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Degger [83]
3 years ago
6

What mammal received the first successful blood transfusion in history?

Medicine
1 answer:
navik [9.2K]3 years ago
3 0

Answer:

The first successful blood transfusion recorded was performed by British physician Richard Lower in 1665 when he bled a dog almost to death and then revived the animal by transfusing blood from another dog via a tied artery.

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QUESTION 4
olga55 [171]

Answer:the hip

Explanation:

You place it closest to the missing limb so if it was the arm you would clip near shoulder.

4 0
3 years ago
You witness someone suddenly collapse the person is unresponsive
mezya [45]

Answer: Not totally certain if you have any multiple choice answers or anything but here's a general idea of what I would write in response.

Explanation: First step is always going to be asking them if they're okay, the question says they're unresponsive so you want to access the situation. If they are spasming and signs lead to them having a seizure your going to immediately call for an ambulance, don't try to restrain them unless they are potentially going to hurt themselves ie. falling off of something or hitting something dangerous nearby. Restraining them can potentially damage their nerves and muscles more than just letting them flail.

If they don't seem to be having any signs of a seizure then you want to check if they're breathing. If they aren't you need to start performing cpr. Have someone nearby call an ambulance or call 911 and ask for walk-through steps if you aren't certified, that way you know what your doing and you can have that support you if they try to sue you (which won't be a problem because of the good samaritan law anyways) You want to get them laying on their back, tilt their head and make sure nothings restricting their air flow. Then your going to do a couple breaths, if they don't start breathing you'll begin compressions. Compressions, breath, compressions breath. I reccommend looking up appropriate compression techniques for different age people and how to correctly administer if you aren't already aware since I don't want to write a whole article here- I hope this helped!

3 0
2 years ago
Which of the following reactions with covalently closed, circular DNA (cccDNA) does NOT result in a new linking number? A. incub
alisha [4.7K]

Answer:

Okay

Explanation:

Human topoisomerase I plays an important role in removing positive DNA supercoils that accumulate ahead of replication forks. It also is the target for camptothecin-based anticancer drugs that act by increasing levels of topoisomerase I-mediated DNA scission. Evidence suggests that cleavage events most likely to generate permanent genomic damage are those that occur ahead of DNA tracking systems. Therefore, it is important to characterize the ability of topoisomerase I to cleave positively supercoiled DNA. Results confirm that the human enzyme maintains higher levels of cleavage with positively as opposed to negatively supercoiled substrates in the absence or presence of anticancer drugs. Enhanced drug efficacy on positively supercoiled DNA is due primarily to an increase in baseline levels of cleavage. Sites of topoisomerase I-mediated DNA cleavage do not appear to be affected by supercoil geometry. However, rates of ligation are slower with positively supercoiled substrates. Finally, intercalators enhance topoisomerase I-mediated cleavage of negatively supercoiled substrates but not positively supercoiled or linear DNA. We suggest that these compounds act by altering the perceived topological state of the double helix, making underwound DNA appear to be overwound to the enzyme, and propose that these compounds be referred to as ‘topological poisons of topoisomerase I’

8 0
4 years ago
Read 2 more answers
Lipids are broken down by bile and digestive enzymes before absorption into the body. Where does absorption take place?
Ivan

Answer:

d. small intestine

Explanation:

7 0
3 years ago
Read 2 more answers
A 12 year old boy with a history of type 1 diabetes was brough to the er because?
Rashid [163]

Answer:

A 12-year-old boy with a history of type 1 diabetes was brought to the ER because most probably he was experiencing diabetic ketoacidosis, which is a complication of type 1 diabetes.

It is a condition where the body does not produce enough insulin, or the insulin that is produced does not work well.

Explanation:

DKA is caused by too many ketones being released into the bloodstream, which causes the blood to become acidic.

The vomiting,  headache, becoming increasingly lethargic dehydration and breathlessness are the symptoms of DKA.

High blood sugar levels and ketones in his urine are the signs of DKA. DKA is a complication of type 1 diabetes, and it can be fatal. It is caused by high blood sugar levels and dehydration.

#SPJ4

brainly.com/app/ask?q=Type+I+DM

4 0
1 year ago
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