問題一覧
1
Which of the Events Below Would NOT Increase the Pressure of Blood Against the Blood-Vessel Walls?
A decrease in blood viscosity
2
A Resting Heart Rate That Exceeds 100 Beats per Minute Is Called __________.
tachycardia
3
Which of the following is not part of the cardiovascular system?
Lung
4
The Outermost Membrane That Forms a Loose-Fitting Sac Around the Heart Is the __________.
fibrous pericardium
5
In an ECG Pattern, What Event Is Represented by the T Wave?
Repolarization of ventricular muscle fibers
6
The _______ Circuit Sends Oxygen-Rich Blood From the Heart to All Cells of the Body, Removes Carbon Dioxide and Other Wastes, and Returns Blood to the Heart.
systemic
7
What Is the Function of the Pulmonary Circuit?
Sends oxygen-poor blood to the lungs
8
Which Type of Blood Vessel Serves as a Blood Reservoir?
Veins
9
During What Phase of the Cardiac Cycle Is Blood Pressure in the Systemic Arteries the Greatest?
During ventricular systole
10
Drinking Too Much Water Would __________ Blood Viscosity and Subsequently __________ Peripheral Resistance.
decrease; decrease
11
What Is the Function of Plasma Proteins in Capillary Exchange?
To maintain the osmotic pressure of the blood
12
Which of the Following Structures Does Not Require Stimulation From Nerve Fibers or Other Agents?
Sinoatrial node
13
During Long Flights, It Is Recommended That You Move Your Foot up and Down Periodically, Forcing Contractions of the Muscles in the Calf. How Would This Help With Circulation?
Contraction of the leg muscles squeezes leg veins, which function as a pumping mechanism to return deoxygenated blood to the heart.
14
The Volume of Blood Discharged From the Ventricle With Each Heartbeat Is Called _________.
stroke volume
15
The Density of Capillaries Within a Tissue Is Proportional to the Tissue's __________.
rate of metabolism
16
An Abnormally Slow Heart Rate (Fewer Than 60 Beats per Minute) Is Called _______________.
Bradycardia
17
What Part of the ECG Pattern Is Due to Depolarization of the Ventricles?
QRS complex
18
In Normal Circulation, Blood Flow Usually Follows What Pattern of Vessels?
Artery, arteriole, capillary, venule, vein
19
Which of the Following Would Cause a Decrease in Cardiac Output?
An increase in parasympathetic stimulation
20
In What Type of Blood Vessel Is the Tunica Media the Thickest?
Arteries
21
How Does Heart Rate Affect Blood Pressure?
Elevated heart rate increases cardiac output, therefore raising blood pressure.
22
If the Aortic Baroreceptor Senses an Increased Stretch of the Aorta, How Will the Nervous System Respond?
Parasympathetic signals will be sent to decrease heart rate.
23
Impulses Carried to the Heart by Means of Fibers That Secrete Acetylcholine Are __________ Impulses and Cause the Heart Rate to __________.
parasympathetic; decrease
24
What Is the Complete Set of Contraction and Relaxation Events That Constitutes One Heartbeat Called?
Cardiac cycle
25
Which Blood Vessel Type Has the Lowest Blood Pressure?
Veins
26
What Happens to the Valves When the Ventricular Walls Relax?
Bicuspid and tricuspid valves open.
27
Which of the Following Represents the Correct Sequence of Structures Through Which Blood Moves From the Venae Cavae to the Lungs?
Right atrium, tricuspid valve, right ventricle, pulmonary valve
28
What Does the Frank-Starling Law of the Heart State?
The greater the length of myocardial fibers, the greater the force with which they contract
29
In an ECG Pattern, What Event Is Represented by the P Wave?
Depolarization of atrial muscle fibers
30
What Is the Correct Sequence of Structures of the Cardiac Conduction System?
SA node, AV node, AV bundle, Purkinje fibers