Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 11, Problem 3SQE
Summary Introduction
To calculate:
The total change in resistance due to increased hematocrit level in a person with polycythemia and its effect on peripheral resistance.
Introduction :
Polycythemia is one of the blood cancers, in which bone marrow in the body starts producing more red blood cells than usual. Due to the higher level of the red blood cells in the overall blood volume, the hematocrit (proportion of red blood cells in the blood) increases.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Systemic blood pressure is defined as the ratio of two pressures—systolic and diastolic—both expressed in millimeters of mercury. Normal blood pressure is about 120mm/80mm which is usually just stated as 120/80. What would normal systemic blood pressure be if, instead of millimeters of mercury, we expressed pressure in each of the following units, but continued to use the same ratio format?
Part A)
atmosheres =
a)120/ 80
b) 2.32/ 1.54
c) 0.158/ 0.105
d) 1.60x10^4/ 1.06x10^4
Part B)
torr =
a) 120/ 80
b) 2.32/ 1.54
c) 0.158/ 0.105
d) 1.60x10^4/ 1.06x10^4
Part C)
Pa =
a)120/ 80
b) 2.32/ 1.54
c) 0.158/ 0.105
d) 1.60x10^4/ 1.06x10^4
Part D)
N/ m^2 =
a)120/ 80
b) 2.32/ 1.54
c) 0.158/ 0.105
d) 1.60x10^4/ 1.06x10^4
Part E)
psi =
a)120/ 80
b) 2.32/ 1.54
c) 0.158/ 0.105
d) 1.60x10^4/ 1.06x10^4
Total blood volume in the capillary tube is 20mm, the packed cell volume(red blood cells) is 7.1 mm, and the plasma portion measures 12.9mm.
How is hematocrit calculated?
What is the blood flow rate through a vessel given the following: ΔP = 120 mmHg; radius = 6 mm; length = 20 mm; and viscosity of the blood = 4.5? ? (conversion factors: 1 mmHg = 0.013 dynes/cm2 and a viscosity of 1.0 = 0.01 dyne sec/cm2)
Chapter 11 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Blood pressure is usually given as the ratio of the maximum pressure (systolic pressure) to the minimum pressure (diastolic pressure). For example a typical value for this ratio for a human would be 120/70, where the pressures are in mm Hg (millimeters of mercury, SG = 13.6). What would these pressures be in kPa (kilo Pascals)?: (a) systolic pressure (kPa), (b) diastolic pressure (kPa).arrow_forwardCalculate the hematocrit of a female patient using the following information:The height of the whole body is 80mm, and the height of the RBC's is 28mm. How is her hematocrit value as compared to the hematocrit normal value of adult femal?arrow_forwardWomersley number (a) of a human aorta is 20 and for the rabbit aorta is 17, the blood density is approximately the same across the species. The values of viscosity were 0.0035 Ns/m² for the human and 0.0040 Ns/m² for the rabbit. The diameter of the aorta is 2.0 cm for the man, and 0.7 cm for the rabbit, estimate the heart rate beats per minute (bpm) for both species.arrow_forward
- Blood plasma flows with a rate of 0.4 cm³/s through a tube with a diameter d = 0.18 cm and length 1 = 1.8 m at a temperature of 20°C. The pressure at the tube entrance is P2 = 1.48 x 104 N/m2. If the temperature of the tube and plasma reaches 29°C, what is the tube entrance pressure P2' needed to maintain the flow rate and pressure at the tube exit constant. Consider 120°c = 1.81 mPa·s and n29°c = 1.28 mPa.s.arrow_forwardIf you have 6-MAM, acetylcodeine, and heroin in a GCMS column (silica capillary column), why is the elution order: acetylcodeine, then 6-MAM, then heroin (in order from fastest elution to slowest)?arrow_forwardExplain why mean arterial pressure is not equal to (systolic pressure – diastolic pressure) ÷ 2? Put another way, why is MAP not calculated by taking the traditional arithmetic mean of systolic and diastolic blood pressures?arrow_forward
- Nizatidine injection (25 mg/mL) is supplied in 4-mL vials. The prescription states that for continuous infusion 'dilute 300 mg in 150 mL and give at a rate of 10 mg/hour'. If this procedure is adopted, calculate: (a) how many vials of nizatidine injection will be required (b) the flow rate (in mg/hour). NOTE: PLEASE GIVE THE ANSWER WITHIN 2 HOURS THANK YOUarrow_forwardMedical evidence shows that a small change in the radius of an artery can indicate a large change in blood flow. For example, if one artery has a radius only 5% larger than another, the blood flow rate is 1.22 times as large. Further information is given in the table below. Increase in radius Times greater bloodflow rate 5% 1.22 10% 1.46 15% 1.75 20% 2.07 (a) Use the average rate of change to estimate how many times greater the blood flow rate is in an artery that has a radius 8% larger than another. (Round your answer to three decimal places.)1.364 times greater(b) Explain why if the radius is increased by 8% and then we increase the radius of the new artery by 8% again, the total increase in the radius is 16.64%. x + 8% of xx + 8/100 X xx + 0.08x = 1.08x1.08x + 8% of (1.08x)1.08x + 8/100 X (1.08x)1.08x + 0.0864x = 0.1664x = 16.64% (c) Use parts (a) and (b) to answer the following question: How many times greater is the blood flow rate in an artery that is 16.64%…arrow_forwardWhat is the approximate volume of blood plasma in a lean 60-kg male? In a lean 60-kg female? (Note: One liter of body fluid has a mass of 1 kilogram.)arrow_forward
- Hemodynamics are the dynamics of blood flow. Can the Bernoulli's equation be used to study hemodynamics in the cardiovascular system? Why or why not? You should discuss all four of the assumptions of Bernoulli's equation when answering this question. Jugular vein (also subclavian vein from arms) Pulmonary artery Superior vena cava Interior vena cava Hepatic vein Liver Hepatic portal vein Renal vein Iliac vein CO₂ CO₂ Head and arms Lungs Heart Kidneys Trunk and legs Carotid artery (also subclavian artery to arms) Pulmonary vein Aorta Hepatic artery Mesenteric arteries Digestive tract Renal artery Iliac arteryarrow_forwardDA-LTE Blood is flowing through a bundle of hollow fiber tubes that are each 50 µm in diameter. There are 10,000 tubes in the bundle. The hollow fiber tube length is 12 cm and the pressure drop across each tube is found to be 250 mmHg. The hematocrit of the blood is 0.40. Estimate the blood flow rate for these conditions in each tube.arrow_forwardIn a woman with body mass 70 kg blood quantity is 4.9 liters; hematocrit is 32%, the quantity of erythrocytes is 3.0*10^12/l, hemoglobin is 105 g/l color parameter is 1.0, the minimum osmotic resistance of erythrocytes is 0.38%NaCl; the maximum osmotic resistance of erythrocytes is 0.34%NaCl Such blood analises testifies first of all about: A. the water excess in the organism B. the lack of water in the organism C. osmotic hemolysis of erythrocytes D. chemical hemolysis of erythrocytes E. the lack of iron in blood plasmaarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning