Physio Ex Exercise 4.1

Topics: Thyroid, Hormone, Thyroid-stimulating hormone Pages: 2 (356 words) Published: October 4, 2012
Exercise 4: Endocrine System Physiology: Activity 1: Metabolism and Thyroid Hormone Lab Report Pre-lab Quiz Results
You scored 100% by answering 6 out of 6 questions correctly. 1. Which of the following statements about metabolism is false? You correctly answered: d. All of the energy from metabolism is ultimately stored in the chemical bonds of ATP. 2. Thyroxine is

You correctly answered: c. the most important hormone for maintaining the metabolic rate and body temperature. 3. Thyroid-stimulating hormone (TSH) is
You correctly answered: b. produced in the pituitary gland.
4. An injection of TSH to an otherwise normal animal will cause which of the following? You correctly answered: d. goiter development
5. Thyrotropin-releasing hormone (TRH) is
You correctly answered: a. secreted by the hypothalamus.
6. Which of the following statements is true?
You correctly answered: b. The hypothalamus primarily secretes tropic hormones that stimulate the secretion of other hormones.

Post-lab Quiz Results
You scored 85% by answering 6 out of 7 questions correctly.
1. How would you treat a thyroidectomized animal so that it functions like a "normal" animal? You correctly answered: c. Provide the animal T4 supplements. 2. As a result of the missing hormone(s) in the hypophysectimized rat, what would be some expected symptoms? You correctly answered: d. decreased basal metabolic rate

3. An injection of thyroxine to an otherwise normal rat will cause which of the following? You correctly answered: b. hyperthyroidism
4. Why didn't any of the rats develop a goiter after thyroxine injection? You correctly answered: a. In all cases, TSH levels were not elevated by the thyroxine injection. 5. Why did the normal rat develop a palpable goiter with the TSH injection? Your answer: a. The TSH receptors in the hypothalamus were overstimulated. Correct answer: c. The TSH receptors on the thyroid gland were excessively stimulated. 6. An injection of propylthiouracil to an...
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