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stealth61 [152]
3 years ago
13

What was the effect of thyroxine injections on the hypophysectomized rat's bmr? how does the bmr in this case compare with the n

ormal rat's bmr? was the dose of thyroxine in the syringe too large, too small, or justright?
Biology
1 answer:
denis23 [38]3 years ago
5 0
Thyroxine is a hormone that is  secreted by the thyroid gland to the blood stream. BMR is the basal metabolic rate that is affected by the levels of thyroxine hormone in the system. Hypophysectomy is the removal of the pituitary gland from an organism, in this case the rats. BMR rate of the rat seemed to increase with the injection of thyroxine however the BMR was still lower than the BMR of a normal rat with the thyroid gland  and the dose was too low.
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monitta

Answer:

The correct answer is E.

Explanation:

  • Paul Ehrlich is the scientist who discovered a treatment for the disease Syphilis in the year 1900 which was then named Magic Bullet as a concept. This answer is correct.
  • Alexander Fleming was a Scottish scientist and while he was working on a cure for influenza, commonly known as flu, after a coincidence on one of his experiments he discovered a substance. He observed that it killed the bacteria that it came into contact with and named it Penicilin.
  • Howard Florey and Ernst Chain are scientist who picked up Fleming's discovery of penicilin and tried to improve it. As a result of their experiments, they discovered a technique that was used to make a more pure and concentrated penicilin.
  • Kirby Bauer method is used to find out if a certain type of bacteria has any sensitivity to a specific type of antibiotic.

The correct answer is E, none of the pairs are mismatched.

I hope this answer helps.

5 0
3 years ago
Damaged tissue releases chemicals that activate platelets and stimulate the formation of blood clots. Which of the following pre
Zielflug [23.3K]

Hello! I figured your question was lacking its options so I went online to find them and here they are:

A. Activated platelets release chemicals that  inhibit blood clot formation.

B. Activated platelets release signaling  molecules that inhibit cell division in  damaged tissue.

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D. Activated platelets release chemicals that  activate more platelets.

Answer:

The correct answer is: D) Activated platelets release chemicals that  activate more platelets.

Explanation:

<u>Positive feedback</u><u> is a mechanism in which a stimulus triggers an intensification of this same stimulus.</u>

When a tissue is damaged, the platelets participate in a process called platelet adhesion that consists of contacting and sticking to the collagen fibers of the connective tissue under the damaged endothelial cells. This platelet adhesion <u>activates</u> the platelets and makes them grow projections to contact and interact with one another, while releasing substances to activate other nearby platelets. The accumulation and the attachment of large numbers of platelets ultimately form a <u>platelet plug</u>.

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<u>Answer:</u>

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<u>Explanation:</u>

Took the quiz, got 100% with these answers.

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