Match the source gland with its respective hormone as well as the function.
Source gland |
Hormone | Function | |
(a) | Posterior pituitary |
Vasopressin | Stimulates reabsorption of water in the distal tubules in the nephron |
(b) | Corpus luteum |
Prolactin | Supports pregnancy |
(c) | Thyroid | Thyroxine | Regulates blood calcium level |
(d) | Anterior pituitary |
Oxytocin | Contraction of uterus muscles during childbirth |
1. (a)
2. (b)
3. (c)
4. (d)
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 | Oestrogen | Maintenance of secondary sexual characters |
Alpha cells of islets of Langerhans | B | Raises blood sugar level |
Anterior pituitary | C | Oversecretion leads to gigantism |
Options: | A | B | C |
1. | Placenta | Insulin | Vasopressin |
2. | Ovary | Insulin | Calcium |
3. | Placenta | Glucagon | Calcitonin |
4. | Ovary | Glucagon | Growth hormone |
Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
1. Aldosterone
2. Both androstenedione and dehydroepiandrosterone
3. Adrenalin
4. Cortisol
Which one of the following pairs is incorrectly matched?
1. Glucagon- Beta cells(source)
2. Somatostatin- Delta cells(source)
3. Corpus luteum- Relaxin(secretion)
4. Insulin- Diabetes mellitus(disease)
Toxic agents present in food which interfere with thyroxin synthesis lead to the development of:
1. toxic goitre
2. cretinism
3. simple goitre
4. thyrotoxicosis
A health disorder that results from the deficiency of thyroxin in adults and characterized by-
(i) a low metabolic rate
(ii) increase in body weight
(iii) tendency to retain water in tissues is:
1. hypothyroidism
2. simple goitre
3. myxoedema
4. cretinism
1. parathormone
2. thyroxine
3. calcitonin
4. Both 1 and 3
1. Parathyroid and adrenal
2. Pancreas and parathyroid
3. Thymus and testes
4. Adrenal and ovary
Which one of the following is an example of a negative feedback loop in humans?
1. | Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold |
2. | Secretion of tears after falling of sand particles into the eye |
3. | Salivation of the mouth at the sight of delicious food |
4. | secretion of sweat glands and constriction of the skin blood vessels when it is too hot |