hormone i.e., thyroxine and triiodothyronine that are stored in the colloid which fills the follicle cells and released to blood when needed.

Answer

Thyroid gland secretes thyroxine. thyroxine hormones are stored in the humen of the follicle the extracellular spaces before discharging into blood. thyroid gland is situated between trachea and larynx in the neck and secrets thyroxine hormone

Answer

Thyroid gland secretes thyroxine. Thyroxine hormones are stored in the lumen of the follicle the extracellular spaces before discharging into blood . Thyroid gland is situated between trachea and larynx in the neck and secrets thyroxine hormone which increases oxygen consumption by metabolically active tissues.
So option ' B ' is correct answer.

Answer

Thyroid gland secretes thyroxine. Thyroxine hormones are stored in the lumen of the follicle, the extracellular space.

Answer

Thyroid gland secret thyroxin harmone in which Iodine is present in majority. A lack of iodine (required to make functional T3 and T4) causes a colloidal, or endemic, goiter.

Answer

The correct answer is option 'B) Thyroid'.

The thyroid gland is responsible for the production, storage, and release of several important hormones, including thyroxine (T4) and triiodothyronine (T3). These hormones play a crucial role in regulating various processes in the body, such as metabolism, growth, and development.

The thyroid gland consists of two lobes located on either side of the trachea, just below the larynx. It is a highly vascular gland, receiving a rich blood supply. The gland is made up of many follicles, which are small spherical structures filled with a viscous fluid called colloid. The colloid contains a large amount of thyroid hormone precursors, mainly thyroglobulin.

Now, let's understand how hormone storage occurs in the thyroid gland:

1. Follicular cells: The follicular cells that surround the follicles are responsible for the synthesis and secretion of thyroid hormones. These cells actively take up iodine from the blood and combine it with the amino acid tyrosine to form thyroglobulin. The thyroglobulin is then stored in the colloid within the follicles.

2. Hormone synthesis: Inside the colloid, the thyroglobulin undergoes a process called iodination, where iodine is added to the tyrosine residues. This process forms iodinated thyroglobulin, which contains the thyroid hormones T3 and T4. These hormones are bound to the thyroglobulin molecule until they are needed.

3. Hormone release: When the body requires thyroid hormones, a signal is sent from the pituitary gland to the thyroid gland via the thyroid-stimulating hormone (TSH). TSH binds to receptors on the follicular cells and triggers the release of the stored thyroglobulin from the colloid.

4. Endocytosis and secretion: The follicular cells engulf the thyroglobulin through a process called endocytosis. The thyroglobulin-containing vesicles then fuse with lysosomes, which contain enzymes that break down the thyroglobulin. This process releases the free T3 and T4 hormones into the bloodstream, where they can exert their effects on target tissues throughout the body.

In conclusion, the thyroid gland stores hormone in the intercellular space within the colloid of the follicles. This stored hormone is released into the bloodstream when stimulated by the thyroid-stimulating hormone.

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