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Lecture 40

HSC 2100 Lecture 40: HSC 2100 Chapter 40
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3 Pages
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Spring 2017

Department
Health Sciences
Course Code
HSC 2100
Professor
James Crawlynn
Lecture
40

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Adaptive advantages of haemoglobin
-4 bonding places (heme groups) for oxygen binding available on each haemoglobin molecule
-Ability of haemoglobin to bind with oxygen increases with each subsequent oxygen molecule
-Capacity to release oxygen increases where carbon dioxide is present, replenishing cells recently
engaged in cellular respiration
-Prevents dissolved oxygen upsetting the osmotic balance of the plasma
Heme group
Location on haemoglobin molecule where oxygen binding can occur
Structure and function of arteries
Carries oxygenated blood away from the heart
-Thick, muscular wall with elastic layer
Able to withstand high pressure bursts of blood from the heart
-Medium sized lumen
Encourages fast movement of blood around the body
Structure and function of veins
Carries deoxygenated blood back to the heart
-Thin, muscular wall
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Description
Adaptive advantages of haemoglobin 4 bonding places (heme groups) for oxygen binding available on each haemoglobin molecule Ability of haemoglobin to bind with oxygen increases with each subsequent oxygen molecule Capacity to release oxygen increases where carbon dioxide is present, replenishing cells recently engaged in cellular respiration Prevents dissolved oxygen upsetting the osmotic balance of the plasma Heme group Location on haemoglobin molecule where oxygen binding can occur Structure and function of arteries Carries oxygenated blood away from the heart Thick, muscular wall with elastic layer Able to withstand high pressure bursts of blood from the heart Medium sized lumen Encourages fast movement of blood around the body Structure and function of veins Carries deoxygenated blood back to the heart Thin, muscular wall
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