Kopieren und bearbeiten

Topic 20 - Cardiovascular Physiology

Beschreibung

Physiology Quiz am Topic 20 - Cardiovascular Physiology, erstellt von Felicity B am 11/10/2017.
Felicity B
Quiz von Felicity B, aktualisiert more than 1 year ago
Felicity B
Erstellt von Felicity B vor etwa 7 Jahre
128
0
0

Zusammenfassung der Ressource

Frage 1

Frage
A blood vessel that takes blood away from the heart is called a/an
Antworten
  • Artery
  • Vein
  • Capillary
  • Ventricle

Frage 2

Frage
The heart chamber that pumps oxygen depleted blood to the lungs is the
Antworten
  • Right atrium
  • Right ventricle
  • Left atrium
  • Left ventricle

Frage 3

Frage
The systemic circulation
Antworten
  • Begins with oxygen rich blood entering the aorta
  • Supplies blood to all tissues of the body
  • Ends with oxygen depleted blood entering the right atrium
  • All of the above

Frage 4

Frage
Cardiac muscle cells are electrically connected via
Antworten
  • Desmosomes
  • Gap junctions
  • Striations
  • Motor units

Frage 5

Frage
TRUE or FALSE The series of events that create an Action Potential in a neuron are exactly the same as those that create and Action Potential in a cardiac muscle cell
Antworten
  • True
  • False

Frage 6

Frage
TRUE or FALSE The normally functioning cardiac muscle cell always completely relaxes prior to contracting again due to calcium influx that lengthens the refractory period
Antworten
  • True
  • False

Frage 7

Frage
TRUE or FALSE All cardiac muscle cells can spontaneously generate action potentials.
Antworten
  • True
  • False

Frage 8

Frage
In myocardial autorhythmic cells (pacemaker cells), when threshold is reached the action potential fires because
Antworten
  • Voltage gated sodium channels open and sodium rushes into the cell
  • Voltage gated calcium channels open and calcium rushes into the cell
  • Voltage gated potassium channels open and potassium rushes out of the cell
  • Increased leaky channels open and there is net sodium influx

Frage 9

Frage
In pacemaker cells, decreased permeability to calcium will
Antworten
  • Increase heart rate
  • Decrease heart rate
  • Have no effect on heart rate
  • Increase force of muscle contraction

Frage 10

Frage
Parasympathetic nervous stimulation onto pacemaker cells results in
Antworten
  • Increased heart rate
  • Decreased heart rate
  • No change in heart rate
  • Increased force of muscle contraction

Frage 11

Frage
TRUE or FALSE Once pacemaker cells have fired an action potential, this depolarisation spreads throughout the rest of the cardiac muscle cells via the gap junctions
Antworten
  • True
  • False

Frage 12

Frage
1. In a normally functioning heart the pacemaker cells are in the
Antworten
  • Sinoatrial (SA) node
  • Atrioventricular (AV) node
  • Autonomic nerves
  • Purkinje fibres

Frage 13

Frage
TRUE or FALSE In a normal cardiac cycle, the ventricles contract first, followed by the atria
Antworten
  • True
  • False

Frage 14

Frage
In an ECG reading, the T wave represents
Antworten
  • Depolarisation of the atria
  • Depolarisation of the ventricles
  • Repolarisation of the ventricles
  • Force of contraction

Frage 15

Frage
1. The relaxation phase of the cardiac cycle is called
Antworten
  • Diastole
  • Systole
  • Depolarisation
  • Isovolumic ventricular contraction

Frage 16

Frage
During the cardiac cycle the phase when the ventricles are contracting and blood is being ejected into the arteries is called
Antworten
  • Diastole
  • Systole
  • Depolarisation
  • Isovolumic ventricular contraction

Frage 17

Frage
When the atrioventricular valves are open
Antworten
  • Blood is flowing from the ventricles into the atria
  • Blood is flowing from the atria into the ventricles
  • Blood is being ejected from ventricles into arteries
  • Blood is being ejected from atria into veins

Frage 18

Frage
In order for the semilunar valves to be shut
Antworten
  • The pressure in the ventricles must exceed the pressure in the arteries
  • The pressure in the arteries must exceed the pressure in the ventricles
  • The atrioventricular valves must also be shut
  • The atrioventricular valves must also be open

Frage 19

Frage
When pressure in the atrium exceeds pressure in the ventricle, this will cause
Antworten
  • The AV valve to close
  • The AV valve to open
  • The semilunar valve to open
  • The semilunar valve to close

Frage 20

Frage
The volume of blood in the ventricle at the end of diastole is known as
Antworten
  • The end diastolic volume (EDV)
  • The end systolic volume (ESV)
  • The stroke volume (SV)
  • The isovolumic volume

Frage 21

Frage
TRUE or FALSE During each cardiac cycle, the ventricle ejects the full volume of blood that it contains so there is no blood left in the ventricle at the end of systole
Antworten
  • True
  • False

Frage 22

Frage
Average stroke volume (SV) of a person at rest is approximately
Antworten
  • 135 mL
  • 65 mL
  • 70 mL
  • 100 mL

Frage 23

Frage
Cardiac Output is a measure of the volume of blood pumped by one ventricle in a given period of time. It is equal to
Antworten
  • Heart rate X end diastolic volume (EDV)
  • Heart rate X stroke volume (SV)
  • Heart rate X systolic blood pressure
  • Heart rate X total peripheral resistance

Frage 24

Frage
TRUE or FALSE Average resting heart rate is about 70 beats per minute due to tonic input from the sympathetic nervous system that keeps the heart rate lower than that which is set by the pacemaker cells
Antworten
  • True
  • False

Frage 25

Frage
If force of ventricular contraction is increased, what happens to stroke volume
Antworten
  • Decreases
  • Increases
  • Stays same
  • It lowers heart rate

Frage 26

Frage
According to the Frank-Starling law, stroke volume (SV) increases as end diastolic volume (EDV) increases due to
Antworten
  • Increased sympathetic stimulation of the heart causing increased contraction of ventricles
  • Increased stretch on myocardial cells due to increased EDV, resulting in increased contraction force
  • Increased EDV causes increased heart rate and hence increased SV
  • Venous return decreases with increased EDV so SV must be increased to compensate

Frage 27

Frage
What is venous return?
Antworten
  • The amount of blood ejected from a ventricle in one cardiac cycle
  • The amount of blood that is pumped into the veins from the atria in one cardiac cycle
  • The amount of blood that enters the heart from the veins each cardiac cycle
  • The amount of blood that enters the systemic circulation each cardiac cycle

Frage 28

Frage
Which factors influence venous return?
Antworten
  • The skeletal muscle pump
  • The respiratory pump
  • Sympathetic innervation of veins
  • All of the above

Frage 29

Frage
TRUE or FALSE When sympathetic neurons fire onto the heart, both heart rate and force of contraction are increased
Antworten
  • True
  • False
Zusammenfassung anzeigen Zusammenfassung ausblenden

Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.

ähnlicher Inhalt

Epithelial tissue
Morgan Morgan
The Circulatory System
Johnny Hammer
The Heart
annalieharrison
Renal System A&P
Kirsty Jayne Buckley
Physiology / Intro psychology
Molly Macgregor
Introduction to Therapeutic Physical Agents
natalia m zameri
Malignancies
Mark George
The cardiovascular system
JakeHull8
BRS Flashcards Cardiovascular Physiology
tiwariashley
Anatomy and Physiology
Emma Purling
Lecture Exam 2: Chapter 15: Cardiovascular System
Kyla S
Bibliothek durchsuchen