1.
Arteries flow _____ the heart.
Correct Answer
B. Away from
Explanation
think of it this way. not in terms of red/blue or oxygenated/deoxygenated.
arteries flow AWAY from the heart. Thats why the pulmonary artery is DEOXYGINATED because its flowing AWAY from the heart to the lungs.
2.
Veins flow _____ the heart.
Correct Answer
A. Towards
Explanation
think of it this way. not in terms of red/blue or oxygenated/deoxygenated.
veins flow TOWARDS the heart. Thats why the pulmonary vein is OXYGINATED because its flowing TOWARDS the heart to the lungs.
3.
what is A?
Correct Answer
C. Artery
Explanation
An artery is a blood vessel that carries oxygenated blood away from the heart to the rest of the body. It is composed of several layers, including the tunica interna (endothelial cells), tunica media (smooth muscle), and tunica externa (loose fibrous connective tissue). The tunica interna is the innermost layer of the artery and is made up of endothelial cells that provide a smooth lining for blood flow. Therefore, the correct answer is artery.
4.
what is B?
Correct Answer
E. Vein
Explanation
Vein is the correct answer because it is the only option listed that is a type of blood vessel. The other options, such as tunica interna, valve, artery, elastin, tunica media, serosa, and tunica externa, are all components or structures associated with blood vessels, but they do not specifically refer to a type of blood vessel like a vein does.
5.
what is C?
Correct Answer
A. Tunica interna (endothelial cells)
Explanation
The correct answer is tunica interna (endothelial cells). The tunica interna is the innermost layer of blood vessels, composed of endothelial cells. These cells provide a smooth surface for blood flow and help regulate the exchange of substances between the blood and surrounding tissues. It also plays a role in maintaining vascular tone and preventing blood clot formation.
6.
what is D?
Correct Answer
D. Elastin
Explanation
Elastin is the correct answer because it is a protein found in the walls of blood vessels, particularly in the tunica media layer. Elastin provides elasticity to the blood vessels, allowing them to stretch and recoil as blood flows through them. This elasticity helps maintain proper blood pressure and prevents damage to the vessels.
7.
what is E?
Correct Answer
F. Tunica media (smooth muscle)
Explanation
The correct answer is tunica media (smooth muscle). In the walls of blood vessels, the tunica media is the middle layer that contains smooth muscle cells. These smooth muscle cells are responsible for regulating the diameter of the blood vessel, which in turn controls blood flow and blood pressure. The tunica media is thicker in arteries compared to veins, as arteries need to withstand higher pressure.
8.
what is F?
Correct Answer
H. Tunica externa (loose fibrous connective tissue)
Explanation
The correct answer is tunica externa (loose fibrous connective tissue). In the structure of blood vessels, the tunica externa is the outermost layer composed of loose fibrous connective tissue. It provides support and protection to the blood vessel, helping to maintain its shape and integrity. The tunica externa also contains blood vessels that supply nutrients to the vessel walls.
9.
what is G?
Correct Answer
B. Valve
Explanation
The correct answer is "valve". A valve is a structure that allows for one-way flow of fluid or blood. In the context of the given options, the other options such as tunica interna, artery, elastin, vein, tunica media, serosa, and tunica externa do not specifically refer to a valve. Therefore, the correct answer is "valve".
10.
what is H?
Correct Answer
G. Serosa (epithelial cells)
11.
What can you determine with ausculatation of the heart?
Correct Answer(s)
B. Rate
C. Rhythm
E. Murmurs
Explanation
Auscultation is the technical term for listening to the internal sounds of the body, usually using a stethoscope; based on the Latin verb auscultare "to listen".
Ausculataion is used to listen to ALL of the above, but ausculatation of the HEART is specifically listening for rate, rhythm and murmurs.
12.
Cyanosis is when the blood is over oxygenated.
Correct Answer
B. False
Explanation
cyan = blue
cyanosis is when the mucous membranes and other tissues are turning blue which means not enough oxygen.
"Cyanosis is defined as a bluish discoloration, especially of the skin and mucous membranes due to excessive concentration of deoxyhemoglobin in the blood."
13.
Turbulent flow through cardiac defects causes heart _______ (attacks/murmurs)
Correct Answer
murmurs
Explanation
Murmurs are abnormal heart sounds caused by turbulent flow through cardiac defects.
14.
what is A?
Correct Answer
D. SA node
Explanation
The SA node, also known as the sinoatrial node, is a small group of cells located in the right atrium of the heart. It is often referred to as the natural pacemaker of the heart because it initiates the electrical impulses that regulate the heart's rhythm. These electrical impulses cause the atria to contract and signal the AV node to continue the electrical conduction through the heart. Therefore, the SA node is responsible for setting the pace of the heart's contractions and ensuring that they occur in a coordinated manner.
15.
what is B?
Correct Answer
E. AV node
Explanation
The AV node, or atrioventricular node, is a small cluster of cells located in the lower part of the right atrium of the heart. It acts as a relay station between the atria and the ventricles, allowing for the coordinated contraction of the heart. When an electrical signal reaches the AV node, it briefly delays the signal before transmitting it to the ventricles. This delay allows for the atria to fully contract and fill the ventricles with blood before they contract. Therefore, the AV node plays a crucial role in regulating the heart's rhythm and ensuring efficient blood flow.
16.
what is C?
Correct Answer
B. AV bundle (bundle of His)
Explanation
The correct answer is AV bundle (bundle of His). The AV bundle, also known as the bundle of His, is a collection of specialized cardiac muscle fibers that conducts electrical impulses from the atrioventricular node to the ventricles. It is responsible for transmitting the electrical signals that regulate the contraction of the ventricles, allowing for coordinated pumping of blood throughout the body.
17.
what is D?
Correct Answer
C. Purkinje fibers
Explanation
The correct answer is purkinje fibers. Purkinje fibers are specialized cardiac muscle fibers that are responsible for transmitting electrical impulses throughout the ventricles of the heart, causing them to contract and pump blood. They are located in the walls of the ventricles and ensure coordinated and efficient contraction of the heart. The other options listed, such as the left/right bundle branches, AV bundle (bundle of His), SA node, and AV node, are also components of the electrical conduction system of the heart, but they do not specifically refer to the purkinje fibers.
18.
what is E?
Correct Answer
A. Left/right bundle branches
Explanation
The left/right bundle branches are responsible for conducting electrical signals through the ventricles of the heart. They are part of the electrical conduction system and play a crucial role in coordinating the contraction of the ventricles, which pumps blood to the rest of the body. The left bundle branch carries the electrical signals to the left ventricle, while the right bundle branch carries them to the right ventricle. Dysfunction or blockage in these branches can lead to various heart conditions and abnormalities in the heart's rhythm.
19.
what is phase 0?
Correct Answer
B. Rapid Na+ channels open (-85 mv), slow Ca++ channels open (-40 mv)
Explanation
In phase 0 of the cardiac action potential, the rapid Na+ channels open at a membrane potential of -85 mV, allowing a rapid influx of Na+ ions into the cell. At the same time, slow Ca++ channels open at a membrane potential of -40 mV, leading to a slower influx of Ca++ ions. This combination of ion channels opening contributes to the depolarization of the membrane and the initiation of the action potential.
20.
what is phase 1?
Correct Answer
D. Na+ channels close = NA+ flux ceases (Outward Rectifier K+ channels open transiently)
Explanation
During phase 1 of the cardiac action potential, the rapid Na+ channels open, causing a rapid influx of Na+ ions into the cell, which depolarizes the membrane. At the same time, slow Ca++ channels also open, allowing a slower influx of Ca++ ions. This combination of Na+ and Ca++ fluxes is responsible for the "Plateau Phase" and prolongs the cardiac action potential. Towards the end of phase 1, the Na+ channels close, resulting in the cessation of Na+ flux. This closure of Na+ channels also triggers the transient opening of Outward Rectifier K+ channels, which allows K+ ions to leave the cell, contributing to the repolarization of the membrane.
21.
what is phase 2?
Correct Answer
A. K+ channels open, Ca++ flux in continues ("Plateau Phase" -- responsible for prolonging the cardiac action potential, making it longer than a nerve action potential)
Explanation
During phase 2 of the cardiac action potential, K+ channels open and Ca++ flux continues. This phase is known as the "Plateau Phase" because it is responsible for prolonging the cardiac action potential and making it longer than a nerve action potential. The opening of K+ channels allows K+ ions to flow out of the cell, while the continued influx of Ca++ ions helps to maintain the depolarization of the cell membrane. This phase is crucial for the proper functioning of the heart and allows for coordinated contraction and relaxation of the cardiac muscles.
22.
what is phase 3?
Correct Answer
E. "Repolarization" Ca++ channels close, K+ flux out continues (delayed rectifier K+ channel)
Explanation
During phase 3 of the cardiac action potential, the Ca++ channels close, leading to the repolarization of the cell. At the same time, the delayed rectifier K+ channels remain open, allowing K+ ions to continue flowing out of the cell. This outward flux of K+ ions helps to restore the cell to its resting state concentrations and contributes to the repolarization of the membrane potential.
23.
what is phase 4?
Correct Answer
C. K+ channels closed, Active transport of Na+ and K+ to return to resting state concentrations. (inward rectifier K+ channels)
Explanation
During phase 4, the K+ channels are closed and there is active transport of Na+ and K+ ions to return to their resting state concentrations. This process is facilitated by inward rectifier K+ channels. This phase is important for maintaining the resting membrane potential and preparing the cardiac muscle for the next action potential.
24.
Lead II is between ____ and ____.
Correct Answer
B. Right forelimb, left hindlimb
Explanation
Lead II is a specific lead placement used in electrocardiography. It involves placing the positive electrode on the right forelimb and the negative electrode on the left hindlimb. This lead placement allows for the measurement of electrical activity between these two limbs, providing important information about the heart's electrical conduction system.
25.
Correct Answer
D. S
26.
Correct Answer
B. Q
27.
Correct Answer
A. P
28.
Correct Answer
C. R
29.
Correct Answer
E. T
30.
CO = HR x SV
HR stands for ____ ______
Correct Answer
heart rate
Explanation
HR stand for HEART RATE.
CO = HR x SV
increasing the heart rate does not increase cardiac output substantially unless stroke volume is maintained
heart rate = how often the heart contracts
31.
CO = HR x SV
SV stands for ____ ______
Correct Answer
stroke volume
Explanation
SV stands for STROKE VOLUME
CO = HR x SV
increasing the heart rate does not increase cardiac output substantially unless stroke volume is maintained
stroke volume = the amount of blood ejected with each cardiac contraction
32.
CO = HR x SV
CO stands for ____ ______
Correct Answer
cardiac output
Explanation
CO stand for CARDIAC OUTPUT.
CO = HR x SV
increasing the heart rate does not increase cardiac output substantially unless stroke volume is maintained
cardiac output - the amount of blood that leaves the heart
33.
The hepatic portal vein drains blood from the ________.
Correct Answer
E. Intestines
Explanation
The hepatic portal vein drains blood from the intestines. The hepatic portal vein is responsible for carrying nutrient-rich blood from the intestines to the liver for processing and detoxification. This allows the liver to regulate the levels of nutrients and remove any harmful substances before the blood is sent back to the heart.
34.
In the fetus blood flows from the Umbilical Vein -> Ductus Venosus --> ___________
Correct Answer
D. Caudal vena cava
Explanation
In the fetus, blood flows from the Umbilical Vein to the Ductus Venosus, which then connects to the caudal vena cava. This allows oxygenated blood from the placenta to bypass the liver and enter the systemic circulation. The caudal vena cava carries this oxygenated blood towards the heart and eventually to the rest of the body.
35.
In the fetus blood flows from the Right Ventricle -> Ductus Arteriosus --> ___________
Correct Answer
C. Descending aorta
Explanation
In the fetus, blood flows from the Right Ventricle to the Ductus Arteriosus, which is a blood vessel that connects the pulmonary artery to the descending aorta. Therefore, the correct answer is descending aorta.
36.
In the fetus blood flows from the Right Atrium -> Oval Foramen --> ___________
Correct Answer
B. Left atrium
Explanation
In the fetus, blood flows from the right atrium to the left atrium through the Oval Foramen. This is because the Oval Foramen is a small opening between the two atria that allows blood to bypass the lungs, as they are not yet fully functional in the fetus. This allows oxygenated blood from the placenta to be directed towards the left atrium and then pumped out to the rest of the body through the left ventricle.
37.
What is A?
Correct Answer
B. Parietal
38.
What is B?
Correct Answer
A. Visceral
39.
What is A?
Correct Answer
G. Left/right common carotid
Explanation
The options listed are all arteries in the human body. The common carotid artery is a major artery that supplies blood to the head and neck. It branches into the left and right common carotid arteries, which then further divide into the internal and external carotid arteries. Therefore, the correct answer is left/right common carotid.
40.
What is B?
Correct Answer
E. Left/right axillary
Explanation
The given options are all different parts or branches of the circulatory system. The correct answer, left/right axillary, refers to the axillary artery, which is a major blood vessel that runs through the armpit area. It is responsible for supplying blood to the upper arm and shoulder region.
41.
What is C?
Correct Answer
F. Left/right brachial
Explanation
The given options are all related to different arteries in the body. The correct answer, left/right brachial, refers to the brachial artery on the left and right side of the body. The brachial artery is a major blood vessel in the upper arm that supplies blood to the arm and forearm.
42.
What is D?
Correct Answer
D. Left/right subclavian
Explanation
The left/right subclavian artery is a major blood vessel that arises from the aorta and supplies blood to the arms. It is located on both sides of the body, with one subclavian artery on the left and one on the right.
43.
What is E?
Correct Answer
C. Brachiocephalic
Explanation
The brachiocephalic artery, also known as the innominate artery, is a major artery in the body that branches off from the aortic arch. It supplies oxygenated blood to the right arm and the right side of the head and neck. It is the first branch of the aortic arch and is responsible for providing blood flow to the upper limbs and the brain.
44.
What is F?
Correct Answer
B. Cranial aorta
45.
What is G?
Correct Answer
A. Pulmonary
46.
what is A?
Correct Answer
K. Celiac
47.
what is B?
Correct Answer
F. Caudal aorta
Explanation
The correct answer is caudal aorta. In the given list, the caudal aorta is the only option that is a major blood vessel. The other options are either anatomical terms or specific blood vessels that are not as significant as the caudal aorta. Therefore, the caudal aorta is the most appropriate answer in this context.
48.
what is C?
Correct Answer
J. Left renal
49.
what is D?
Correct Answer
E. Right ovarian
50.
what is E?
Correct Answer
D. Left testicular