Thrombocytes, also known as platelets, play a crucial role in the blood clotting process. Let's go through the statements provided in the question to identify which one is not true:
a. Thrombocytes vary in shape and size: True. Thrombocytes can vary in size and shape, and this variability is normal among these blood components.
b. Thrombocytes lack a nucleus: True. Thrombocytes are unique among blood cells as they do not have a nucleus. This absence of a nucleus allows them to be more flexible and efficient in their function.
c. Thrombocytes fight infection: Not true. Thrombocytes are primarily involved in blood clotting and do not play a significant role in fighting infections. That role is mainly carried out by white blood cells (leukocytes).
d. Thrombocytes are required for the clotting process: True. Thrombocytes are essential for the blood clotting process. When a blood vessel is injured, thrombocytes adhere to the site of injury and form a plug to stop bleeding. They also release substances that promote clotting.
Therefore, the statement that is not true of thrombocytes is:
c. Thrombocytes fight infection.
