Rhythms of sleep in our body are controlled by:
Thymus gland
Pineal gland
ACTH
ADH
(2)
The pineal gland is a tiny gland located in the brain. Melatonin, a hormone that helps regulate sleep and wakefulness, is produced by this gland.
Which statement is not true about thyroxine?
Thyroxine regulates the basal metabolism of our body.
Iodine is an important component required for synthesis of thyroxine.
Under secretion of thyroxine causes simple goitre.
Iron is essential for synthesis of thyroxine.
(4)
Iodine, not iron, is required for the synthesis of thyroxine. It controls the glucose, protein, and fat metabolism of the body. The thyroid gland produces thyroxine, which is also known as thyroid hormone.
Sapna suffers from a condition due to which her average blood sugar level is 174 mg/dL. The average blood sugar level in a healthy adult is <140 mg/dL.
insufficient production of thyroxine in her body.
insufficient production of insulin in her body
excess production of thyroxine in her body.
excess production of insulin in her body.
(2)
Lack of insulin production is primarily the cause of type 1 diabetes. It occurs when insulin-producing cells are damaged or destroyed and stop producing insulin. Insulin is needed to move blood sugar into cells throughout the body. Thus the levels of the blood sugar increase drastically.
Dramatic changes of body features associated with puberty are mainly because of secretion of:
Estrogen from testes and testosterone from ovary
Estrogen from adrenal gland and testosterone from pituitary gland
Testosterone from testes and estrogen from ovary
Testosterone from thyroid gland and estrogen from pituitary gland
(3)
The release of oestrogen and testosterone is associated to puberty changes. In females, oestrogen is secreted from the ovary, while testosterone is secreted from the testes in males.
CNS consists of:
brain
spinal cord
only cerebrum
both (a) and (b)
(4)
The central nervous system consists of the brain and spinal cord. The spinal cord is a long, tubular bundle of neurons that connects the brain to the rest of the body and transmits information.
Olfactory reception is related to sense of:
smelling
tasting
vision
none of these
(1)
The olfactory neurons have olfactory receptors on their surfaces. Their primary function is to detect odours.
Which of the following endocrine glands is unpaired?
Adrenal
Pituitary
Testes
Ovary
(2)
The pituitary gland, also known as the hypophysis, is a pea-sized endocrine gland. It is a protrusion at the base of the brain, at the bottom of the hypothalamus. It is a gland which is not paired. Adrenal, ovary and testes are paired glands.
Receptor for stimulus are present in:
stomach
response
sense organs
hot objects
(3)
Receptor cells, which are specialised cells that produce electrical impulses in response to certain stimuli, are found in the sense organs.
When a person is suffering from severe cold, he or she can not:
differentiate the taste of an apple from that of an ice-cream
differentiate the smell of a perfume from that of an agarbatti.
differentiate red light from green light.
differentiate a hot object from a cold object.
(2)
Mucus in the nasal passages thickens during a cold, preventing scent molecules from reaching the olfactory receptor cells. As a result, the brain receives no information identifying the odour, making it impossible to distinguish the smell of a perfume from that of an agarbatti.
The structural and functional unit of nervous system is:
Nephron
Neuron
Cyton
Axon
(2)
Neurons are the structural and functional unit of nervous system. They generate electrical signals called action potentials that allow them to quickly send information over large distances.
