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Standard XII
Zoology
Question

Function of thyroxin is
  1. Controls sperm production
  2. Contracts the smooth muscles
  3. Controls egg production
  4. Controls general metabolism and growth in body

A
Contracts the smooth muscles
B
Controls egg production
C
Controls sperm production
D
Controls general metabolism and growth in body
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Solution
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Thyroxine is a hormone the thyroid gland secretes into the bloodstream. ... Thyroxine plays a crucial role in heart and digestive function, metabolism, brain development, bone health, and muscle control. It affects almost all of the body's systems, which means proper thyroxine levels are vital for health.
So, the correct answer is 'Controls general metabolism and growth in body'.

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Similar Questions
Q1
Match the following:

COLUMN I

COLUMN II
i
Insulin
A
Controls Sperm production
ii
Prolactin
B
Contracts the smooth muscles
iii
Thyroxin
C
Controls blood glucose levels
iv
Estrogen
D
Controls general metabolism and growth in body
v
Oxytocin
E
Stimulates the development of the mammary glands
vi
Testosterone
F
Controls Egg production
Find the appropriate match for column I from Column II
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Q2
Match the hormones given in column I with their functions given in column II :
Hormones Functions
(i) Thyroxine (a) Causes breasts to develop in females
(ii) Adrenaline (b) Causes the male to start producing sperms
(iii) Insulin (c) Prepares the body for an emergency
(iv) Estrogen (d) Controls the metabolic rate
(v) Testosterone (e) Regulates the amount of sugar in blood
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Q3

Assertion(A): Iodine diet is essential for proper body functioning in man.

Reason(R): Iodine helps in the formation of thyroxin which regulates overall metabolism of the body.


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Q4

Question 26
Which statement is not true about thyroxin?

(a) Iron is essential for the synthesis of thyroxin
(b) It regulates carbohydrate, protein and fat metabolism in the body
(c) Thyroid gland requires iodine to synthesise thyroxin
(d) Thyroxin is also called thyroid hormone


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Q5
The hormone which controls the rate of body metabolism is
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