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Chap 27,28,29,30

Week 10 The Heart & Blood

QuestionAnswer
The _____ drains much of the superficial leg and foot. great saphenous vein
In _____, blood moves from veins to other veins or arteries to other arteries without passing through an intervening capillary network. vascular anastomoses
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.
Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: hematopoietic stem cells
A graphic record of the heart’s electrical activity is a(n ECG
Which layer of the larger blood vessels is made up of endothelium? tunica intima
The normal ECG is composed of all of the following except a E Wave
After blood leaves the lungs and returns to the heart, it enters the left atrium
Mechanical devices that permit the flow of blood in one direction only are called valves
Microscopic vessels that carry blood from small arteries to small veins are capillaries.
A decrease in the amount of white blood cells is called leukopenia.
Atria are often called _____ because they receive blood from vessels called veins. receiving chambers
Blood flow from the heart through blood vessels to all parts of the body and back to the heart is referred to as _____ circulation. systemic
During fetal circulation, what opening in the septum, between the right and left atria, directs most of the blood so that it bypasses the fetal lungs? foramen ovale
The bulk of the heart wall is the thick, contractile middle layer called the myocardium.
Which of the following is not a formed element found in the blood? Plasma
The type of membranous tissue that lines the heart and blood vessels is the endothelium.
The normal cardiac impulse that initiates mechanical contraction of the heart arises in the SA Node
Which types of arteries are also called conducting arteries and include the aorta? elastic arteries
Which sphincters function as regulatory valves that reduce the flow of blood through a network of capillaries when they contract and constrict the arterioles? precapillary sphincters
he free edges of the atrioventricular valves are anchored to the papillary muscles.
Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called diapedesis.
The four structures that compose the conduction system of the heart are the SA node, AV node, AV bundle, and Purkinje fibers.
Which division of the autonomic nervous system sends fibers to the heart? sympathetic somatic parasympathetic Both A & B , sympathetic parasympathetic
The _____ is(are) supplied with blood from the left subclavian artery. head and upper extremities
From which vessels do myocardial cells receive blood? coronary arteries
The heart has its own special covering, a loose-fitting inextensible sac called the pericardium.
The brachiocephalic vein drains blood from the head, neck, and upper extremity.
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.
Factors that affect the strength of myocardial contraction are called inotropic factors.
Cardiac output is determined by stroke volume and heart rate.
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.
The localized pressure gradient needed to maintain blood flow in a tissue is called perfusion pressure.
Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. protein molecules present
The difference between systolic pressure and diastolic pressure is called pulse pressure.
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of vasodilation.
Created by: Crystal C
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