Chapter 1 Flashcards
The apex of the heart is formed by the
Tip of the left ventricle
The left atrium receives blood from the
Pulmonary veins
True or false
Stimulation of the beta adrenergic receptor cells sites will result in peripheral vasocontriction
False
Blood pressure is the result of cardiac output and peripheral vascular resistance
True or falso
True
The anterior surface of the heart consists primarily of the _____.
right ventricle
Blood pressure is determined by _____ multiplied by _____.
cardiac output; peripheral vascular resistance
The right atrium receives venous blood from the head, neck, and thorax via the _____, from the remainder of the body via the _____, and from the heart via the _____.
uperior vena cava; inferior vena cava; coronary sinus
The heart is divided into _____ chambers but functions as a _____-sided pump.
four; two
Stimulation of alpha-adrenergic receptors results in _____.
peripheral vasoconstriction
Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
Right
Which side of the heart is a high-pressure system that pumps arterial blood to the systemic circulation?
Left
The thick, muscular middle layer of the heart wall that contains the atrial and ventricular muscle fibers necessary for contraction is the _____.
myocardium
Blood flows from the right atrium through the _____ valve into the right ventricle.
tricuspid
Rapid ejection of blood from the ventricular chambers of the heart occurs because the _____ and _____ valves open.
pulmonic; aortic
The base of the heart is found at approximately the level of the _____ rib(s).
second
Which of the following are semilunar valves?
Aortic and pulmonic
Blood leaves the left ventricle through the _____ valve to the aorta and its branches and is distributed throughout the body.
aortic
Blood flows from the left atrium through the _____ valve into the left ventricle.
mitral
The right ventricle expels blood through the _____ valve into the pulmonary trunk.
pulmonic
The primary neurotransmitters of the sympathetic division of the autonomic nervous system are _____.
norepinephrine and epinephrine
Complete occlusion of the _____ coronary artery, also referred to as the widow maker, usually results in sudden death.
left main
Stimulation of beta2 receptor sites results in _____.
relaxation of bronchial smooth muscle
Chronotropy refers to an effect on _____.
heart rate
The left main coronary artery divides into the _____ branches.
anterior descending and circumflex
The primary neurotransmitter of the parasympathetic division of the autonomic nervous system is _____.
acetylcholine
The _____ artery supplies the right atrium and ventricle with blood.
right coronary