Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Define the functions of platelets
The main function of platelets, or thrombocytes, is to stop the loss of blood from wounds, i.e. haemostasis. Let us learn about this function. The platelets:
i) Release a chemical substance called serotonin, that cause vasoconstriction. This ensures reduced flow of blood from the injured site,
ii) Aggregate to plug the vascular plug at site of injury, and
iii) Have like skeletal muscles, actin and myosin proteins, which contract to bring about clot retraction. This ensures normal flow of blood around the sealed injured blood vessel.
The plug formed by the platelet arrests bleeding. The time taken for the blood to cease flowing from an injured site is termed as bleeding time. The platelet plug that is formed is friable and cannot be relied to check bleeding for very long. The blood forms a fibrin meshwork of threads that forms a better plug. This may take a few minutes before such a first aid mechanism acts in the body. The time taken for a clot to form is termed as clotting time. Before a patient is taken to the operation theatre, the doctor assesses the bleeding and clotting time to prevent excessive loss of blood during time of operation. The patient whose bleeding time is less than 4 minutes and clotting time is less than 12 minutes may be taken up for surgery after the other investigations are normal. So far, we have learnt about the constituents and functions of blood - the fluid connective tissue.
what is the plant cells roll?
what is the decimals for 23
Explain Cell - The Basic Unit of Life You must be aware of the fact that the cell is the basic unit of life. What do you understand by the term 'cell'? What are the components
Explain the Composition of Bile Bile is a complex fluid. It is yellowish green in colour and bitter in taste. It consists of: Water Mineral salts (chloride, potassium
Explain Error catastrophe theory of Ageing As the cells age, there is a random increase in error in protein synthesis due to insertion of wrong amino acids. They become non- fu
WERE IS IT IN THE BODY
A soil with a large buffering capacity can be expected to have: A. A tremendous amount of iron oxides B. Little ability to retain basic cations C. A high ability to retain cation
Specific Acquired Immunity Body in the long run develops specific immune mechanisms for each species. These mechanisms are not innate but are acquired after exposure to the spe
Explain Immunohistochemistry Here the Ag is tagged with a fluorescent dye (e.g. rhodamine). Inspite of a tag, the Ab binds to the Ag. In the section of a tissue, the Ag with ta
Q.What is the greenhouse effect? Some gases like carbon dioxide, methane, nitrous oxide prevent the escape of heat from the Earth's surface by trapping it. This increases the av
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd