1. Is this statement correct or incorrect? Explain. During strenuous exercise, the oxygen-hemoglobin dissociation curve shifts to the right. This rightward shift reflects an increase in the affinity of hemoglobin for oxygen and favors loading of O2 onto hemoglobin in the lungs.2. Is this statement correct or incorrect? Explain. Compared to hemoglobin, myoglobin has a lower binding affinity for O2 and a higher O2 binding capacity, two characteristics that allow myoglobin to efficiently provide skeletal muscle cells with a readily-accessible reservoir of O2.

Question
Asked Nov 8, 2019
29 views

1. Is this statement correct or incorrect? Explain. 

During strenuous exercise, the oxygen-hemoglobin dissociation curve shifts to the right. This rightward shift reflects an increase in the affinity of hemoglobin for oxygen and favors loading of O2 onto hemoglobin in the lungs.

2. Is this statement correct or incorrect? Explain. 

Compared to hemoglobin, myoglobin has a lower binding affinity for O2 and a higher O2 binding capacity, two characteristics that allow myoglobin to efficiently provide skeletal muscle cells with a readily-accessible reservoir of O2.

 

check_circle

Expert Answer

Step 1

Since you have asked multiple questions, we will solve the first question for you. If you want any specific question to be solved then please specify the question number or post only that question.

Step 2

Almost all the oxygen carried by blood is bound and transported by a protein molecule called hemoglobin which is present in the erythrocytes or red blood cells. The oxygenated form of haemoglobin is called oxyhemoglobin. Hemoglobin in arterial blood, is about 96% saturated with oxygen whereas, in the venous blood, it is only about 64% saturated. Thus, hemoglobin that passes through a tissue releases about one-third of the oxygen it carries. Hemoglobin undergoes two transition forms such as a low-affinity state or T state and a high-affinity state or R state. Thus, binding curve is S-shaped, or sigmoid curve or oxygen dissociation curve.

Step 3

A sigmoid curve shows a transition of hemoglobin from a low-affinity to a high-affinity state. It is more sensitive to the slight changes in “O2 concentration” between the tissues and the lungs. Several physiologic factors also can shift the curve either to the left or the right. The rightward shift represents a decrease in affinity of hemog...

High-affinity
state
(During
Transition from
low- to high
affinity state
Strenuous
activity)
Low-affinity
state
help_outline

Image Transcriptionclose

High-affinity state (During Transition from low- to high affinity state Strenuous activity) Low-affinity state

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Biology

Biochemistry

Related Biology Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: All of the following vitamins play a critical role in DNA synthesis EXCEPT:     folate.   th...

A: Folate, thiamine, and vitamin B12 play a critical role in DNA synthesis except vitamin B6. Vitamin B...

question_answer

Q: How are potentials measured in excitable tissues?

A: An excitable tissue responds to the stimulation and contracts to provide movement. They are capable ...

question_answer

Q: Which vessels in the circulatory system allow diffusion of oxygen and nutrients across their cell la...

A: The blood vessels are part of the circulatory system and it transports blood all over the body. The ...

question_answer

Q: What is the ploidy in parent cells in mitosis and meiosis? What is the ploidy of daughter cells in m...

A:  Ploidy means the number of chromosomes sets in the cell. Eukaryotes have a single set i.e. haploid ...

question_answer

Q: Which type of T cell is most important in both cellular and humoral immunity?

A: There are two main mechanisms of immunity within the adaptive immune system – humoral and cellular. ...

question_answer

Q: What kinds of changes in ion conductance may be expected in an action potential? And how do ion chan...

A: An action potential takes place if the membrane potential of a particular cell location rises and fa...

question_answer

Q: What are photosystems 1 and 2? Can you also explain what do they have to do with E-fixing and C-fixi...

A: Photosystems I and II are the protein mediated complex and the main aim is to produce energy (ATP an...

question_answer

Q: What happens during the malting process in beer?

A: Malting involves the controlled germination of grains to mobilize the enzymes like amylases and prot...

question_answer

Q: What can you tell me about the otifactory, optic, vagus, and vestibulachleur cranial nerves?

A: Olfactory nerve: It is the first nerve from 12 cranial nerves and represented as CN I. It conducts i...