Your answer : b. The hypophysectomized (Hypox) rat’s BMR will be higher than the normal rat’s BMR. Predict Question 2: What do you think will happen after you inject thyroxine into the three rats? Your answer : a. The normal rat will become hyperthyroidic and develop a goiter. Predict Question 3: What do you think will happen after you inject TSH into the three rats? Your answer : a.

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The normal rat will become hyperthyroidic and develop a goiter. Predict Question 4: Propylthiouracil (PTU) is a drug that inhibits the production of thyroxine by blocking the attachment of iodine to tyrosine residues in the follicle cells of the thyroid gland (iodinated tyrosines are linked together to form thyroxine). What do you think will happen after you inject PTU into the three rats? Your answer : d. The normal rat will become hypothyroidic and develop a goiter. Stop & Think Questions:

1h. Calculate the oxygen consumption per hour for this rat using the following equation. ml O2 consumed/1 minute x 60 minutes/hour = ml O2/hour

Enter the oxygen consumption per hour in the field below and then click Submit to display your results in the grid. You answered: 420 ml O2/hr

1i. Now that you have calculated the oxygen consumption per hour for this rat, you can calculate the metabolic rate per kilogram of body weight with the following equation (note that you need to convert the weight data from grams to kilograms to use this equation).

Metabolic rate = (ml O2/hr)/(weight in kg) = ml O2/kg/hr

Enter the metabolic rate in the field below and then click Submit to display your results in the grid. You answered: 1673.306773 ml O2/kg/hr 2h. Calculate the oxygen consumption per hour for this rat using the following equation. ml O2 consumed/1 minute x 60 minutes/hour = ml O2/hour Enter the oxygen cnsumption per hour in the field below and then click Submit to display your results in the grid. You answered: 384 ml O2/hr 2i. Now that you have calculated the oxygen consumption per hour for this rat, you can calculate the metabolic rate per kilogram of body weight with the following equation (note that you need to convert the weight data from grams to kilograms to use this equation).

Metabolic rate = (ml O2/hr)/(weight in kg) = ml O2/kg/hr

Enter the metabolic rate in the field below and then click Submit to display your results in the grid.

You answered: 1567.346939 ml O2/kg/hr

3h. Calculate the oxygen consumption per hour for this rat using the

following equation. ml O2 consumed/1 minute x 60 minutes/hour = ml O2/hour

Enter the oxygen consumption per hour in the field below and then click Submit to display your results in the grid. You answered: 378 ml O2/hr

3i. Now that you have calculated the oxygen consumption per hour for this rat, you can calculate the metabolic rate per kilogram of body weight with the following equation (note that you need to convert the weight data from grams to kilograms to use this equation).

Metabolic rate = (ml O2/hr)/(weight in kg) = ml O2/kg/hr

Enter the metabolic rate in the field below and then click Submit to display your results in the grid. You answered: 1549.180328 ml O2/kg/hr

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800).

The normal rat is

You correctly answered: b. euthyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800).

The thyroidectomized (Tx) rat is

You correctly answered: a. hypothyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800).

The hypophysectomized (Hypox) rat is

You correctly answered: a. hypothyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or

hyperthryoid (high thyroid levels; BMR above 1800) after the thyroxine injection.

The normal rat is

You correctly answered: c. hyperthyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the thyroxine injection.

The thyroidectomized (Tx) rat is

You correctly answered: c. hyperthyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the thyroxine injection.

The hypophysectomized (Hypox) rat is

You correctly answered: c. hyperthyroid

Which of the rats developed a goiter after injection with thyroxine (select all that apply)? You correctly answered: d. None of the rats developed a goiter with this injection. Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the TSH injection.

The normal rat is

You correctly answered: c. hyperthyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the TSH injection.

The thyroidectomized (Tx) rat is

You correctly answered: a. hypothyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the TSH injection.

The hypophysectomized (Hypox) rat is

You correctly answered: c. hyperthyroid

Which of the rats developed a goiter after injection with TSH (select all that apply)? You correctly answered: a. the normal rat c. the hypophysectomized rat Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the PTU injection.

The normal rat is

You correctly answered: a. hypothyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the PTU injection.

The thyroidectomized (Tx) rat is You correctly answered: a. hypothyroid

Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid (“good,” or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800) after the PTU injection.

The hypophysectomized (Hypox) rat is You correctly answered: a. hypothyroid Which of the rats developed a goiter after injection with PTU (select all that apply)? You correctly answered: a. the normal rat