What hormones will be missing in the rat that was Hypophysectomized?

If an animal has been hypophysectomized, what effect would you expect to see in the hormone levels in its body? TSH levels will be missing because the pituitary gland is removed, so decreased metabolic rate.

What was the effect of TSH on the Thyroidectomized rat?

The thyroidectomized rate had no thyroid gland for TSH to stimulate, so in this case TSH injections could not increase thyroid hormone production and thus could not increase metabolic rate. Q21. A goiter is an enlarged thyroid gland. The thyroidectomized rat does not have a thyroid gland to become enlarged.

Why were ovariectomized rats used in this experiment How does the fact that the rats are ovariectomized explain their baseline T scores quizlet?

Ovariectomized rats were used in this experiment to ensure control over the hormones in the rats. Without the ovaries, the rats were not able to produce estrogen, and therefore had low baseline T scores already, since estrogen stimulates bone growth and protects against osteoprosis.

What do you think will happen after you inject TSH into three rats?

What do you think will happen after you inject TSH into the three rats? The normal rat will become hyperthyroidic and develop a goiter.

What was the effect of the propylthiouracil PTU on the Thyroidectomized rat?

It decreased BMR in normal and hypophysectomized rats because propylthiouracil blocks the attachment of iodine to tyrosine residues and interferes with the conversion of thyroxine to triiodothyronine.

Which hormones stimulates the pituitary gland to release ACTH?

Corticotropin-releasing hormone (CRH) is released from the hypothalamus, which stimulates the anterior pituitary to release adrenocorticotropic hormone (ACTH).

Why did the TSH have no effect on the BMR of the Thyroidectomized rat quizlet?

The effect of TSH was to increase the normal rat’s BMR. There was no effect on the thyroidectomized rat’s BMR with the injection of TSH because there was no thyroid gland to stimulate.

How would Administration of propylthiouracil affect the metabolic rate of a Thyroidectomized rat?

It prevents the thyroid hormone production and so would cause a decreased metabolic rate. 1. Propylthiouracil prevents thyroid hormone synthesis. Propylthiouracil has no effect in the thyroidectomized and hypophysectomized rats.

Which hormones stimulates the breakdown of polymerized glucose?

Insulin and glucagon are potent regulators of glucose metabolism.

How is a Thyroidectomized rat treated?

SUMMARY. Cold-exposed, thyroidectomized rats have been treated with the same daily substitution dose of thyroxine (6y–12y) as prevented vacuoles from arising in the anterior pituitary basophiles of likewise thyroidectomized rats kept at a temperature of -f 25°–+30° C.

How would you treat Thyroidectomized animal so that it functions like a normal animal?

How would you treat a thyroidectomized animal so that it functions like a “normal” animal? Provide the animal T4 supplements. As a result of the missing hormone(s) in the hypophysectimized rat, what would be some expected symptoms? An injection of thyroxine to an otherwise normal rat will cause which of the following?

What was the effect of propylthiouracil on the normal rat BMR Why did this rat develop a palpable goiter?

Why did this rat develop a palpable goiter? The effect of PTU injections on the normal rat was to decrease the BMR. The palpable goiter was due to the buildup of the precursors to thyroxine.