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NEET Questions / Zoology / Chemical Coordination and Integration
A rare genetic disorder affects the synthesis of a specific enzyme crucial for converting T4 to T3. Which of the following would be the MOST likely clinical presentation in a patient with this disorder?
Elevated TSH and T3 levels
Decreased TSH and T3 levels
Elevated TSH levels and decreased T3 levels
Decreased TSH and elevated T3 levels
Which of the following combinations of hormones are primarily responsible for the growth spurt observed during puberty?
Growth hormone and insulin
Thyroid hormones and glucocorticoids
Growth hormone, thyroid hormones, and sex steroids
Glucocorticoids and sex steroids
A patient presents with weight loss, heat intolerance, and increased heart rate. Blood tests reveal elevated T3 and T4 levels, but TSH levels are low. A radioactive iodine uptake test shows diffuse uptake. Which of the following is the MOST likely diagnosis, considering the specific combination of these findings?
Hashimoto's thyroiditis
Toxic multinodular goiter
Graves' disease
Thyroid adenoma
Which of the following hormones is primarily responsible for regulating the basal metabolic rate (BMR)?
Growth hormone
Insulin
Thyroid hormone
Cortisol
The release of thyroid hormones is primarily regulated by:
ACTH from the anterior pituitary
TSH from the anterior pituitary
GH from the anterior pituitary
ADH from the posterior pituitary
Which of the following is LEAST directly influenced by thyroid hormones?
Maintenance of water and electrolyte balance
Regulation of basal metabolic rate
Normal rhythm of sleep-wake cycle
Development of immune system
Thyroid hormones are crucial for various bodily functions. Which of the following is NOT a primary function of these hormones?
Regulation of basal metabolic rate
Maintenance of water and electrolyte balance
Development of the immune system
Support the process of RBCs formation
A patient presents with symptoms suggesting a thyroid disorder. Which of the following symptoms is LEAST likely to be directly related to thyroid hormone imbalance?
Changes in weight
Sleep difficulties
Fatigue
Frequent infections
Which of the following processes is NOT primarily regulated by thyroid hormones?
Regulation of basal metabolic rate (BMR)
Maintenance of body temperature
Differentiation of T lymphocytes
Stimulation of erythropoiesis
A deficiency in thyroid hormones can lead to various health issues. Which of the following is LEAST likely to be a direct consequence of hypothyroidism?
Weight gain
Fatigue
Sleep disturbances
Impaired antibody production
