Human Anatomy and Physiology Quiz

Tight junctions between epithelial cells primarily function to:

• Permit free passage of ions

• Prevent leakage of materials between cells

• Anchor cells to the basement membrane

• Provide mechanical support

• Allow selective transport of proteins

The connective tissue that forms the internal framework of lymph nodes and spleen is:

• Dense regular connective tissue

• Reticular connective tissue

• Areolar connective tissue

• Adipose tissue

• Elastic tissue

Smooth muscle is characterized by:

• Striations and multiple nuclei

• Non-striated, spindle-shaped cells with central nuclei

• Rapid voluntary contractions

• Presence of sarcomeres

• Peripheral nuclei

In dense irregular connective tissue, collagen fibers are arranged:

• In parallel bundles

• In concentric rings

• Randomly in multiple directions

• In straight vertical lines

• Along muscle fibers only

The main pigment present in red blood cells is:

• Myoglobin

• Hemoglobin

• Bilirubin

• Melanin

• Albumin

The process by which immature red blood cells mature in the bone marrow is known as:

• Erythropoiesis

• Hemostasis

• Hemolysis

• Leukopoiesis

• Thrombopoiesis

Iron is essential for hemoglobin synthesis because it:

• Enhances plasma osmotic pressure

• Forms the heme portion that binds oxygen

• Catalyzes antibody formation

• Stabilizes the globin chain structure

• Regulates coagulation

Destruction of red blood cells releases heme, which is converted in the liver into:

• Bilirubin

• Albumin

• Globin

• Fibrin

• Ferritin

The process of stopping bleeding after vascular injury is called:

• Hemolysis

• Hemostasis

• Fibrinolysis

• Hematopoiesis

• Agglutination

A person with type A blood has:

• A antigens on red cells and anti-B antibodies in plasma

• B antigens and anti-A antibodies

• Both A and B antigens

• No ABO antigens

• Anti-A and anti-B antibodies