My Notes
Hypersecretion of growth hormone in adults does not cause further increase in height because
1. growth hormone becomes inactive in adults
2. epiphyseal plates close after adolescence
3. bones loose their sensitivity to growth hormone in adults
4. muscle fibres do not grow in size after birth
Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.
|
Gland |
Secretion |
Effect on body |
|
A
Alpha cells of islets of Langerhans Anterior pituitary |
Oestrogen
B
|
Maintenance of secondary sexual characters Raises blood sugar level |
Options :
A B C
1. Placenta Insulin Vasopressin
2. Ovary Insulin Calcitonin
3. Placenta Glucagon Calcitonin
4. Ovary Glucagon Growth hormone
Assertion : Failure of secretion of somatotropin from an early age causes dwarfism in the patient.
Reason : Somatotropin hormone stimulates the body growth and elongation of long bones.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Excess secretion of GH in middle age results in severe disfigurement of face is known as
(1) Gigantism
(2) Acromegaly
(3) Addison disease
(4) Grave’s disease
Which of the following is caused because of the excess secretion of the GH?
(1) Gigantism
(2) Acromegaly
(3) Dwarfism
(4) Both 1 and 2
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