NEET Zoology MCQs

Which organ system is responsible for the production and secretion of hormones that regulate various bodily functions?

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?

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?

Which hypothalamic hormone stimulates the release of both FSH and LH from the anterior pituitary?

Damage to the infundibulum would MOST directly affect the release of which of the following hormones?

A patient presents with disrupted sleep-wake cycles, depressed mood, and abnormal thermoregulation. Damage to which specific region of the epithalamus is MOST likely responsible for these symptoms?

Pinealocyte tumors can disrupt melatonin secretion. Which hormonal imbalance is MOST likely to be observed in a patient with an overactive pineal tumor?

A patient presents with steatorrhea, hyperglycemia, and abdominal pain. Further investigation reveals significantly decreased levels of both insulin and pancreatic enzymes. Which of the following is the MOST likely underlying cause of this condition?

Which specific pancreatic cell type is MOST directly responsible for the production and secretion of somatostatin?

Zollinger-Ellison syndrome is characterized by excessive secretion of gastrin, leading to hyperacidity in the stomach and duodenum. While gastrinomas (gastrin-secreting tumors) are typically found in the duodenum or pancreas, which specific pancreatic cell type would be implicated if the gastrinoma originated within the pancreas?