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ANT Chpt 15 & 16

Anatomy Chapters 15 & 16

Which of the following statements describes the pericardium? It is a two-part membrane that surrounds and protects the heart.
Which blood vessel delivers deoxygenated blood from the head and neck to the heart? superior vena cava
Cardiac muscle fibers are described by all of the above
The chordae tendineae and papillary muscles of the heart help prevent the atrioventricular valves from protruding into the atria when the ventricles contract.
Which chamber of the heart has the thickest layer of myocardium? left ventricle
The normal "pacemaker" of the heart is the sinoatrial (SA) node
In normal heart action the two atria contract together, and then the two ventricles contract together
Heart sounds are produced by closure of the heart valves
Heart rate and strength of contraction are controlled by the cardiovascular center, which is located in the medulla
The portion of the ECG that corresponds to atrial depolarization is the P wave
The opening of the semilunar valves is due to the pressure in the ventricles exceeding the prssure in the aorta and pulmonary trunk
The blood supply to the myocardium is the coronary circulation
The Frank-Starling law of the heart is important in maintaining equal blood output from both ventricles
Which of the following sequences best represents the parthway of an action potential through the heart's conduction system? d. 1, 4, 3, 5, 2
Which of the following is NOT true concerning ventricular filling during he cardiac cycle? The semilunar valves are open
Cardiac output equals stroke volume (SV) X heart rate (HR)
Which of the following statements is NOT true? A drop in blood pressure would cause baroreceptors to stimulate the cardiovascular center to increase parasympathetic impulses
Sensory receptors that monitor changes in the blood pressure to the brain are baroreceptors in the carotid arteries
The blood vessels that allow the exchange of nutrients, wastes, oxygen, and carbon dioxide between the blood and tissue are the arteries
Autoregulation is an ability of a tissue to adjust its blood flow
Blood flows through the blood vessels because of the establishment of a pressure gradient
Which of the following represents pulmonary circulation as the blood flows from the right ventricle? trunk --> arteries --> capillaries --> veins
Supplying additional fat tissue with blood may raise blood pressrue because of an increase in total vessel length
Filtration of substances out of capillaries occurs when the capillary blood pressure is ___ and blood colloid osmotic pressure is ___. high, low
Which of the following pairs of hormones have opposite effects on blood pressure? ADH, ANP
Which of the following statements about blood vessels is true? walls of arteries are generally thicker and contain more elastic tissue than walls of veins
Why is it important that blood flows slowly through the capillaries? it permits the efficient exchange of nutrients and wastes between the blood and body cells
Aldosterone affects blood pressure by increasing reabsorption of sodium ions and water kidneys
In a blood pressure reading of 110/70 70 represents the pressure of the blood against the arteries during ventricular relaxation
Which of the following statements is NOT true? regulation of blood vessel diameter originates from the hypothalamus
Venous return to the heart is enhanced by all of the following EXCEPT vasodilation
valve between the left atrium and left ventricle biscuspid (mitral) valve
valve between the right atrium and right ventricle tricuspid valve
chamber that pumps blood to the lungs right ventricle
chamber that pumps blood into the aorta left ventricle
chamber that receives oxygenated blood from lungs left atrium
chamber that receives deoxygenated blood from body right atrium
valve between the left ventricle and aorta aortic valve
valve between right ventricle and pulmonary trunk pulmonary vavle
wall between lower heart chambers interventricular septum
sac-like structure located on anterior surface of atrium auricle
wall between upper heart chambers interatrial septum
may cause a heart murmur valve disorder
heart compression cardiac tamponande
inflammation of heart covering pericarditis
heart chamber contraction systole
chest pain from ischemia angina pectoris
heart attack myocardial infarction
heart chamber relaxation diastole
Created by: dtgs2010



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