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Kim Ferguson

Physiology Week 10

QuestionAnswer
The physiological mechanism that dissolves clots is known as fibrinolysis.
A decrease in the amount of white blood cells is called leukopenia.
A disease that develops as a result of the reaction of a mother’s Rh antibodies with her Rh-positive baby is erythroblastosis fetalis.
Platelets play an important role in blood clotting.
All of the following are components critical to coagulation except prothrombin. thrombin. fibrinogen. fibrin. none of the above; all of these components are critical to coagulation.
The term blood type refers to the type of blood cell antigen.
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin.
Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called diapedesis.
Atria are often called _____ because they receive blood from vessels called veins. receiving chambers
A type of abnormal heart sound that may signify incomplete closing of the valves is a heart murmur.
The free edges of the atrioventricular valves are anchored to the papillary muscles.
Which division of the autonomic nervous system sends fibers to the heart? sympathetic parasympathetic both A and B
The normal cardiac impulse that initiates mechanical contraction of the heart arises in the SA node.
The heart valves that are located where the trunk of the pulmonary artery joins the right ventricle and where the aorta joins the left ventricle are called semilunar valves.
Mechanical devices that permit the flow of blood in one direction only are called valves.
After blood leaves the lungs and returns to the heart, it enters the left atrium.
Which layer of the larger blood vessels is made up of endothelium? tunica intima
The _____ drains much of the superficial leg and foot. great saphenous vein
Renal veins drain blood from the kidneys.
The outermost layer of the larger blood vessels is the tunica adventitia.
During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? It flows into the inferior vena cava.
Which types of arteries are also called conducting arteries and include the aorta? elastic arteries
The internal iliac artery supplies blood to the pelvis.
Which two factors promote the return of venous blood to the heart? blood-pumping action of respirations and skeletal muscle contractions
Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. protein molecules present
The term used to describe the collection of mechanisms that influence the circulation of blood is: hemodynamics.
Factors that affect the strength of myocardial contraction are called inotropic factors.
Blood pressure is measured with the aid of an apparatus known as a(n) sphygmomanometer.
The mechanisms of which three hormones work together to regulate blood volume? aldosterone, ANH, and ADH
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of vasodilation.
Starling’s law of the heart states that, within limits, the longer, or more stretched, the heart fibers are at the beginning of the contraction, the stronger the contraction.
Which two factors promote the return of venous blood to the heart? blood-pumping action of respirations and skeletal muscle contractions
The term blood type refers to the type of blood cell antigen.
A decrease in the amount of white blood cells is called leukopenia.
Factors that affect the strength of myocardial contraction are called inotropic factors.
Blood volume per kilogram of body weight varies inversely with: body fat.
Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: hematopoietic stem cells.
Which are the two baroreceptors that are located near the heart? aortic baroreceptors and carotid baroreceptors
The localized pressure gradient needed to maintain blood flow in a tissue is called perfusion pressure.
What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium? Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium.
Which of the following is not true of ventricles? They are the pumping chambers of the heart. The myocardium of the ventricles is thicker than that of the atria. The myocardium of the left ventricle is thicker than that of the right ventricle. All of the above are true of the ventricles.
Which of the following is(are) involved in determining a person’s total blood volume? Age Body type Sex All of the above
Cardiac output is determined by stroke volume and heart rate.
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of vasodilation.
In the extrinsic pathway of stage 1 of the clotting mechanism, chemicals released from damaged tissues trigger the cascade of events that ultimately result in the formation of prothrombin activator.
The physiological mechanism that dissolves clots is known as fibrinolysis.
Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. protein molecules present
_____ is used to determine the volume percentage of red blood cells in whole blood. Hematocrit
All of the following are true statements except: both atria receive their blood supply from branches of the right and left coronary arteries.
All of the following are components critical to coagulation except prothrombin. thrombin. fibrinogen. fibrin. none of the above; all of these components are critical to coagulation.
The term used to describe the collection of mechanisms that influence the circulation of blood is: hemodynamics.
The mechanisms of which three hormones work together to regulate blood volume? aldosterone, ANH, and ADH
The vagus is said to act as a “brake” on the heart. This situation is called vagal inhibition.
Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called diapedesis.
The difference between systolic pressure and diastolic pressure is called pulse pressure.
_____, a natural constituent of blood, acts as an antithrombin and prevents clots from forming in vessels. Heparin
A hematocrit of 56% would be an indication of: polycythemia.
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin.
Blood pressure is measured with the aid of an apparatus known as a(n) sphygmomanometer.
The heart begins beating in the fetus at about what stage of development? After about 4 weeks
Created by: Kferguson76
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