Question 1

An electrocardiogram (ECG) shows extra P waves. Determine and discuss the part of the conduction pathway that is not working.

Accepted Answer

Extra P waves indicate that some action

Question 2

Which wave on the electrocardiogram (ECG) corresponds with the ventricular filling phase of the cardiac cycle?

Accepted Answer

A)  T wave 
B)  S wave 
C)  P wave 
D)  S -T segment 
A)  T wave 
B)  S wave 
C)  P wave 
D)  S -T segment

Question 3

Predict the effects of hypocalcemia (low blood calcium ion levels) on the strength and length of contraction in a contractile cell.

Accepted Answer

Calcium ions normally enter the contract

Question 4

What best describes the Frank -Starling law?

Accepted Answer

A)  The Frank -Starling law states that the slower the heart rate, the greater the cardiac output. 
B)  The Frank -Starling law states that the greater the stroke volume, the greater the heart rate. 
C)  The Frank -Starling law states that the more the ventricular muscle cells are stretched, the more forcefully they contract. 
D)  The Frank -Starling law states that the greater the volume of blood discharged from the heart, the greater the pressure required to discharge the blood. 
A)  The Frank -Starling law states that the slower the heart rate, the greater the cardiac output. 
B)  The Frank -Starling law states that the greater the stroke volume, the greater the heart rate. 
C)  The Frank -Starling law states that the more the ventricular muscle cells are stretched, the more forcefully they contract. 
D)  The Frank -Starling law states that the greater the volume of blood discharged from the heart, the greater the pressure required to discharge the blood.

Question 5

Summarize the two phases of the cardiac cycle during which all four heart valves are briefly closed.

Accepted Answer

The first phase, known as the isovolumet

Question 6

Which of the following does NOT return blood to the right atrium of the heart?

Accepted Answer

A)  superior vena cava 
B)  inferior vena cava 
C)  coronary sinus 
D)  pulmonary vein 
A)  superior vena cava 
B)  inferior vena cava 
C)  coronary sinus 
D)  pulmonary vein

Question 7

An insufficient mitral valve (bicuspid valve, or left atrioventricular valve) would allow the backflow of blood into the:

Accepted Answer

A)  left ventricle. 
B)  aorta. 
C)  left atrium. 
D)  right atrium. 
A)  left ventricle. 
B)  aorta. 
C)  left atrium. 
D)  right atrium.

Question 8

High pressured blood in the ventricles:

Accepted Answer

A)  forces both the AV valves and semilunar valves shut. 
B)  forces both the AV valves and semilunar valves open. 
C)  forces the semilunar valves open. 
D)  forces the AV valves open. 
A)  forces both the AV valves and semilunar valves shut. 
B)  forces both the AV valves and semilunar valves open. 
C)  forces the semilunar valves open. 
D)  forces the AV valves open.

Question 9

Which hormone decreases cardiac output by decreasing blood volume and preload?

Accepted Answer

A)  norepinephrine 
B)  antidiuretic hormone 
C)  aldosterone 
D)  atrial natriuretic peptide 
A)  norepinephrine 
B)  antidiuretic hormone 
C)  aldosterone 
D)  atrial natriuretic peptide

Question 10

Autorhythmicity is the responsibility of:

Accepted Answer

A)  cardiac pacemaker cells. 
B)  cardiac muscle cells. 
C)  skeletal muscle cells. 
D)  contractile cells. 
A)  cardiac pacemaker cells. 
B)  cardiac muscle cells. 
C)  skeletal muscle cells. 
D)  contractile cells.

Question 11

The heart is situated in the middle of the thoracic cavity in a region known as the:

Accepted Answer

A)  dorsal cavity. 
B)  cardiac notch. 
C)  mediastinum. 
D)  pleural cavity. 
A)  dorsal cavity. 
B)  cardiac notch. 
C)  mediastinum. 
D)  pleural cavity.

Question 12

Match the following structures with the internal heart anatomy.
  
-Identify the right atrium.

Accepted Answer

The answer of Match the following structures with the internal...

Question 13

What muscles, present in the ventricles, anchor by tendon -like chords called chordae tendineae?

Accepted Answer

A)  papillary muscles 
B)  pectinate muscles 
C)  trabeculae carneae 
D)  ligamentum arteriosum 
A)  papillary muscles 
B)  pectinate muscles 
C)  trabeculae carneae 
D)  ligamentum arteriosum

Question 14

Heart rate can be determined by measuring the time between two successive R waves, known as the R -R interval.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following vessels carries oxygenated blood?

Accepted Answer

A)  pulmonary artery 
B)  pulmonary vein 
C)  pulmonary trunk 
D)  superior vena cava 
A)  pulmonary artery 
B)  pulmonary vein 
C)  pulmonary trunk 
D)  superior vena cava

Question 16

What wave on the electrocardiogram (ECG) occurs during the ventricular ejection phase of the cardiac cycle?

Accepted Answer

A)  P wave 
B)  R wave 
C)  Q wave 
D)  T wave 
A)  P wave 
B)  R wave 
C)  Q wave 
D)  T wave

Question 17

Which cranial nerves have a negative chronotropic effect on heart rate?

Accepted Answer

A)  hypoglossal nerves (CN XII) 
B)  trochlear nerves (CN IV) 
C)  vagus nerves (CN X) 
D)  glossopharyngeal nerves (CN IX) 
A)  hypoglossal nerves (CN XII) 
B)  trochlear nerves (CN IV) 
C)  vagus nerves (CN X) 
D)  glossopharyngeal nerves (CN IX)

Question 18

What is NOT part of the cardiac conduction system?

Accepted Answer

A)  atrioventricular (AV) bundle 
B)  sinoatrial sinoatrial (S
A)  node 
C)  atrioventricular (AV) valve 
D)  atrioventricular (AV) node 
A)  atrioventricular (AV) bundle 
B)  sinoatrial sinoatrial (S
A)  node 
C)  atrioventricular (AV) valve 
D)  atrioventricular (AV) node

Question 19

A damaged atrioventricular (AV) bundle or atrioventricular (AV) node will primarily affect the length of the:

Accepted Answer

A)  T wave. 
B)  Q -T interval. 
C)  P -R interval. 
D)  P wave. 
A)  T wave. 
B)  Q -T interval. 
C)  P -R interval. 
D)  P wave.

Question 20

Describe the coronary circulation.

Accepted Answer

The heart is supplied and drained by a s

Exam 17: The Cardiovascular System I: the Heart

An electrocardiogram (ECG) shows extra P waves. Determine and discuss the part of the conduction pathway that is not working.

Which wave on the electrocardiogram (ECG) corresponds with the ventricular filling phase of the cardiac cycle?

Predict the effects of hypocalcemia (low blood calcium ion levels) on the strength and length of contraction in a contractile cell.

What best describes the Frank -Starling law?

Summarize the two phases of the cardiac cycle during which all four heart valves are briefly closed.

Which of the following does NOT return blood to the right atrium of the heart?

An insufficient mitral valve (bicuspid valve, or left atrioventricular valve) would allow the backflow of blood into the:

High pressured blood in the ventricles:

Which hormone decreases cardiac output by decreasing blood volume and preload?

Autorhythmicity is the responsibility of:

The heart is situated in the middle of the thoracic cavity in a region known as the:

Match the following structures with the internal heart anatomy. -Identify the right atrium.

What muscles, present in the ventricles, anchor by tendon -like chords called chordae tendineae?

Heart rate can be determined by measuring the time between two successive R waves, known as the R -R interval.

Which of the following vessels carries oxygenated blood?

What wave on the electrocardiogram (ECG) occurs during the ventricular ejection phase of the cardiac cycle?

Which cranial nerves have a negative chronotropic effect on heart rate?

What is NOT part of the cardiac conduction system?

A damaged atrioventricular (AV) bundle or atrioventricular (AV) node will primarily affect the length of the:

Describe the coronary circulation.

Introduction to Anatomy Physiology

The Chemistry of Life

The Cell

Histology

The Integumentary System

Bones and Bone Tissue

The Skeletal System

Articulations

The Muscular System

Muscle Tissue Physiology

Introduction to the Nervous System Nervous Tissue

The Central Nervous System

The Peripheral Nervous System

The Autonomic Nervous System Homeostasis

The Special Senses

The Endocrine System

The Cardiovascular System Ii: Blood Vessels

Blood

The Lymphatic System Immunity

The Respiratory System

The Digestive System

Metabolism Nutrition

The Urinary System

Fluid, Electrolyte Acid-Base Homeostasis

The Reproductive System

Development Heredity

Filters

What best describes the Frank ^-Starling law?

What muscles, present in the ventricles, anchor by tendon ^-like chords called chordae tendineae?

Heart rate can be determined by measuring the time between two successive R waves, known as the R ^-R interval.