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.
why do we get shock when we touch an open wire?
Which class of microflora would you expect to be most active under following conditions. i ) In rice paddies requiring nitrogen - blue-green algae ii) In acid soils - so
For all other wastes i) Burial The spillage could be buried using any of the following methods: The spillage could be mixed with sand and buried deep. Examples: Iodine
Explain Precipitation - Antigen-Antibody Interaction If Ag-Ab are present in an appropriate ratio, they form a precipitate in blood. Turbidity is developed, this can be measure
What is necessary to restore the Marshall wetland in Margibi County, Liberia? The Marshall wetland has several features , including mangrove swamp, which is being degraded in some
#2 DESCRIBE THE APPEARANCE OF THE STOMATE AND THE GUARD CELLS.
Biological Basis of Aggression: Studies show that mild electrical stimulation of a specific region of the hypothalamus - produces aggressive behaviour in animals. When a cat'
What is the structure of the urinary bladder? The bladder is composed of four layers of tissues. The outermost serous membrane is a thin membrane lining the closed cavities of
Chemistry in golden era: Chemistry In the field of metallurgy too we notice some remarkable developmenk. Before the close of the sixteenth century, zinc was isolated by a pr
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