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.
Making a 'gusher' with compressed air Secure a large narrow-necked bottle like as is used for soda water. Place a single-hole stopper in the bottle. By the stopper put a 10- cm
A look at Microwave Processing The first thing which comes to our mind while on the topic of microwave processing is what microwaves are? Microwaves are basically electromagne
define carbohydrates.give a brief account on classification of carbohydrates.
Define Creatinine in Urine Creatinine: It is an end-product of protein metabolism, an anhydride of creatine, found in the blood and urine that can be used to help assess if the
Depletion of Ozone Layer: Since the last decade or so, there is concern about the possible reduction in the ozone layer surrounding the earth. Now the question arises, what h
Which minerals best illustrates the property of cleavage: Mica
Explain Sinus Bradycardia - Electrocardiogram If the SA node discharge rate is slow, the heart rate is slow. ECG is normal in every respect except that the heart rate at rest i
one function of the weatherock is?
Define Protein Hormone and Steroid Hormone Further, hormones are of two different chemical types - protein hormone and steroid hormone. Most of the hormones belong to the categ
what is the weigt on earth of an object that has a mass of 22 kg?
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