Prepare for NEET Biology Chemical Coordination and Integration (Hypothalamus) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help to understand neurosecretory cells and releasing/inhibiting hormones.
NEET Questions / Zoology / Chemical Coordination and Integration / Hypothalamus
A patient presents with persistent polyuria and polydipsia. Damage to which specific hypothalamic nuclei is MOST likely responsible for these symptoms, given that anterior pituitary function remains normal?
Preoptic nucleus
Supraoptic and paraventricular nuclei
Ventromedial nucleus
Arcuate nucleus
A researcher observes that a lesion in a rat's hypothalamus leads to poikilothermia (inability to regulate body temperature). Which area of the hypothalamus is MOST likely affected?
Lateral hypothalamic area
Preoptic area
Suprachiasmatic nucleus
Mammillary bodies
Which hypothalamic hormone stimulates the release of both FSH and LH from the anterior pituitary?
TRH
CRH
GnRH
GHIH
Lesions in which hypothalamic area would MOST likely result in uncontrolled rage and aggression in an animal model?
Lateral Hypothalamus (LH)
Ventromedial Hypothalamus (VMH)
Anterior Hypothalamus (AH)
Posterior Hypothalamus (PH)
A patient exhibits adipsia (lack of thirst) despite severe dehydration. Which hypothalamic nucleus is MOST likely dysfunctional?
Paraventricular nucleus
Lateral hypothalamus
Supraoptic nucleus
Arcuate nucleus
Damage to the infundibulum would MOST directly affect the release of which of the following hormones?
PRH and PIH
Oxytocin and ADH
TRH and CRH
GHRH and GHIH
Which hormone, primarily synthesized in the hypothalamus, is responsible for stimulating uterine contractions during childbirth and milk ejection reflex?
Oxytocin
Prolactin
Vasopressin
Gonadotropin-releasing hormone
Damage to which area of the hypothalamus is most likely to result in uncontrolled body temperature fluctuations?
Lateral hypothalamus
Ventromedial hypothalamus
Preoptic area
Suprachiasmatic nucleus
The hypothalamus regulates the anterior pituitary gland through the release of:
Direct neural connections
Neurohormones into the hypophyseal portal system
Hormones into the general circulation
Neurotransmitters across synaptic clefts
Which hypothalamic hormone inhibits the release of prolactin from the anterior pituitary?
Somatostatin
Dopamine
Gonadotropin-releasing hormone (GnRH)
Thyrotropin-releasing hormone (TRH)