Answer:
Explanation:
Key developments in blood transfusion techniques
• Animal experiments over the years 1900-1916 gradually enabled transfusion to become the routine technique it is today. The key developments were:
• George Crile (1907) perfected the technique of transfusion from artery to vein using dogs, and described its application in 32 patients.
• Hustin (1914) showed that addition of sodium citrate could prevent blood from clotting and that citrated blood could be safely transfused into dogs.
• Richard Lewisohn (1915) determined the maximum amount of citrate that could be transfused into dogs without toxicity and thus determined the optimum concentration that could be added to blood for the best anticoagulant effect.
• Weil (1915) showed that citrated blood could be stored for 2 days and still be effective when transfused into guinea-pigs and dogs which had lost blood.
• Rous and Turner (1916) used rabbits to demonstrate that, with certain additives and proper treatment, citrated blood could be stored for 14 days and still be successfully transfused.
Through these animal experiments, the prolonged storage of blood without clotting thus became possible, so enabling the establishment of blood banks, and blood transfusion as a routine procedure.
ductile deformation
Explanation:
Deformation is the change in size or shape of a body due to the application of stress. There are two main types of deformation:
- Ductile deformation occurs where a body is deformed permanently without any fracturing such as seen when folds are formed.
- Brittle deformation occurs when a body changes size and shape in the presence of stress and it fractures because it is no more elastic but plastic. They produce faults and other fractures seen in rocks.
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Answer:
The law of conservation of energy states that energy
Explanation:
It can neither be created nor destroyed or only converted from one form of energy to another. This means that a system always has the same amount of energy... unless it's added from the outside. I hope this helps.
Answer:
The correct answer is - option C. electrogenic ion pumps
Explanation:
The CFTR protein which acts as the chloride ion Channel this Chanel is belongs to the Electrogenic pumps. These are also is categorize as the ABC Protein channel.
Electrogenic pumps are primary active transporters that hydrolyzes the ATP and the produced energy is used to transfer ions (cl ion in this case) across the membrane to generate the gradient across the membranes.
Thus, the correct answer is - option C. electrogenic ion pumps.
The answer is <span>5.2 × 10-2 newtons.
To calculate this, we will use Coulomb's Law:
</span>F =
where F is repulcive force, k is constant, Q is charge, r is distance between charges.
<span>
If:
</span>
=
= 1.2 ×
C²
r = 5.0 ×
C²
k = 5.0 ×
Then:
<span>
</span>⇒
⇒
⇒
