Thyroxine injection decreased body weight gain in both growth stages. Bone length, width and weight were not affected by thyroxine injection in weaned rats. Thyroxine injection increased femur length and tail growth, but did not change bone width in suckling rats.

What do you think will happen when 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 thyroxine on the hypophysectomized rat?

Thyroxine injections increased the normal rat’s metabolic rate. Q16. TSH injections increased the normal rat’s metabolic rate.

Which of the rats developed a goiter after injection with thyroxine explain quizlet?

The Hypox rat became hyperthyroidic and developed a goiter, which is similar to the normal rat. The dose was too large. What was the effect of propylthiouracil (PTU) injections on the normal rat’s BMR?

What was the effect of thyroxine on the Thyroidectomized rat metabolic rate?

The hypophysectomized rat had a lower baseline metabolic rate because removal of the pituitary gland, or hypophysis, prevented TSH production. Explain why thyroxine had these effects. The effect of thyroxine is to increase baseline metabolic rate.

What was the effect of thyroxine injections on the Thyroidectomized rats BMR How does the BMR in this case compare with the normal rats BMR?

what was the effect of thyroxine injections on the mormal rat’s BMR? The hypophysectomized rat bmr increased with tsh. the bmr was just below the normal rat but still lower the syringe amount was a little too low.

What is thyroxine responsible for?

Thyroxine plays a crucial role in heart and digestive function, metabolism, brain development, bone health, and muscle control. It affects almost all of the body’s systems, which means proper thyroxine levels are vital for health.

Which of the following is the primary effect of the thyroid hormones T3 and T4?

The main activity of the thyroid hormones T3 and T4 is to boost the basal metabolic rates of proteins, fats, and carbohydrates as well as vitamins.

What is the function of a tropic hormone?

Tropic hormones are hormones that act on endocrine glands, usually inducing them to secrete other hormones. They are produced by the hypothalamus and anterior pituitary gland.

Why is iodine important in our diet and what diseases are caused due to the lack of iodine?

Your body uses iodine to make thyroid hormones. That’s why an iodine deficiency can cause hypothyroidism, a condition in which the body can’t make enough thyroid hormones. Luckily, deficiency is easy to prevent. Adding a dash of iodized salt to your main meals should help you meet your requirements.

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

Propylthiouracil reduced growth rate in young rats and caused weight loss in adult rats. The latter effect appeared to be true tissue loss because water contents of heart, kidney, testes, liver, psoas, aorta and adrenal were unaffected.

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

How does the fact that the rats are ovariectomized explain their baseline T scores? They were used since they no longer produce estrogen and this experiement tested estrogen therapy or calcitonin therapy. The rats all had osteoporosis since estrogen loss weakens bone growth, which is why they had baseline T scores.

What effect will the calcitonin injections have on the calcitonin treated rats vertebral bone density?

What effect will the calcitonin injections have on the calcitonin-treated rat’s vertebral bone density? The calcitonin injections will not change the rat’s vertebral bone density (indicated by an unchanging T score). a placebo on bone density. osteoporosis was evident prior to the injections of estrogen.

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 your hypothesis for this experiment recall how administering PTU?

What is your hypothesis for this experiment? Recall how administering PTU affects the body’s ability to regulate its metabolic rate. If an organism cannot regulate its temperature through metabolic rate, it will rely on shivering, which requires a greater use of oxygen.

Why does PTU cause a goiter?

Because the drug readily crosses placental membranes, propylthiouracil can cause fetal goiter and cretinism when administered to a pregnant woman (see Precautions, Pregnancy).

What effect will the saline injections have on the control rat’s vertebral bone density?

The saline injections will not change the rat’s vertebral bone density (indicated by an unchanging T score).

Does PTU increase or decrease metabolic rate?

There was found to be a significant reduction in liver weight to body weight ratio in the PTU-treated animals, which probably resulted from the lowered metabolic rate since the liver functions in connection with carbohydrate, fat, and protein metabolism.