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I. Maximum iodine is stored in thyroid ...

I. Maximum iodine is stored in thyroid gland
II. Calcitonin is non-iodinised hormone secreted by parafollicular cells of thyroid gland
III. Calcitonin (TCT) regulates the blood `Ca^(+2)` level
IV. TCT is hypocalcemic factor

A

All are correct

B

All are wrong

C

Only, I, and III are correct

D

Only IV is correct

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correctness of the statements regarding the thyroid gland and its hormones, let's analyze each statement step by step. ### Step-by-Step Solution: **Statement I: Maximum iodine is stored in the thyroid gland.** - The thyroid gland is known for its ability to absorb and store iodine, which is essential for the synthesis of thyroid hormones, particularly thyroxine (T4). Therefore, this statement is **correct**. **Statement II: Calcitonin is a non-iodinised hormone secreted by parafollicular cells of the thyroid gland.** - Calcitonin, also known as thyroid calcitonin (TCT), is indeed secreted by the parafollicular cells (also called C cells) of the thyroid gland. Unlike thyroid hormones like thyroxine, calcitonin does not contain iodine. Thus, this statement is also **correct**. **Statement III: Calcitonin (TCT) regulates the blood Ca²⁺ level.** - Calcitonin plays a crucial role in regulating calcium levels in the blood. It lowers blood calcium levels by inhibiting osteoclast activity in bones and promoting calcium excretion in the kidneys. Therefore, this statement is **correct**. **Statement IV: TCT is a hypocalcemic factor.** - Since calcitonin decreases the concentration of calcium in the blood, it is indeed classified as a hypocalcemic factor. This means it helps to lower blood calcium levels, making this statement **correct** as well. ### Conclusion: All four statements are correct. Therefore, the final answer is that **all statements are correct**.
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Consider the following statements : 1. Iodine is necessary for the thyroid gland to make adrenaline. 2. lodine deficiency leads to goiter in human beings. 3. Iodine is secreted by pancreas and helps in regulating cholesterol level. Which of the statements given above is/are correct?

Answer question numbers 3(a) to 3(d) on the basis of your understanding of the following information and related studied concepts. Thyroid gland is a bilobed structure situated in our neck region. It secretes a hormone called thyroxine. Iodine is necessary for the thyroid gland to make thyroxine. Thyroxine regulates carbohydrate, protein and fat metabolism in the body. It promotes growth of body tissues also. When there is an excess of thyroxine in the body, a person suffers from hyperthyroidism and if this gland is underactive it results in hypothyroidism. Hyperthyroidism is diagnosed by blood tests that measure the levels of thyroxine and Thyroid Stimulating Hormone (TSH). Hypothyroidism is caused due to the deficiency of iodine in our diet resulting in a disease called goitre. Iodised salt can be included in our diet to control it. Where is thyroid gland situated in our body ?

Knowledge Check

  • Non iodinised hormone secreted by thyroid gland is :

    A
    `T_(3)`
    B
    `T_(4)`
    C
    Calcitonin
    D
    Oxytocin

  • Assertion : Collip's hormone is secreted by the chief cells of parathyroid gland. Reason : It regulates calcium and phosphate level between blood and tissues.

    A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
    B
    If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion
    C
    If Assertion is true, but Reason is false
    D
    If Assertion is false, but Reason is true

  • Read the following statements about the parathyroid gland and identify the true and false ones. Select the correct option after referring to the given table. I. Human beings have a pair of parathyroid glands, situated in each lobe of the thyroid gland. II. The secretion of PTH is regulated by the levels of circulating calcium ions. III. PTH is a hypocalcemic hormone. PTH plays a major role in maintaining calcium balance in the body along with TCT.

    A
    I - True, II - False, III - True, IV - False
    B
    I - True, II - True, III - False, IV - True
    C
    I - False, II - False, III - True, IV - False
    D
    I - False, II - True, III - False, IV -True

    • Similar Questions

    Explore conceptually related problems

    Answer question numbers 3(a) to 3(d) on the basis of your understanding of the following information and related studied concepts. Thyroid gland is a bilobed structure situated in our neck region. It secretes a hormone called thyroxine. Iodine is necessary for the thyroid gland to make thyroxine. Thyroxine regulates carbohydrate, protein and fat metabolism in the body. It promotes growth of body tissues also. When there is an excess of thyroxine in the body, a person suffers from hyperthyroidism and if this gland is underactive it results in hypothyroidism. Hyperthyroidism is diagnosed by blood tests that measure the levels of thyroxine and Thyroid Stimulating Hormone (TSH). Hypothyroidism is caused due to the deficiency of iodine in our diet resulting in a disease called goitre. Iodised salt can be included in our diet to control it. State the function of thyroxine in human body.

    How many statements are correct regarding parathyroid gland? (a) Four parathyroid gland present on front side of thyroid gland (b) It secretes parathromone which is steroidal in nature (c) It increase blood Ca^(++) level (d) It act on bone and stimlate bone resorbtion

    Functions of thyroid hormone are I. fat and protein metabolism. II. maintains the IQ and BMR III.maintain blood calcium levels. IV. thermoregulation. Choose the correct option.

    How many of the given statements are true? 1. Pars nervosa stores and releases two hormones called oxytocin and vasopressin. II. Melatonin influences the menstrual cycle. III. Calcitonin stimulates reabsorption of Ca^(2+) by the renal tubules. IV. After ovulation, the ruptured follicle is converted to macula lutea.

    Choose the statement which correctly indicates the functioning of thyroid hormone I regulations of the basal metabolic rate. II support the process of RBC formation III Regulation the blood calcium levels IV Maintenance of water and electrolyte balance. The correct option is

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