Tag: zoology
Questions Related to zoology
When a young child's body temperature drops, hypothalamus produces _____________ hormone.
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GH
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TSH
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TRH
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Both A and B
- The hypothalamus is the basal part of the diencephalon, forebrain.
- When a young child's body temperature drops, the hypothalamus produces TRH( thyrotropin-releasing hormone)hormone.
- Thyroid-releasing hormone (TRH) from the hypothalamus stimulates TSH(Thyroid stimulating hormone) from the pituitary, which stimulates thyroid hormone release from the thyroid gland.
- Thyroid hormone causes an increase in BMR(Basal metabolic cate) and increases in BMR results in an increase in body temperature to normal.
- Hence When a young child's body temperature drops, the hypothalamus produces TRH( thyrotropin-releasing hormone)hormone.
- So, the correct answer is 'TRH'.
Gonadotropin releasing hormone is transferred to anterior pituitary by
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left coronary artery
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hypophysial portal artery
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axons of neurosecretory cells
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nuclei of hypothalamus
Gonadotropin-releasing hormone is a hormone responsible for releasing FSH and LH from anterior pituitary gland. It is transferred to the anterior pituitary gland by the hypophysial portal artery.
Gonadotropin releasing hormone is formed by
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Adenohypophysis
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Pars intermedia
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Neurohypophysis
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Hypothalamus
Thermostat is an instrument by which one can regulate the temperature of an oven, a heater or a refrigerator. Functionally a similar mechanism is located in the mammalian brain in the region of the
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Cerebrum
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Hypothalamus
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Cerebellum
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Medulla oblongata
Hypothalamus maintains the constant human body temperature by regulation of the diameter of blood vessels (constriction or dilation), shivering and sweating mechanisms. Option B is correct. Cerebrum serves to receive sensory inputs, to bring about integration before commanding voluntary motor responses, to coordinate the activities of other part of brain, and to carry out higher thought processes for learning, memory, language and speech. This makes option A incorrect. Cerebellum serves to coordinate the voluntary movements of skeletal muscles as well as posture, balance and equilibrium. Option C is incorrect. Medulla oblongata consists of reflex centres that control heartbeat, blood vessel diameter and rhythm of breathing as well as other vital functions. Option D is incorrect. Correct answer is B.
Hormones of hypothalamus are known as
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Regulatory hormones
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Growth hormones
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Trophic hormones
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Angiotensin
Thermoregulatory centre of the human body is
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Pituitary
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Skin
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Hypothalamus
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Thyroid
a) Hypothalamus maintains the constant human body temperature by regulation of the diameter of blood vessels (constriction to conserve heat during body temperature lower than normal or dilation to lose heat by increasing blood flow during body temperature higher than the normal range), shivering and sweating mechanisms.
The thermoregulatory centre in higher animals is found in
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Pituitary
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Medulla
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Thalamus
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Hypothalamus
Diencephalon consists of thalamus and hypothalamus. Thalamus serves as relay station for sensory impulses as well as integration centre for recognition of pain, temperature and hard touch. The thermostat centre for temperature control is present in hypothalamus. Hypothalamus maintains the constant human body temperature by regulation of the diameter of blood vessels (constriction or dilation), shivering and sweating mechanisms.
Specific part of hypothalamus, responsible for physiological sweat secretion is
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Supra-optic nucleus
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Para ventriculus nucleus
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Pars distalis
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Median eminence
The primary target of the hormones of hypothalamus is
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Pineal gland
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Thymus
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Pituitary
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Testis
The releasing hormones are produced by
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Testis
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Pancreas
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Pituitary
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Hypothalamus