Hemoglobin has four polypeptide chains. Two of them are alpha-chains and the other two are beta-chains. Thus, there are 2 dimers that are formed. Each dimer contains one alpha-chain and one beta-chain. The combination of 2 dimers results in the formation of a tetramer. In each of these structures of the polypeptide chain, there are heme groups that contain iron, which is responsible for binding to the diatomic oxygen (O 2 ). One iron binds with one oxygen molecule. Hemoglobin dissociation curve is a graphical representation of the proportion of oxygen saturation level of hemoglobin against the partial pressure of oxygen.

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 46, Problem 9TYK

Summary Introduction

Introduction:

Hemoglobin has four polypeptide chains. Two of them are alpha-chains and the other two are beta-chains. Thus, there are 2 dimers that are formed. Each dimer contains one alpha-chain and one beta-chain. The combination of 2 dimers results in the formation of a tetramer. In each of these structures of the polypeptide chain, there are heme groups that contain iron, which is responsible for binding to the diatomic oxygen (O₂). One iron binds with one oxygen molecule. Hemoglobin dissociation curve is a graphical representation of the proportion of oxygen saturation level of hemoglobin against the partial pressure of oxygen.

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Graph the relationship between hemoglobin–O2 saturation and the partial pressure of O2 in the blood. What is the functional significance of the shape of the O2–hemoglobin dissociation curve? What factors affect the shape of the curve?

O E-If answers (1), (2), (3) and (4) are TRUE Which of the following is NOT true about the liver lobule? * (1) Bile canaliculi transport bile towards the bile ducts located at the corners of the liver lobule. (2) Sinusoidal capillaries drain into the central vein. (3) Liver lobules are capable of producing plasma proteins such as albumin. (4) The portal arteriole takes blood to the liver lobule, while the portal venule takes blood away from the liver lobule. O A - If answers (1), (2) and (3) are TRUE B - If answers (1) and (3) are TRUE O C- If answers (2) and (4) are TRUE O D- If only answer (4) is TRUE O E- If answers (1), (2), (3) and (4) are TRUE Which of the following is NOT true with regards the oxygen-hemoglobin dissociation curve? * 27°C ere to search

The oxyhemoglobin dissociation (saturation) curve shifts to the right as the blood becomes more acidic. Under these conditions answer the following. At a P O2 = 40 mmHg the percent saturation of hemoglobin __________ and the content of oxygen bound to hemoglobin ____________. A. Decreases; decreases B. Increases; increases C. Increases; decreases D. Decreases; increases E. Does not change; does not change

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 46, Problem 9TYK

Summary Introduction

Introduction:

Hemoglobin has four polypeptide chains. Two of them are alpha-chains and the other two are beta-chains. Thus, there are 2 dimers that are formed. Each dimer contains one alpha-chain and one beta-chain. The combination of 2 dimers results in the formation of a tetramer. In each of these structures of the polypeptide chain, there are heme groups that contain iron, which is responsible for binding to the diatomic oxygen (O₂). One iron binds with one oxygen molecule. Hemoglobin dissociation curve is a graphical representation of the proportion of oxygen saturation level of hemoglobin against the partial pressure of oxygen.

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Answer 3

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 46, Problem 9TYK

Summary Introduction

Introduction:

Hemoglobin has four polypeptide chains. Two of them are alpha-chains and the other two are beta-chains. Thus, there are 2 dimers that are formed. Each dimer contains one alpha-chain and one beta-chain. The combination of 2 dimers results in the formation of a tetramer. In each of these structures of the polypeptide chain, there are heme groups that contain iron, which is responsible for binding to the diatomic oxygen (O₂). One iron binds with one oxygen molecule. Hemoglobin dissociation curve is a graphical representation of the proportion of oxygen saturation level of hemoglobin against the partial pressure of oxygen.

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Answer 4

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 46, Problem 9TYK

Summary Introduction