17 and 20 Flashcards
Which of the following formed elements mostly determines the viscosity of blood?
Red blood cells
Which of the following cells help regulate immune response
Helper T cells
Which of the following blood types is known as the universal recipient?
AB
What is the percentage of red blood cells replaced everyday in the body?
1%
Platelets are formed from which of the following cells in the bone marrow ?
Megakaryocytes
Lymphoid tissue that appears as swelling of the mucosa in the oral cavity is called a(n):
Tonsil
The common pathway of coagulation begins with which of the following?
Activation of a clotting factor that converts prothrombin to thrombin
Specific defenses depend on activities of which of the following?
Lymphocytes
AIDS interferes with the action of which of the following cells?
Helper T cells
When the body is deliberately exposed to an antigen this is known as
Active artificial immunity
Which of the following are the three major types of effector T cells?
Regulatory, helper, and cytotoxic T cells
Hemophilia A is a hereditary bleeding disorder caused by deficiency of which clotting factor?
VIII
Most procoagulants are formed by which of the following?
Liver
What is the average blood volume in an adult?
5 liters
Which of the following are formed elements of the blood?
Blood cells
