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Physiology Final

QuestionAnswer
From which vessels do myocardial cells receive blood? coronary arteries
The joint between the pubic portions of each coxal bone is the pubic symphysis.
The very small bone that lies just posterior and lateral to each nasal bone is the lacrimal.
The most common type of cartilage is hyaline.
The molecule that makes up 95% of the dry weight of each red blood cell and is responsible for the red pigment is hemoglobin
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
Which layer of the larger blood vessels is made up of endothelium? tunica intima
Renal veins drain blood from the kidneys
Atria are often called _____ because they receive blood from vessels called veins. receiving chambers
The type of membranous tissue that lines the heart and blood vessels is the endothelium
The vagus is said to act as a "brake" on the heart. This situation is called vagal inhibition.
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.
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.
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin.
A decrease in the amount of white blood cells is called leukopenia
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
_____ is used to determine the volume percentage of red blood cells in whole blood. Hematocrit
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
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.
Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called diapedesis.
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
A hematocrit of 56% would be an indication of: polycythemia.
Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. protein molecules present
All of the following are components critical to coagulation except - prothrombin. - thrombin. - fibrinogen. - fibrin.
Factors that affect the strength of myocardial contraction are called inotropic factors.
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of vasodilation
The localized pressure gradient needed to maintain blood flow in a tissue is called perfusion pressure.
Microscopic vessels that carry blood from small arteries to small veins are capillaries
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 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.
After blood leaves the lungs and returns to the heart, it enters the left atrium.
The heart has its own special covering, a loose-fitting inextensible sac called the pericardium
Created by: user-1972964
 

 



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