How did the metabolic rates of the three rats differ?
How did the metabolic rates of the three rats differ?
The metabolic rates differed between the normal rat and the surgically altered rats because the surgically altered rats could not produce specific hormones (t4 and TSH) since they no longer have either a thyroid or pituitary gland. You just studied 13 terms!
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.
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.
What effect will the saline injections have on the control rat’s vertebral bone density quizlet?
The saline injections will not change the rat’s vertebral bone density.
Why were ovariectomized rats used in this experiment quizlet?
Why were ovariectomized rats used in this experiment? 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.
Why didn’t any of the rats develop a goiter?
Why didn’t any of the rats develop a goiter after thyroxine injection? In all cases, TSH levels were not elevated by the thyroxine injection. The injection decreased the negative feedback mechanism on TSH.
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.
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?
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 saline injections have on the control rat?
Predict Question 1: What effect will the saline injections have on the control rat’s vertebral bone density? Your answer : c. The saline injections will not change the rat’s vertebral bone density (indicated by an unchanging T score).
Which of the rats developed a goiter?
The Hypox rat became hyperthyroidic and developed a goiter, which is similar to the normal rat.
Which of the rats developed a goiter after injection with TSH explain?
What do you think will happen after you inject TSH into the three rats? The normal rat will become hyperthyroidic and develop a goiter.
How does the fact that the rats are ovariectomized explain their baseline 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.
Is there a rat model of osteoporosis?
An ovariectomized rat (OVX) is a female rat whose ovaries have been removed. Currently there is no single animal model that identically represents the stages of osteoporosis in humans although there are some animals that are relatively close and can be used for the purpose of comparison.
What effect did estrogen injections have on the rat?
The estrogen injections did effect the rat. The T score went from osteoporosis to bone thinning. What effect did the administration of calcitonin injections have on the calcitonin- treated rat?
What effect did the administration of saline injections have on rats?
The rats all had osteoporosis since estrogen loss weakens bone growth, which is why they had baseline T scores. What effect did the administration of saline injections have on the control rat? How well did the results compare with your prediction? When saline ejection were administered, no effect occured.
