BIOL 215 - Exam 1 Review

(Ch. 19; Blood) All RBCs, WBCs, and platelets are derived from a population of stem cells known as

• Myeloid Stem Cells

• Hemocytoblasts

• reticulocytes

• lymphoid stem cells

(Ch. 19; Blood) Why is AB- the universal receiver?

• It has no antibodies

• It has no antigens

• It has both antibodies

• It lacks the Rh factor

(Ch. 19; Blood) Serum is:

• Plasma without clotting factors

• The colloid from plasma

• The same as plasma

(Ch. 19; Blood) Hematopoiesis is the process of blood cell production

• True

• False

(Ch. 19; Blood) The process of dissolving a clot is called

• Fibrinolysis

• Clot contraction

• Embolism

• Thrombosis

(Ch. 20; Heart) The plateau in cardiac muscle action potentials is due to:

• Ca2+ channels open

• K+ channels open

• Na+ channels close

(Ch. 20; Heart) The pacemaker potential that allows autorhytmicity is associated with:

• A small number of Na+ channels remaining open

• Passive Ca2+ open

• K+ channels closed

(Ch. 20; Heart) Pulmonary circuit carries ______ to the ______.

• Deoxygenated blood; lungs

• Oxygenated blood; systemic tissues

• Oxygenated blood; coronary tissue

(Ch. 20; Heart) Blood moves from the right ventricle to the lungs via the ______.

• Pulmonary trunk

• Pulmonary veins

• Aorta

• Superior & Inferior Vena Cava

(Ch. 20; Heart) The second heart sounds (AKA "dupp" or "dub") is caused by:

• caused by the closure of the aortic and pulmonary semilunar valves

• caused by ventricular systole

• caused by the closing of the atrioventricular valves

• caused by turbulent flow into the ventricles