Physiology Interactive Lab Simulations 4.0 LESSON 19 Endocrine Function Thyroid
ID: 3473881 • Letter: P
Question
Physiology Interactive Lab Simulations 4.0 LESSON 19 Endocrine Function Thyroid Gland and Metabolic Rate endocrine system maintains homeostasis by secreting State your hypothesis regarding the relationship between that affect the actions of cells around the thyroxine secretion from the thyroid gland and metabolic rate reactions are a prime target of endocrine hormones, as demonstrated by the actions of thyroxine, the active hormone produced by the thyroid gland. Thyroxine increases metabolic activity in nearly all the cells of the body. When body temperature decreases, thyroxine secretion increases. The increase in metabolic rate can be inferred from oxygen consumption. In this simulation, you will measure the rate of oxygen consumption, over a range of temperatures, of a normal mouse and a mouse that has been given propylthiouracil (PTU) to reduce thyroid 2. Read the objectives and introduction and take the pre- gland function. You will create a graph that will clearly depict the effect of temperature on metabolic rate as controlled by 3. After completing the pre-laboratory quiz, read through 1. Open Lesson 19 in Ph.IL.S.. Endocrine Function Thyroid Gland and Metabolic Rate (fig. 39.13). laboratory quiz. the wet lab. the presence or absence of thyroxine secretion Before 4. The laboratory exercise will open when you click 5. Print a copy of the final graph you recorded from the 6. Follow the instructions provided in the laboratory concepts (use your textbook as a reference CONTINUE after completing the wet lab. virtual computer screen (fig. 39.14) exercise. Using the graph you printed, answer the . Thyroid gland Thyroxine Metabolic rate and oxygen consumption Metabolic rate and temperature regulation following questions as you proceed FIGURE 39.13 Opening screen for the laboratory exercise on Endocrine Function: Thyroid Gland and Metabolic Rate. Ph.I.L.S 0Explanation / Answer
As the metabolic rate decreases the body temperature starts to decline which is picked up by the hypothalamus which stimulates anterior pituitart which then secretes thyroid releasing hormone which releases T4 and T3 and T3 in blood stream acts cells to increase the metabolic activity increasing the temperature which makes a negative feedaback loop