1.
Which of the following can increase the risk of high blood pressure?
Correct Answer
D. All of the above
Explanation
All of the listed factors can increase the risk of high blood pressure. A family history of high blood pressure suggests a genetic predisposition to the condition, making an individual more likely to develop it. Obesity is also a risk factor as excess body weight puts additional strain on the heart and blood vessels. Smoking damages blood vessels, leading to narrowing and increased blood pressure. Therefore, all three factors combined can significantly increase the risk of high blood pressure.
2.
Blood pressure refers to the force of blood pushing against
Correct Answer
A. Artery walls
Explanation
Blood pressure refers to the force exerted by blood against the walls of arteries. Arteries are the blood vessels that carry oxygenated blood away from the heart to the rest of the body. The force of blood against the artery walls is measured in millimeters of mercury (mmHg) and is recorded as two numbers - systolic pressure over diastolic pressure. Systolic pressure is the force when the heart contracts, while diastolic pressure is the force when the heart is at rest. Therefore, the correct answer is "Artery walls."
3.
When one moves along the vasculature away from the heart, the largest pressure drop in the circulatory system occurs along which of the following?
Correct Answer
A. Arterioles
Explanation
The correct answer is Arterioles. Arterioles are small blood vessels that connect arteries to capillaries. They have a smaller diameter compared to arteries, which leads to increased resistance to blood flow. This increased resistance causes a significant pressure drop as blood moves from arterioles to capillaries. In contrast, venules are small blood vessels that connect capillaries to veins, and large veins have a lower resistance to blood flow compared to arterioles. Therefore, the largest pressure drop in the circulatory system occurs along arterioles.
4.
The arterial system is also referred to as
Correct Answer
B. Pressure reservoir
Explanation
The arterial system is referred to as a pressure reservoir because it is responsible for maintaining blood pressure throughout the body. Arteries have elastic walls that allow them to expand and contract, which helps to regulate blood flow and maintain a constant pressure. This pressure is necessary for efficient circulation and delivery of oxygen and nutrients to the body's tissues.
5.
The venous system is also referred to as
Correct Answer
A. Volume reservoir
Explanation
The venous system is referred to as a volume reservoir because it has the ability to store a large amount of blood. Unlike the arterial system, which is under high pressure and constantly delivering blood to the tissues, the venous system has low pressure and can hold a significant volume of blood. This allows it to serve as a storage system, releasing blood as needed to maintain adequate circulation.
6.
What is the range of systolic pressure?
Correct Answer
C. 100-120
Explanation
The range of systolic pressure refers to the normal range of blood pressure in the arteries when the heart beats. A systolic pressure range of 100-120 is considered normal for adults. Systolic pressure below 100 may indicate low blood pressure, while systolic pressure above 120 may indicate high blood pressure. Therefore, the correct answer is 100-120.
7.
What is the range of diastolic pressure?
Correct Answer
A. 60-89
Explanation
The range of diastolic pressure refers to the lowest level of blood pressure in the arteries when the heart is at rest between beats. A normal diastolic pressure range is typically considered to be between 60-89 mmHg. This means that a diastolic pressure reading below 60 or above 89 may indicate abnormal blood pressure levels.
8.
Which of the following represents the "pump" of blood by the heart?
Correct Answer
B. Systolic pressure
Explanation
The "pump" of blood by the heart refers to the force exerted by the heart to push blood out into the arteries. Systolic pressure represents the maximum pressure exerted on the arterial walls during a heartbeat, when the heart contracts and pumps blood into the arteries. This pressure is higher than diastolic pressure, which represents the minimum pressure in the arteries when the heart is at rest between beats. Venal pressure refers to the pressure in the veins, while arterial pressure refers to the pressure in the arteries, but neither of these directly represent the "pump" of blood by the heart.
9.
Which of the following represents the "time in between" the pumps of the heart?
Correct Answer
B. Diastolic pressure
Explanation
Diastolic pressure represents the "time in between" the pumps of the heart. During this phase, the heart relaxes and refills with blood, preparing for the next contraction. It is the lower number in a blood pressure reading and indicates the pressure in the arteries when the heart is at rest.
10.
Which of the following is the difference between systolic and diastolic pressure?
Correct Answer
D. Pulse pressure
Explanation
Pulse pressure is the difference between systolic and diastolic pressure. Systolic pressure is the maximum pressure exerted on the arterial walls during a heartbeat, while diastolic pressure is the minimum pressure when the heart is at rest between beats. Pulse pressure is an important indicator of cardiovascular health and can help assess the elasticity and efficiency of blood vessels. It is calculated by subtracting the diastolic pressure from the systolic pressure.