Physio Lab 4 Quiz and answers already passed 2025

Physio Lab 4 Quiz and answers already
passed 2025
Which of the following is INCORRECTLY matched with its secreting organ?
-TRH: hypothalamus
-Triiodothyronine: thyroid gland
-Thyroxine: thyroid gland
-TSH: posterior pituitary - correct answer TSH-Posterior pituitary


A decrease in the level of thyroxine would increase the secretion of __
-TRH
-TSH
-Neither TSH nor TRH
-Both TSH and TRH - correct answer Both TSH and TRH


A hypophysectomized rat is missing its __
-Adrenal gland
-Pituitary gland
-Thryoid gland
-Hypothalamus - correct answer Pituitary gland


Thyroxine is a __
-Slow-acting hormone that works through a second-messenger system
-Hormone that enters the nucleus
-Slow-acting hormone that enters the nucleus
-Slow-acting hormone

, -Hormone that works through a second-messenger system - correct answer
Slow-acting hormone that enters the nucleus


Which of the following hormones is regulated by a positive feedback
mechanism?
-Thyroxine
-TRH
-TSH
-Oxytocin - correct answer Oxytocin


An abnormally high level of which of the following will result in goiter?
-TRH
-TSH
-Thyroxine
-Either TRH or TSH
-Either thyroxine or TRH - correct answer TSH


Why did the TSH have no effect on the BMR on the thyroidectomized rat?
-The metabolism of the rat is already too low
-The rat is missing its pituitary gland
-The metabolism of the rat is already to high
-The rat is missing its thyroid gland - correct answer The rat is missing its
thyroid gland


The injection of TSH resulted in goiter in
-The thyroidectomized rat
-The normal rat