The small capillaries in the lungs are in close contact with the alveoli. A red blood...
The small capillaries in the lungs are in close contact with the alveoli. A red blood cell takes up oxygen during the 0.5 s that it squeezes through a capillary at the surface of an alveolus.
What is the diffusion time for oxygen across the 1-μm -thick membrane separating air from blood? Assume that the diffusion coefficient for oxygen in tissue is 2×10−11m2/s. Give your answer to 1 significant figure.
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The small capillaries in the lungs are in close contact with the
alveoli. A red blood...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capi...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
Name 13. During gas exchange in the lungs, several factors affect the rate of gas diffusion acros...
Name 13. During gas exchange in the lungs, several factors affect the rate of gas diffusion across alveolar (the alveoli are tiny air sacs in the lungs) and tissue membranes. One of the factors is the difference in partial pressures of the gases across the membranes. The gases will diffuse from an area of high partial pressure to an area of low partial pressure, Look at the illustration below and note which blood vessels carry blood away from the lungs...
OPTIONA OPTIONS 1. Site of gas exchange in lungs 2. Bicarbonate formation occurs in the 3....
OPTIONA OPTIONS 1. Site of gas exchange in lungs 2. Bicarbonate formation occurs in the 3. Greater dead space volume alveolar ventilation 4. Anatomic dead space is found in the 5. In normal, quiet breathing, expiration is 6. Gas exchange across the respiratory membrane occurs by 7. During inspiration, the external intercostals 8. A right shift of the OD curve indicates higher oxygen 9. Bicarbonates are transported in the 10. The diaphragm contracts during 11. CO, is mostly transported in...
The Conducting and Respiratory Divisions The conducting division is involved in exchange of air entilation but...
The Conducting and Respiratory Divisions The conducting division is involved in exchange of air entilation but not in respiration. It is the passageway air takes from your nose or mouth to where as exchange takes place in the lunes. Nos exchange takes place in the conducting division, because the layers of the passway are too thick for the pases to diffuse through. It includes the nose, the pharynx, the larynx, the trachea, and the bronchi. List, in order, the pathway...
As actin and myosin filaments slide past each other during muscle contraction, i. actin filaments shorten,...
As actin and myosin filaments slide past each other during muscle contraction, i. actin filaments shorten, while myosin filaments do not ii. myosin filaments shorten, while actin filaments do not iii. both actin and myosin filaments shorten iv. neither actin nor myosin filaments shorten The Ca^2+ required for skeletal muscle contraction i. is released from the sarcoplasmic reticulum. ii. enters the cell due to the opening of voltage regulated Ca^2+ channels from the T tubules. iii. is actively transported into...
Question 2 2 pts Consider how natural selection has worked on the parameters included in Fick's...
Question 2 2 pts Consider how natural selection has worked on the parameters included in Fick's Law to maximize respiration efficiency in animals. In this regard, which of these statements about the characteristics of the mammalian lung is not true? lungs increase the temperature of the rand are most wowing greater solubility of gases at the respiratory surface, increasing the diffusion coefficient The constant delivery of poorly w ated blood toalveoll maintains a steep partial pressure gradient. P2-P1. favori diffusione...
1. Select ALL statements that correctly describe a function of the Respiratory System, or describe a...
1. Select ALL statements that correctly describe a function of the Respiratory System, or describe a process of Respiration. a. Moves air in and out of the body. b. Warms and humidifies the air. c. Regulates the cellular compositon of the blood. d. Filters the air. e. Exchanges gases with the blood. f. Occurs in the Lung. g. All of the above. 2. Select the correct set of gross structures associated with the Lung. A. 1. Two large organs 2....
Name: Chapter 24: The Respiratory System Date Section POST-LABORATORY WORKSHEET The corresponds to the Learning Objectivelsi...
Name: Chapter 24: The Respiratory System Date Section POST-LABORATORY WORKSHEET The corresponds to the Learning Objectivelsi listed in the chapter opener outline Do You Know the Basics? Exercise 24.1: Offactory Mucosa Place the tollowing layers of the weal f the respiratry tract in order from innermest to outermost. t. a. adventitia b mucosa C. submucosa 2 Stratfied squamous epithelial tissue lines the nssal cavity. Exercise 24.2: The Trachea True/False, 3. The trachea is tanterioriposterior)to the esophagus e 4. Which of...
BIOL 1620o, Spring 2019 NAME (Last, Preferred First): Date: 45. What is the most important means by which capillay exchange occurs? 53. Which of the following organs does NOT contain lymphatic...
BIOL 1620o, Spring 2019 NAME (Last, Preferred First): Date: 45. What is the most important means by which capillay exchange occurs? 53. Which of the following organs does NOT contain lymphatic tissue? A. liver B. spleen C. lingual tonsils A. exocytosis B. diffusiorn C. ATP powered pumps D. facilitated diffusion E. pharyngeal tonsils. 46.According to Poiseuille's law A. blood flow is not related to resistance. B. ph of the blood influences flow C. viscosity of the blood is not related...
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a...
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a negative charge spread uniformly over their surfaces The repulsion arising from the excess charge prevents the cells from clumping together. One cell carries -2.10 pC and the other 2.60 pc, and each cell can be modeled as a sphere 3.75 × 10-6 m in radius. If the red blood cells start very far apart and move directly toward each other with the same speed,...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
Name 13. During gas exchange in the lungs, several factors affect the rate of gas diffusion across alveolar (the alveoli are tiny air sacs in the lungs) and tissue membranes. One of the factors is the difference in partial pressures of the gases across the membranes. The gases will diffuse from an area of high partial pressure to an area of low partial pressure, Look at the illustration below and note which blood vessels carry blood away from the lungs...
OPTIONA OPTIONS 1. Site of gas exchange in lungs 2. Bicarbonate formation occurs in the 3. Greater dead space volume alveolar ventilation 4. Anatomic dead space is found in the 5. In normal, quiet breathing, expiration is 6. Gas exchange across the respiratory membrane occurs by 7. During inspiration, the external intercostals 8. A right shift of the OD curve indicates higher oxygen 9. Bicarbonates are transported in the 10. The diaphragm contracts during 11. CO, is mostly transported in...
The Conducting and Respiratory Divisions The conducting division is involved in exchange of air entilation but not in respiration. It is the passageway air takes from your nose or mouth to where as exchange takes place in the lunes. Nos exchange takes place in the conducting division, because the layers of the passway are too thick for the pases to diffuse through. It includes the nose, the pharynx, the larynx, the trachea, and the bronchi. List, in order, the pathway...
As actin and myosin filaments slide past each other during muscle contraction, i. actin filaments shorten, while myosin filaments do not ii. myosin filaments shorten, while actin filaments do not iii. both actin and myosin filaments shorten iv. neither actin nor myosin filaments shorten The Ca^2+ required for skeletal muscle contraction i. is released from the sarcoplasmic reticulum. ii. enters the cell due to the opening of voltage regulated Ca^2+ channels from the T tubules. iii. is actively transported into...
Question 2 2 pts Consider how natural selection has worked on the parameters included in Fick's Law to maximize respiration efficiency in animals. In this regard, which of these statements about the characteristics of the mammalian lung is not true? lungs increase the temperature of the rand are most wowing greater solubility of gases at the respiratory surface, increasing the diffusion coefficient The constant delivery of poorly w ated blood toalveoll maintains a steep partial pressure gradient. P2-P1. favori diffusione...
Name: Chapter 24: The Respiratory System Date Section POST-LABORATORY WORKSHEET The corresponds to the Learning Objectivelsi listed in the chapter opener outline Do You Know the Basics? Exercise 24.1: Offactory Mucosa Place the tollowing layers of the weal f the respiratry tract in order from innermest to outermost. t. a. adventitia b mucosa C. submucosa 2 Stratfied squamous epithelial tissue lines the nssal cavity. Exercise 24.2: The Trachea True/False, 3. The trachea is tanterioriposterior)to the esophagus e 4. Which of...
BIOL 1620o, Spring 2019 NAME (Last, Preferred First): Date: 45. What is the most important means by which capillay exchange occurs? 53. Which of the following organs does NOT contain lymphatic tissue? A. liver B. spleen C. lingual tonsils A. exocytosis B. diffusiorn C. ATP powered pumps D. facilitated diffusion E. pharyngeal tonsils. 46.According to Poiseuille's law A. blood flow is not related to resistance. B. ph of the blood influences flow C. viscosity of the blood is not related...
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a negative charge spread uniformly over their surfaces The repulsion arising from the excess charge prevents the cells from clumping together. One cell carries -2.10 pC and the other 2.60 pc, and each cell can be modeled as a sphere 3.75 × 10-6 m in radius. If the red blood cells start very far apart and move directly toward each other with the same speed,...
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