Exam 1 (61-80) Flashcards
When dissecting a specimen, the students noticed that the arteries were thick and more elastic than veins. Why?
A. veins return blood to the heart against gravity.
B. arteries contain a greater volume of blood
C. veins have valves
D. arteries are under greater pressure
E. arteries have less smooth muscle than veins
D. arteries are under greater pressure
What is the role of the lymphatic system with respect to the cardiovascular system?
A. collecting excess tissue fluids and returning them to the cardiovascular system
B. collecting excess tissue fluids and returning them to the urinary system
C. producing excess tissue fluids and returning them to the cardiovascular system
D. producing excess tissue fluids and returning them to the urinary system
E. prevention of infection
A. collecting excess tissue fluids and returning them to the cardiovascular system
What are the upper chambers of the heart called?
A. atria
B. auricles
C. AV valves
D. ventricles
E. septa
A. atria
What are the string-like structures in the heart that anchor the atrioventricular valves?
A. cingulated pectoral
B. chordae tendineae
C. corpus albicans
D. corpus callosum
E. chloride plexus
B. chordae tendineae
Blood leaves which chamber of the heart to enter the lungs?
A. right atrium
B. left atrium
C. right ventricle
D. left ventricle
E. aorta
C. right ventricle
A person who sits on a flight for hours on a long airplane flight may have problems with blood pooling below the knees. Why?
A. the valves in the leg veins do not work above a certain altitude
B. blood pressure drops on long airplane flights.
C. the respiratory pump is not helping blood return to the heart
D. the capillaries expand in high altitude
E. The skeletal muscle pump below the knees is not helping blood return to the heart.
E. The skeletal muscle pump below the knees is not helping blood return to the heart.
What structure does the hepatic portal vein carry toward?
A. liver
B. digestive tract
C. kidneys
D. gall bladder
A. liver
Which of the following is the largest artery of the systemic circuit?
A. aorta
B. vena cava
C. femoral artery
D. carotid artery
E. pulmonary artery
A. aorta
Which circuit contains the greatest amount of blood?
A. systemic circuit
B. pulmonary circuit
C. hepatic portal circuit
D. coronary circuit
A. systemic circuit
Normal blood pressure is 120/80. What is the top number called and what is happening in the heart?
A. systolic pressure; ejection of blood from heart
B. diastolic pressure; ejection of blood from the heart
C. systolic pressure: ventricles are relaxing
D. diastolic pressure; ventricles are relaxing
E. diastolic pressure; atria are contracting, ventricles are relaxing
A. systolic pressure; ejection of blood from heart
Identify the structure that supplies the cardiac muscle of the heart with blood.
A. coronary veins
B. pulmonary artery
C. coronary artery
D. semilunar valve
C. coronary artery
What is the considered the pacemaker of the heart?
A. medulla oblongata
B. the sinoatrial node
C. the atrioventricular node
D. Purkinje fibers
E. atrioventricular bundle
B. the sinoatrial node
In the pulmonary circuit, veins carry oxygen-____blood and in the systemic circuit, veins carry oxygen-____ blood.
A. rich; rich
B. poor; poor
C. rich; poor
D. poor; rich
C. rich; poor
A hospital lab tech injects a dye into a vein in your right arm. What is the first chamber of the heart that the dye will reach?
A. right atrium
B. left atrium
C. right ventricle
D. left ventricle
E. aorta
A. right atrium
What is the function of valves in the veins?
A. increase the rate of blood flow
B. prevent the backward flow of blood
C. regulate blood pressure
D. oxygenate the blood
E. remove debris from the blood
B. prevent the backward flow of blood
Which of the following blood vessels are small, thin, and pours enough to exchange substances at the tissue level of organization?
A. arterioles
B. capillaries
C. venules
D. small arteries
E. veins
B. capillaries
What is the name of the thick, membranous sac that surrounds and protects the heart?
A. mesothelium
B. endothelium
C. pericardium
D. myocardium
E. epicardium
C. pericardium
If fluid is leaving a capillary and entering the tissue, which of the following statements is true?
A. red blood cells are able to leave the capillary
B. plasma proteins are able to leave the capillary
C. blood pressure is higher than osmotic pressure
D. this is the venous end of the capillary
E. the net pressure is in.
C. blood pressure is higher than osmotic pressure
