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.
Explanation:
A point mutation or substitution is a genetic mutation where a single nucleotide base is changed, inserted or deleted from a DNA or RNA sequence of an organism's genome.
Answer:
5.37 °C
Explanation:
The optimal condition for most enzymes in the small intestine is 37 °C.
Enzymes are responsible for mediating several biological processes in the human body. The optimal condition for enzymes in the small intestine has an optimum pH of about 7.5 and the temperature is 37 °C, which is the normal body temperature of the human body.
Hence, the correct option is "5. 37 °C".
Starting with a newly divided cell, the correct sequence for the human cell cycle phases are interphase followed by mitosis and then cytokinesis.
Interphase of the cell cycle does not involve any cell division. It is a period of growth and replication of the nuclear DNA. The cell prepares for the division in this stage. Interphase is further divided into the G1, S and G2 phases. Mitosis is the next phase of the cell cycle which involves the division of the cell in order to form daughter cells. Mitosis is further divided into the prophase, metaphase, anaphase and the telophase. Cytokinesis marks the end of the mitosis and this is where the cell actually separates to produce two daughter cells.
To learn more about interphase here
brainly.com/question/13622952
#SPJ4
I think your answer is C but i’m not sure