What hormone is a Thyroidectomized rat missing?
If an animal has been thyroidectomized, what hormone(s) would be missing in its blood? it would be missing Thyroxine in its blood, also known as t4, since thyroid gland is removed.
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.
Which hormone would be missing in blood of a hypophysectomized rat?
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 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.
Why were ovariectomized rat used in this experiment?
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.
How would you treat a Thyroidectomized animal so that it functions?
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?
Why were ovariectomized rats used in this experiment How does the fact that the rats Areovariectomized explain their baseline T scores?
What is the effect of thyroid stimulating hormone?
TSH stimulates thyroid hormone secretion through enhancing iodide uptake, thyroglobulin synthesis, and thyroperoxidase activity. Additionally, TSH also increases blood flow to the thyroid gland and stimulates hypertrophy and hyperplasia of thyroid follicular cells to exert growth effects on the thyroid gland.[6]
How does administering PTU affect the body’s ability to regulate?
Recall how administering PTU affects the body’s ability to regulate its metabolic rate. … PTU inhibits thyroid hormone. This will increase the metabolic rate as evidenced by higher increased) oxygen c sumption from less shivering.
What is PTU for thyroid?
Propylthiouracil (PTU) is an oral medication that is used to manage hyperthyroidism which is due to an overactive thyroid gland. It is an anti-thyroid drug that has a mechanism of action that is similar to methimazole (Tapazole). Graves’ disease is the most common cause of hyperthyroidism.
What happens to the rat’s vertebral bone density with estrogen injections?
Predict Question 2: What effect will the estrogen injections have on the estrogen-treated rat’s vertebral bone density? Your answer : a. The estrogen injections will increase the rat’s vertebral bone density (indicated by a less-negative T score).
How would u treat a Thyroidectomized animal so that it functions like a normal animal?