Multiple Choice QuestionsWhich one of the following hormones though synthesised elsewhere, is stored and released by the master gland?
Antidiuretic hormone
Luteinizing hormone
Prolactin
Prolactin
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
Hypothalamus activates the parasympathetic division of brain
Hypothalamus activates the parasympathetic division of brain
Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it(mostly the nucleus)
Insulin and glucagon
Thyroxin and insulin
Somartostatin and oxytocin
Somartostatin and oxytocin
What is correct to say about the hormone action in humans?
Glucagon is secreted by 
-cells of Islets of Langerhans and stimulates glycogenolysis
Secretion of thymosine is stimulated with ageing
In females, FSH first binds with specific receptors on ovarian cell membrane
In females, FSH first binds with specific receptors on ovarian cell membrane
Identify the hormone with its correct matching of source and function.
Oxytocin - posterior pituitary, growth and maintenance of mammary glands.
Melatonin - pineal gland, regulates the normal rhythm of sleep-wake cycle
Progesterone - corpus luteum, stimulation of growth and activities of female secondary sex organs
Progesterone - corpus luteum, stimulation of growth and activities of female secondary sex organs
Fight or flight reactions cause activation of
the parathyroid glands, leading to increased metabolic rate
the kidney, leading to suppression of reninangiotensin - aldosterone pathway
the adrenal medulla, leading to increased secretion epinephrine and norepinephrine
the adrenal medulla, leading to increased secretion epinephrine and norepinephrine
Which one of the following pairs of chemical substances, is correctly categorised?
Calcitonin and thymosin - Thyroid hormones
Pepsin and prolactin - Two digestive enzymes secreted in stomach
Troponin and myosin - Complex proteins in striated muscles
Troponin and myosin - Complex proteins in striated muscles
A chemical signal that has both endocrine and neural roles is?
melatonin
calcitionin
epinephrine
epinephrine
C.
epinephrine
Epinephrine secreted from the medulla of adrenal gland acts as both, an endocrine hormone and as a neurotransmitter (produced at the ends of sympathetic never fibres).
Epinephrine as hormone accelerates metabolic rate for preparing us to face emergency situations.
As neurotransmitter, it transmits nerve impulse across a synaptic left. Calcitonin is released when Ca2+ level increases, melatonin causes concentration of pigment in melanocytes and cortisol is a glucocorticoid.
Match the source gland with its respective hormone as well as the function.
| Source gland | Hormone | Function |
| Posterior pituitary | Vasopressin | Stimulates resorption of water in the distal tubules in the nephron |
| Source gland | Hormone | Function |
| Corpus luteum | Oestrogen | Supports pregnancy |
| Source gland | Hormone | Function |
| Thyroid | Thyroxine | Regulates blood calcium level |
| Source gland | Hormone | Function |
| Thyroid | Thyroxine | Regulates blood calcium level |
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