Smoking tobacco is bad for your circulatory health. In an attempt to maintain the blood’s capacity...
Smoking tobacco is bad for your circulatory health. In an attempt to maintain the blood’s capacity to deliver oxygen, the body increases its red blood cell production, and this increases the viscosity of the blood. In addition, nicotine from tobacco causes arteries to constrict.
For a nonsmoker, with blood viscosity of 2.5 × 10–3 Pa·s, normal blood flow requires a pressure difference of 8.0 mm Hg between the two ends of a certain artery. If this person were to smoke regularly, his blood viscosity would increase to 2.8 × 10–3 Pa·s, and the diameter of his artery would constrict by 10%.
Assuming that the pressure difference between the two ends of the artery does NOT change (not necessarily a good assumption), how would the blood flow be affected by the increase in viscosity of the blood and the decrease in the diameter of the artery?
The change in viscosity would decrease the blood flow.
The change in viscosity would increase the blood flow.
The change in viscosity would not change the blood flow.
The change in diameter would decrease the blood flow.
The change in diameter would increase the blood flow.
The change in diameter would not change the blood flow.
1.2.3.4.5.6
Again, assuming the pressure difference has not changed, which of the two effects would have a larger effect on the amount of blood flow?
The change in viscosity.
The change in diameter.
The effects of the two changes would be equal.
Neither would have an effect on the flow.
There is not enough information to tell.
1.2.3.4.5.6
Homework Answers
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Smoking tobacco is bad for your circulatory health. In an
attempt to maintain the blood’s capacity...
3. 1/2 points | Previous Answers My Notes Smoking tobacco is bad for your circulatory health. In ...
3. 1/2 points | Previous Answers My Notes Smoking tobacco is bad for your circulatory health. In an attempt to maintain the blood's capacity to deliver oxygen, the body increases its red blood cell production, and this increases the viscosity of the blood. In addition, nicotine from tobacco causes arteries to constrict. (a) For a nonsmoker, with blood viscosity of 2.50 x 103 Pa s, normal blood flow requires a pressure difference of 8 mm Hg between the two ends...
The blood pressure at your heart is approximately 100 mm of Hg. As blood is pumped...
The blood pressure at your heart is approximately 100 mm of Hg. As blood is pumped from the left ventricle of your heart, it flows through the aorta, a single large blood vessel with a diameter of about 2.5 cm. The speed of blood flow in the aorta is about 60 cm/s. Any change in pressure as blood flows in the aorta is due to the change in height: the vessel is large enough that viscous drag is not a...
In hemodynamics, blood flow through the cardiovascular system can be modeled as an electric circuit in...
In hemodynamics, blood flow through the cardiovascular system
can be modeled as an electric circuit in which the blood serves as
electricity, the blood vessels as resistive wires, and the heart as
a battery (see Figure 1).
Figure 1 Cardiovascular circuit model
Ohm’s law states that the voltage drop ΔV across each element,
the current I flowing through it, and its electrical
resistance R are related by ΔV = IR. In a blood vessel, pressure
difference between one vessel and...
21.3 HEMODYNAMICS: FACTORS AFFECTING BLOOD FLOw 815 proteins in plasma. The higher the blood's viscoily.the higher the resistance. Any condition that increases the visoityo ch as dehydration...
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answer this question BLOOD AND FLUID QUESTION 1 (0A patient's blood pressure taken at the arm...
answer this question
BLOOD AND FLUID QUESTION 1 (0A patient's blood pressure taken at the arm is 120 mmHg systolic and 70 mmHg diastolic. What would you expect the blood pressure (systolic and diastolic pressures) to be at the top of the head given that this point is 40 cm above the measurement point? Remember blood pressure is a gauge pressure and that 1 kPa = 7.5 mmHg. (The density of blood is about 1060 kg/m.) Choose one: a. 89...
need help asap introduction Blood pressure measurements are always expressed by two numbers, the systolic pressure...
need help asap
introduction Blood pressure measurements are always expressed by two numbers, the systolic pressure over the diastolic pressure. The blood pressure cuff is inflated until the air pressure within the cuff exceeds the blood pressure in the artery in the arm. This causes the artery to collapse, temporarily shutting down the flow of blood. Then, pressure in the cuff is slowly reduced until air pressure in the cuff becomes less than pressure in the artery, allowing blood to...
When the left ventricle contracts, blood forces out of the ventricle into the ___________ and out...
When the left ventricle contracts, blood forces out of the ventricle into the ___________ and out into the body. When the blood leaves the heart and passes through the aorta, it continues on into smaller vessels called __________________ that extend throughout the body. As the blood travels through each artery, the artery gradually _________________ in diameter becoming first an arterial and then a capillary. Drugs that cause vasoconstriction _______________ the diameter of blood vessels, whereas drugs that cause vasodilation ________________...
When the left ventricle contracts, blood forces out of the ventricle into the ___________ and out into the body. When t...
When the left ventricle contracts, blood forces out of the ventricle into the ___________ and out into the body. When the blood leaves the heart and passes through the aorta, it continues on into smaller vessels called __________________ that extend throughout the body. As the blood travels through each artery, the artery gradually _________________ in diameter becoming first an arterial and then a capillary. Drugs that cause vasoconstriction _______________ the diameter of blood vessels, whereas drugs that cause vasodilation ________________...
QUESTION 1 Vasovagal syncope is one of the most common causes of fainting and occurs in...
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Scenario: J.T. a 48-year-old construction worker with a 25-pack-year smoking history, is admitted to your floor...
Scenario: J.T. a 48-year-old construction worker with a 25-pack-year smoking history, is admitted to your floor with a diagnosis of rule out myocardial infarction (R/O MI). He has significant male-pattern obesity and reports a dietary history of high-fat food. His wife brought him to the emergency department after he complained of unrelieved “indigestion.” His admission vital signs (VS) were BP 202/124, pulse 106, respirations 18, and oral temperature 98.2°F (36.8 ° C). J.T. was put on oxygen (O2) by nasal...
3. 1/2 points | Previous Answers My Notes Smoking tobacco is bad for your circulatory health. In an attempt to maintain the blood's capacity to deliver oxygen, the body increases its red blood cell production, and this increases the viscosity of the blood. In addition, nicotine from tobacco causes arteries to constrict. (a) For a nonsmoker, with blood viscosity of 2.50 x 103 Pa s, normal blood flow requires a pressure difference of 8 mm Hg between the two ends...
In hemodynamics, blood flow through the cardiovascular system
can be modeled as an electric circuit in which the blood serves as
electricity, the blood vessels as resistive wires, and the heart as
a battery (see Figure 1).
Figure 1 Cardiovascular circuit model
Ohm’s law states that the voltage drop ΔV across each element,
the current I flowing through it, and its electrical
resistance R are related by ΔV = IR. In a blood vessel, pressure
difference between one vessel and...
21.3 HEMODYNAMICS: FACTORS AFFECTING BLOOD FLOw 815 proteins in plasma. The higher the blood's viscoily.the higher the resistance. Any condition that increases the visoityo ch as dehydration or polycythemia (an onosual -A hlood cellis), thus increases blood pressun blood presssure has dropped to about in blood cells, dac to a whose weight is 160 pounds has a total length of blood vessels equal to 70,000 miles. If he ains 1 pound of fat, his fat tissue will grow an extra...
answer this question
BLOOD AND FLUID QUESTION 1 (0A patient's blood pressure taken at the arm is 120 mmHg systolic and 70 mmHg diastolic. What would you expect the blood pressure (systolic and diastolic pressures) to be at the top of the head given that this point is 40 cm above the measurement point? Remember blood pressure is a gauge pressure and that 1 kPa = 7.5 mmHg. (The density of blood is about 1060 kg/m.) Choose one: a. 89...
need help asap
introduction Blood pressure measurements are always expressed by two numbers, the systolic pressure over the diastolic pressure. The blood pressure cuff is inflated until the air pressure within the cuff exceeds the blood pressure in the artery in the arm. This causes the artery to collapse, temporarily shutting down the flow of blood. Then, pressure in the cuff is slowly reduced until air pressure in the cuff becomes less than pressure in the artery, allowing blood to...
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