Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions?

The heart valves

The opening and closing of theheart valves is caused by

What is the sequence of events in the transmission of an impulse through the heart muscle? a: AV node b: AV bundle c: SA node d: Through the atria e: Through the ventricles f: Bundle branches g: Purkinje fibers

To initiate a cardiac muscle cell contraction, calcium

Blood moves into and then out of a heart chamber because

The plateau phase of an action potential

The units for perfusion of blood are typically

Which correctly describes the heart’s apex?

During ventricular contraction, the semilunar valves close in order to permit the blood to enter the large arterial trunks that carry blood away from the heart.

The internal wall surface of each ventricle displays large, smooth, irregular muscular ridges called

Which heart chambers containdeoxygenated blood?

As blood is pumped out of the heart and into the major arteries leaving the heart, it

Someone with a heart block would have

The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)

Which are differences between cardiac muscle tissue and skeletal muscle tissue? a: The sarcoplasmic reticulum in cardiac muscle is less extensive. b: The sarcoplasmic reticulum in cardiac muscle is more organized. c: Cardiac muscle has intercalated discs; skeletal muscle does not. d: Cardiac muscle has 1 or 2 nuclei per cell; skeletal muscle has multiple nuclei per cell. e: Cardiac muscle has more well-defined terminal cisternae.

The receiving chambers of the heart are the atria, and the forcefully pumping chambers of the heart are the ventricles.

About 70% of the ventricle filling is achieved passively without the contraction of the atria.

Arteries carry blood toward the heart, while veins carry blood away from the heart.

What are the cell-to-cell contacts of the cardiac muscle fibers called?

All of the heart’s sulci house blood vessels that supply the myocardium.

During a cardiac cycle, how many of the four chambers contract at any one time?

Which are functions performed by the fibrous skeleton of the heart? a: Separates the atria and ventricles b: Anchors the heart valves c: Provides electrical insulation between the atria and ventricles d: Provides the framework for the attachment of the myocardium e: None of these are true functions of the fibrous skeleton of the heart

The papillary muscles attach to the cusps of the atrioventricular valves by means of the

Myofibrils within cardiac muscle cells are aligned in sarcomeres.

How many oxygen molecules may bind to a single molecule of hemoglobin?

Which depicts the order of cell formation in erythropoiesis? a: Proerythroblast b: Normoblast c: Myeloid stem cell d: Reticulocyte e: Erythroblast f: Mature erythrocyte

Erythrocytes exhibit a limited lifespan due to their inability to synthesize the proteins necessary to repair themselves.

Which term best describes the function of blood when considering the presence of leukocytes and antibodies?

The smallest and most abundant plasma proteins are the

Which are characteristic of leukocytes? a: Smaller than erythrocytes b: Have a nucleus c: Have no hemoglobin d: More numerous than erythrocytes e: Depending on type, may or may not contain granules

Which term best describes the function of blood when considering the presence of carbon dioxide and endocrine hormones?

When blood is centrifuged and its components separate, the bottom of the tube holds the

Iron, lactic acid, and lipids are all considered to be nutrients in blood plasma.

For a relatively small injury, a platelet plug is formed within 1 minute.

Which type of leukocyte releases histamine?

The type of leukocyte that will migrate in the blood and take up residence in the tissues as a macrophage is a(n)

Which are the most numerous of the leukocytes?

During platelet plug formation, platelets begin to stick to

A comparison of the clinical hematocrit and true hematocrit would indicate that

If agglutination occurs after a blood transfusion, it may indicate

The antigen-antibody reaction is an example of the regulation function of blood.

Sodium, calcium, andbicarbonate are all described as plasma

Which leukocytes are derived from the myeloid line?

Prostacyclin is an eicosanoid that acts as a

  

Which are characteristic of type A blood? a: Has anti-A antibodies b: Has anti-B antibodies c: Has surface antigen A on its erythrocytes d: Has surface antigen B on its erythrocytes e: Has neither surface antigen A nor B on its erythrocytes f: Will agglutinate with blood type B

Vascular spasms last

Fibrinolysis involves ________ of the fibrin framework, and it involves the protein _______.

How many globins (protein building blocks) are found in a single hemoglobin molecule?