AP Biology : AP Biology
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Example Questions
Example Question #1081 : Ap Biology
Which chambers of the heart contain oxygen-poor blood?
Right ventricle and left ventricle
Right atrium and right ventricle
Left atrium and left ventricle
Right atrium and left atrium
Left atrium and right ventricle
Right atrium and right ventricle
The right side of the heart contains oxygen-poor blood. The right atrium receives oxygen-poor blood from the body through the superior and inferior vena cavae. This blood then flows into the right ventricle and then out the pulmonary valve into the lungs where the blood becomes oxygen-rich. The oxygen-rich blood goes to the right atrium then to the right ventricle where it is pumped to the system to provide oxygen to the cells of the body.
Example Question #1082 : Ap Biology
Which correctly lists all the valves of the heart?
Tricuspid valve, pulmonary valve, bicuspid valve, and aortic valve
Tricuspid valve, bicuspid valve, aortic valve, and brachial valve
Tricuspid valve and aortic valve
Tricuspid valve, bicuspid valve, and aortic valve
Tricuspid valve, pulmonary valve, and aortic valve
Tricuspid valve, pulmonary valve, bicuspid valve, and aortic valve
There are four valves in the heart. The tricuspid valve separates the right atrium from the right ventricle. The pulmonary valve separates the right ventricle from the pulmonary arteries. The bicuspid valve separates the left atrium from the left ventricle. The aortic valve separates the left ventricle from the aorta. These valves separate the chambers of the heart, and prevent back flow from one chamber to the other. The tricuspid valve is also known as the right atrioventricular valve, and the bicuspid valve is also known as the left atrioventricular valve, and the mitral valve.
Example Question #1083 : Ap Biology
Which structure of the adult human heart receives blood directly from the pulmonary circulation?
Left ventricle
Right atrium
Left atrium
Pulmonary artery
Right ventricle
Left atrium
The pulmonary circulation carries oxygenated blood from the lungs to the left atrium via the pulmonary veins. From there it enters the left ventricle, then it is pumped out through the aorta to serve organs of the body.
Example Question #1084 : Ap Biology
Which of the following statements about adult human heart anatomy are false?
The right atrium receives oxygen-poor blood from the systemic circulation
The left atrium sends oxygen-rich blood to the left ventricle
The left ventricle pumps oxygen-rich blood into the systemic circulation
The left atrium receives oxygen-rich blood from the pulmonary circulation
The right ventricle pumps oxygen-rich blood into the pulmonary circulation
The right ventricle pumps oxygen-rich blood into the pulmonary circulation
The right ventricle pumps oxygen-poor blood into the pulmonary circulation, not oxygen-rich blood. This blood leaves the right ventricle through the pulmonary artery and reaches the lungs. All other answer choices are true statements.
Example Question #24 : Circulatory System
When you listen to a beating heart, you will notice two sounds (“lub” and “dub”). The first sound (“lub”) is when the mitral and the tricuspid valves close at the same time. The second sound (“dub”) is due to the closing of the pulmonary and the aortic valves at the same time.
In some heart conditions, one might hear an extra sound between the “lub” and the “dub” sounds. Which of the following choices is the most plausible explanation for the extra sound?
The mitral valve closed, opened, and then closed again
The pulmonary valve did not close completely
The tricuspid valve opened too late
The aortic valve did not close completely
The mitral valve did not close completely
The mitral valve did not close completely
The first sound (“lub”) occurs when the mitral and the tricuspid valves close. The second sound (“dub”) occurs when the pulmonary and the aortic valves close. The mitral and tricuspid valves close after both the left and the right atrias have contracted and have released blood into the ventricles. Transitioning towards the second heart sound, the ventricles contract and release blood into the systemic and pulmonary circulatory systems. If an extra noise is heard between the “lub” and the “dub” sounds, then it meant that while the ventricle is contracting, some blood is being pushed back into the atria(s) because the tricuspid valve and/or the mitral valve(s) did not completely close, resulting in regurgitation.
Example Question #1085 : Ap Biology
When you listen to a beating heart, you will notice two sounds (“lub” and “dub”). The first sound (“lub”) is when the mitral and the tricuspid valves close at the same time. The second sound (“dub”) is due to the closing of the pulmonary and the aortic valves at the same time. In some heart conditions, one might hear an extra sound between the “lub” and the “dub” sounds.
In some heart conditions, one might hear a splitting sound during the “dub” sound. Which of the following choices is the most plausible explanation for the extra sound?
The aortic and the pulmonary valves closed at the same time
The tricuspid and the pulmonary valves closed at the same time
The aortic and the pulmonary valves did not close at the same time
The mitral the pulmonary valves did not close at the same time
The mitral valve and the tricuspid valve did not close at the same time
The aortic and the pulmonary valves did not close at the same time
The “dub” sound occurs when both the aortic and the pulmonary valves close at the same time. When one closes later than the other, then the valve that closed late will create a splitting sound; therefore, creating an extra sound close to the first sound.
Example Question #1086 : Ap Biology
When you listen to a beating heart, you will notice two sounds (“lub” and “dub”). The first sound (“lub”) is when the mitral and the tricuspid valves close at the same time. The second sound (“dub”) is due to the closing of the pulmonary and the aortic valves at the same time. In some heart conditions, one might hear an extra sound between the “lub” and the “dub” sounds.
In some heart conditions, one might hear a split sound during the “lub.” Which of the following choices is the most plausible explanation for the extra sound?
The pulmonary and the tricuspid valves did not close at the same time
The pulmonary and the mitral valves closed at the same time
The mitral and the tricuspid valves closed at the same time
The aortic and the pulmonary valves did not close at the same time
The mitral and the tricuspid valves did not close at the same time
The mitral and the tricuspid valves did not close at the same time
The "lub" heart sound occurs when both the mitral and the tricuspid valves close at the same time. If one hears a split sound, then it indicates that one of the two valves closed late.
Example Question #118 : Systems Physiology
The migration of cells is necessary for proper development during fetal life. At around the third week of fetal development, hematopoietic stem cells can be found in the yolk sac as well as in the mesoderm of the aorta, the gonads and in the mesonephros. At around the 3rd month, these stem cells migrate to the liver with some to the spleen and the lymph node. At around the 4thmonth, these cells then migrate to the bone marrow.
When taking a cross section of a bone, one will notice that some bone marrows are red while others are fat. Yellow bone marrows are inactive stem cells with the majority being fat cells. Active bone marrows are red. At birth, all of the bone marrows are red. At around the time of puberty, most are red but the amount decreases to 50% at around 18-25 years of age. Despite the change in bone marrow activity, membranous bones and of the arms of and legs remain active throughout life. However, the activity can be changed during pathological conditions.
Which scenario(s) will result in the activation of inactive bone marrows?
I. An injury resulting in minor bleeding of the pinky
II. An injury resulting in a rupture of the abdominal aorta
III. A paper cut of the 4th phalange
III only
I and II
II and III
II only
I only
I only
The activation of inactive bone marrows occur when the increase production of red blood cells is required. An major injury that result massive bleeding will reactive inactive bone marrows. Of the answer choices, a rupture of the abdominal aorta will result in massive internal bleeding.
Example Question #1087 : Ap Biology
In the heart, blood is oxygen-rich in the __________, and oxygen-poor in the __________.
superior vena cava . . . right ventricle
pulmonary arteries . . . pulmonary veins
left atrium . . . right atrium and right ventricle
right atrium . . . left ventricle
left ventricle . . . aorta
left atrium . . . right atrium and right ventricle
Blood is oxygenated in the lungs and pumped through the pulmonary veins to the left atrium of the heart. The blood is then pumped to the left ventricle, which pumps the oxygen-rich blood throughout the body. The oxygen-poor blood returns to the heart by entering the right atrium, and remains oxygen poor as it is pumped into the right ventricle and through the pulmonary arteries until it is oxygenated again in the lungs.
Example Question #1 : Circulatory Physiology
Which of the following traits is shared by both red blood cells (erythrocytes) and white blood cells (leukocytes)?
They all mature in bone marrow
They all contain a nucleus
They are all produced in bone marrow
They all contain mitochondria
They are all produced in bone marrow
Erythrocytes and leukocytes are both produced and mature in bone marrow, with the exception of T cells, a type of white blood cell that matures in the thymus. Unlike leukocytes, red blood cells contain no nuclei or mitochondria, which could interfere with transporting oxygen, carbon dioxide, and nutrients.
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