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Dental Biochemistry > Lec 9 Hemoglobin Gas Transport > Flashcards

Lec 9 Hemoglobin Gas Transport Flashcards

1
Q

a protein with a heme prosthetic group

A

hemoglobin

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2
Q

solubility of oxygen increases in the blood via

A

hemoglobin

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3
Q

globin is a blank

A

protein

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4
Q

heme is a blank group of the hemoglobin

A

prosthetic

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5
Q

two subunits of hemoglobin are blank while the other two are blank

A

alpha, beta

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6
Q

hemoglobin has blank structure so it has blank

A

quaternary, allostery

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7
Q

hemoglobin has all blank

A

alpha helices

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8
Q

each globin has a blank

A

heme

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9
Q

hemoglobin is a blankenzyme

A

holo

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10
Q

1 molecule of Hb binds blank dioxygens

A

4

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11
Q

hemoglobin is made of blank non identical alpha helices

A

8

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12
Q

hemoglobin blank oxygen

A

transports

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13
Q

blank stores oxygen

A

myoglobin

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14
Q

blank has more oxygen

A

myoglobin

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15
Q

oxygen is sandwiched between blank in hemoglobins

A

histidine

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16
Q

hemoglobin will either be fully blank or blank

A

oxygenated, deoxygenated

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17
Q

homotropic allosteric effect means same blank

A

ligand (like oxygen)

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18
Q

homotropic and heterotropic allosteric effects can be either blank or blank

A

positive, negative

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19
Q

oxygen blank binding of more oxygen

A

promotes

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20
Q

2,3 BPG promotes blank of oxygen

A

dissociation

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21
Q

myoglobin is a blank chain and does not have blank

A

single, quaternary strucutre

22
Q

myoglobin also supplies oxygen to blank but has a blank affinity

A

tissues, higher

23
Q

hemoglobin binds oxygen in the blank where the concentration is blank

A

lungs, high

24
Q

myoglobin binds oxygen in blank where concentration is blank

A

muscle, low (storage)

25
Q

decreased pH moves oxygen dissociation curve to the blank

26
Q

lower pH means blank oxygen in the tissue

27
Q

physiological adaptation where hemoglobin unloads oxygen more efficiently when there are increased protons

A

bohr effect

28
Q

2,3 bpg is a blank allosteric effector

A

negative heterotropic

29
Q

2,3 bpg is from blank in active tissues

30
Q

2,3 bpg moves oxygen dissociation curve blank

31
Q

fetal hemoglobin lacks the two blank subunits

32
Q

fetal hemoglobin cannot bind blank

33
Q

negative heterotropic allosteric effector unlike oxygen

34
Q

carbon dioxide, bicarbonate, and carbonic acid make up a blank system

35
Q

carbon dioxide is more blank than oxygen

36
Q

carbonic acid ionizes to form blank

A

bicarbonate

37
Q

more than blank percent of carbon dioxide is transported as bicarbonate

38
Q

enzyme that catalyzes the reaction of co2 and water

A

carbonic anhydrase

39
Q

when concentration of bicarbonate increases, blood pH blank, but excretion of CO2 compensates for increased blank to blank pH

A

falls, H+, raise

40
Q

co2 can react with hemoglobin to form carbamino compounds known as blank

A

carbamates

41
Q

carbamates help hemoglobin transport co2 to blank

42
Q

oxy form is the blank form

43
Q

deoxy form of hemoglobin is blank form

44
Q

as bicarbonate is transported out of RBC, blank ions enter the RBC to keep blank

A

chloride, electrical balance

45
Q

chloride shift that pumps bicarbonate out and chlroride in is a blank system

46
Q

chloride acts as a blank

A

buffer system

47
Q

O2 and CO2 transport are blank

A

integrated

48
Q

carbon monoxide is bound blank to hemoglobin

A

more tightly than oxygen

49
Q

HbS (sickle hemoglobin) has 2-4 more positive charges than HbA molecules

50
Q

heterozygotes of sickle cell anemia help guard against blank

51
Q

red blood cells deliver blank and remove blank from tissues

A

oxygen, co2

Dental Biochemistry (43 decks)

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