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
Which of the following are small organs that are found along lymphatic vessels?
Lymph nodes
Water composes what percentage of plasma volume?
90%
Most of the lymph returns to venous circulation via which of the following?
Thoracic duct
Immune surveillance occurs via the action of which of the following?
Macrophages and lymphocytes
Antibodies bind to specific chemical targets called
:
antigens.
