Question 1

Why is the myocardium of the left ventricle thicker than the myocardium of the right ventricle?

Accepted Answer

The left ventricle muscular wall is thic

Question 2

Identify the muscular ridges that are found on the anterior wall of the right atrium and extend into the auricles.

Accepted Answer

A) Pectinate muscles 
B) Trabeculae carneae 
C) Coronary sulci 
D) Papillary muscles 
E) Chordae tendinae 
A) Pectinate muscles 
B) Trabeculae carneae 
C) Coronary sulci 
D) Papillary muscles 
E) Chordae tendinae

Question 3

Describe what is happening during the phase of the cardiac action potential labeled 2 in the diagram.

Accepted Answer

Phase 2 is the plateau phase which occur

Question 4

Which of the following terms identifies the anatomical region found between the lungs that extends from the sternum to the vertebral column and from the first rib to the diaphragm?

Accepted Answer

A) Epicardium 
B) Abdominal cavity 
C) Pericardium 
D) Mediastinum 
E) Thoracic cavity 
A) Epicardium 
B) Abdominal cavity 
C) Pericardium 
D) Mediastinum 
E) Thoracic cavity

Question 5

Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate of about 100 beats per minute?

Accepted Answer

A) Cardiac accelerator nerves 
B) Atrioventricular node 
C) Cardiovascular center 
D) Sinoatrial node 
E) Bundle of His 
A) Cardiac accelerator nerves 
B) Atrioventricular node 
C) Cardiovascular center 
D) Sinoatrial node 
E) Bundle of His

Question 6

Which of the labeled diagrams shows coarctation of the aorta?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 7

Explain the difference in the functions of low-density lipoproteins and high-density lipoproteins and explain why one is called "good" cholesterol and the other is called "bad" cholesterol.

Accepted Answer

Low-density lipoproteins (LDL)transport

Question 8

Contraction of the atria of the heart leads to blood moving directly

Accepted Answer

A) into auricles. 
B) into arteries. 
C) into veins 
D) through atrioventricular valves 
E) through semilunar valves. 
A) into auricles. 
B) into arteries. 
C) into veins 
D) through atrioventricular valves 
E) through semilunar valves.

Question 9

Which structure in the figure is labeled A?

Accepted Answer

A) left common carotid artery 
B) left subclavian artery 
C) left pulmonary vein 
D) pulmonary trunk 
E) superior vena cava 
A) left common carotid artery 
B) left subclavian artery 
C) left pulmonary vein 
D) pulmonary trunk 
E) superior vena cava

Question 10

Which of the following would lead to a decreased heart rate?

Accepted Answer

A) Increased norepinephrine release 
B) Increased thyroid hormone release 
C) Increased potassium levels in plasma 
D) Increased calcium levels in plasma 
E) Increased sympathetic stimulation 
A) Increased norepinephrine release 
B) Increased thyroid hormone release 
C) Increased potassium levels in plasma 
D) Increased calcium levels in plasma 
E) Increased sympathetic stimulation

Question 11

In the diagram,which labeled structures are atrioventricular valves?

Accepted Answer

A) A and B 
B) C and D 
C) A and C 
D) B and D 
E) A,B,C and D 
A) A and B 
B) C and D 
C) A and C 
D) B and D 
E) A,B,C and D

Question 12

Cardiac output is the volume of blood ejected from the [dropdown 1] ventricle into the [dropdown 2] each minute.
Dropdown 1 choices:
left
right
left or right
both left and right
Dropdown 2 choices:
aorta
pulmonary trunk
aorta or pulmonary trunk

Accepted Answer

1.left or

Question 13

The apex of the heart is normally pointed

Accepted Answer

A) at the midline. 
B) to the left of the midline. 
C) to the right of the midline. 
D) is different for males and females 
E) posteriorly. 
A) at the midline. 
B) to the left of the midline. 
C) to the right of the midline. 
D) is different for males and females 
E) posteriorly.

Question 14

Identify the groove found on the surface of the heart that marks the boundary between the right and left ventricles.

Accepted Answer

A) Coronary sulcus 
B) Anterior interventricular sulcus 
C) Posterior interventricular sulcus 
D) Coronary sinus 
E) Anterior intraventricular sulcus 
A) Coronary sulcus 
B) Anterior interventricular sulcus 
C) Posterior interventricular sulcus 
D) Coronary sinus 
E) Anterior intraventricular sulcus

Question 15

Two hormones that increase heart rate are [dropdown 1] and [dropdown 2].
Dropdown 1 Choices:
adrenocorticotropic hormone
growth hormone
testosterone
thyroid hormone 
Dropdown 2 Choices:
acetylcholine
epinephrine
insulin
melatonin

Accepted Answer

1.thyroid

Question 16

Which structure in the figure is labeled B?

Accepted Answer

A) left common carotid artery 
B) left subclavian artery 
C) left pulmonary vein 
D) superior vena cava 
E) brachiocephalic trunk 
A) left common carotid artery 
B) left subclavian artery 
C) left pulmonary vein 
D) superior vena cava 
E) brachiocephalic trunk

Question 17

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?

Accepted Answer

A) right atrium 
B) left atrium 
C) right ventricle 
D) left ventricle 
E) right auricle 
A) right atrium 
B) left atrium 
C) right ventricle 
D) left ventricle 
E) right auricle

Question 18

Stimulation of which nerve reduces heart rate?

Accepted Answer

A) Cardiac accelerator nerve 
B) Hypoglossal nerve 
C) Spinal accessory 
D) Vagus nerve 
E) Phrenic nerve 
A) Cardiac accelerator nerve 
B) Hypoglossal nerve 
C) Spinal accessory 
D) Vagus nerve 
E) Phrenic nerve

Question 19

Pectinate muscles extend from the atrial internal wall into the pouch-like structures that increase the total filling capacity of the atrium.These structure are the

Accepted Answer

A) ventricles 
B) coronary sulci 
C) fossa ovalis 
D) interatrial septa 
E) auricles 
A) ventricles 
B) coronary sulci 
C) fossa ovalis 
D) interatrial septa 
E) auricles

Question 20

Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?

Accepted Answer

A) Bundle of His,Purkinje fibers,Atrioventricular (AV)node 
B) Sinoatrial (S
A) node,Purkinje fibers,AV node,Bundle of His 
C) Purkinje fibers,AV node,SA node,Bundle of His 
D) SA node,AV node,Bundle of His,Purkinje fibers 
E) Bundle of His,SA node,AV node,Purkinje fibers 
A) Bundle of His,Purkinje fibers,Atrioventricular (AV)node 
B) Sinoatrial (S
A) node,Purkinje fibers,AV node,Bundle of His 
C) Purkinje fibers,AV node,SA node,Bundle of His 
D) SA node,AV node,Bundle of His,Purkinje fibers 
E) Bundle of His,SA node,AV node,Purkinje fibers

Exam 20: The Cardiovascular System: the Heart

Why is the myocardium of the left ventricle thicker than the myocardium of the right ventricle?

Identify the muscular ridges that are found on the anterior wall of the right atrium and extend into the auricles.

Describe what is happening during the phase of the cardiac action potential labeled 2 in the diagram.

Which of the following terms identifies the anatomical region found between the lungs that extends from the sternum to the vertebral column and from the first rib to the diaphragm?

Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate of about 100 beats per minute?

Which of the labeled diagrams shows coarctation of the aorta?

Explain the difference in the functions of low-density lipoproteins and high-density lipoproteins and explain why one is called "good" cholesterol and the other is called "bad" cholesterol.

Contraction of the atria of the heart leads to blood moving directly

Which structure in the figure is labeled A?

Which of the following would lead to a decreased heart rate?

In the diagram,which labeled structures are atrioventricular valves?

Cardiac output is the volume of blood ejected from the [dropdown 1] ventricle into the [dropdown 2] each minute. Dropdown 1 choices: left right left or right both left and right Dropdown 2 choices: aorta pulmonary trunk aorta or pulmonary trunk

The apex of the heart is normally pointed

Identify the groove found on the surface of the heart that marks the boundary between the right and left ventricles.

Two hormones that increase heart rate are [dropdown 1] and [dropdown 2]. Dropdown 1 Choices: adrenocorticotropic hormone growth hormone testosterone thyroid hormone Dropdown 2 Choices: acetylcholine epinephrine insulin melatonin

Which structure in the figure is labeled B?

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?

Stimulation of which nerve reduces heart rate?

Pectinate muscles extend from the atrial internal wall into the pouch-like structures that increase the total filling capacity of the atrium.These structure are the

Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?

An Introduction to the Human Body

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

The Skeletal System: Bone Tissue

The Skeletal System: the Axial Skeleton

The Skeletal System: The Appendicular Skeleton

Joints

Muscular Tissue

The Muscular System

Nervous Tissue

The Spinal Cord and Spinal Nerves

The Brain and Cranial Nerves

The Autonomic Nervous System

Sensory, Motor, and Integrative Systems

The Special Senses

The Endocrine System

The Cardiovascular System: the Blood

The Cardiovascular System: Blood Vessels and Hemodynamics

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Nutrition

The Urinary System

Fluid, Electrolyte, and Acidbase Homeostasis

The Reproductive Systems

Development and Inheritance

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