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Systems Physiology > Blood > Flashcards

Blood Flashcards

1
Q

What are the main functions of blood?

A

1) Transportations of water, dissolved gases, nutrients, hormones, and metabolic wastes (nitrogen compounds, such as ammonia, urea, uric acid)
2) pH regulation and electrolyte balance
3) Prevention of fluid loss at inury site.
4) Defence against toxins and pathogens - immune system.
5) Stabilisation of body temperature.

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2
Q

Whats an electrolyte?

A

electrolyte = positively / negatively charged ions

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3
Q

What is our blood temperature?

A

37 - 37.6 degrees celcius

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4
Q

blood vs water?

A

5 tiems more viscous than water.

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5
Q

pH of blood?

A

Slightly alkaline (pH ≈ 7.38 - 7.42)

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6
Q

How much body weight does blood make up?

A

Healthy adults: ≈ 7 to 8 % of body weight

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7
Q

slide 6

A
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8
Q

slide 7

A
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9
Q

Different types of puncture?

A

Venipuncture (phlebotomy)
Arterial puncture
Capillary blood

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10
Q

What are the size of plasma proteins?

A

Large in size

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11
Q

Plasma proteins do not cross…

A

… capillary walls -> generate osmotic pressure.

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12
Q

What is the function of albumins?

A

transport fatty acids and various hormones

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13
Q

What is the function of globulins?

A

antibodies and transport hormones (alpha, beta, gamma).

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14
Q

Whats the function of fibrinogen?

A

blood clotting coagulation

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15
Q

slide 11

A
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16
Q

what are immunoglobulins also known as?

A

gammaglobulins

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17
Q

What are gammaglobulins/immunoglobulins?

A

antibodies

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18
Q

types of antibodies/immunoglobulins?

A

IgG
IgA
IgE
IgD
IgM

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19
Q

Which antibodies have heavy chains?

A

IgG
IgA
IgE
IgD

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20
Q

What is fibrinogen also known as?

A

AKA Factor I

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21
Q

fibrinogen is a type of…

A

…glycoprotein

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22
Q

how much fibrinogen is in plasma?

A

200 – 400 mg/dL (0.2 to 0.4 g/dL)

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23
Q

percent fibrinogen in plasma?

A

4% of total blood plasma

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24
Q

slide 15

A
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25
Q

Whats VLDL?

A

very low density lipoproteins

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26
Q

whats LDL?

A

low density lipoproteins

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27
Q

Whats HDL?

A

high density lipoprotein.

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28
Q

slide 16 + 17

A
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29
Q

Desirable range of cholesterol in adults?

A

<200 mg/dL

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30
Q

Range of borderline risk of atherosclerosis by cholesterol in adults?

A

200-239 mg/dL

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31
Q

Range of high risk of atherosclerosis by cholesterol in adults?

A

> /= 239 mg/dL

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32
Q

What is SpO2 ?

A

Peripheral Oxygen Saturation

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33
Q

What does pulse oximetry measure?

A

Hemoglobin saturation with oxygen

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34
Q

What are the limitations of pulse oximetry?

A

Gives no indication of:
- Ventilation
- base deficit
- carbon dioxide levels
- blood pH
- bicarbonate (HCO3−)
- In severe anaemia (blood will carry less total oxygen despite haemoglobin being 100%
saturated)
- Nail polish

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35
Q

Whats an erythrocyte?

A

red blood cell

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36
Q

WHere are erythrocytes produced?

A

bone marrow

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37
Q

Whats the function of erythrocytes?

A

Transport O2 / CO2

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38
Q

What are erythrocytes missing?

A

No mitochondria – use anaerobic metabolism

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39
Q

What kind of metabolism do erythrocytes use?

A

anaerobic metabolism

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40
Q

slide 24

A
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41
Q

how much haemoglobin (Hb) in healthy men?

A

Healthy men ≈ 14-17 g / dL

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42
Q

How much haemoglobin (Hb) in healthy women?

A

Healthy women ≈ 12-16 g/ dL

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43
Q

Carbon monoxide is known as…

A

… the suilent killer since is has no color or smell. Each year in britain about 50 peopke die and 200 are severely injured by carbon monoxide poisoning.

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44
Q

Shape of erythrocytes

A

biconcave discs

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45
Q

Features of biconcave discs?

A

– large surface area to volume ratio.
– flexibility when entering small capillaries and branches.

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46
Q

What are erythrocytes missing?

A

No nucleus
No ribosomes
No cell division / protein production

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46
Q

Whats the usual RBC count for men?

A

Men: 4.6 to 5.7 x 106 ± 300.000 / mm3

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46
Q

Whats the usual RBC count for women?

A

Women: 4.0 to 5.3 x 106 ± 300.000 / mm3

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46
Q

Men are at greater risk for cardiovascular disease than…

A

… pre-menopausal women

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47
Q

Once past the menopause, womens risk for cardiovascular disease is…

A

…similar to men

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47
Q

What is Haematocrit also known as?

A

Packed cell volume.

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48
Q

How does haematocrit work?

A

after centrifuge, blood moves to bottom, plasma moves to the top.

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48
Q

How can haematocrit be measured?

A

Can be measured using a ruler.

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49
Q

What should plasma be in males?

A

40-54%

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49
Q

What should plasma be in females?

A

37-47%

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51
Q

Effect of tobacco smoking on haematocrit?

A

Immediate effect = decreasing PO2 (pressure of oxygen). Results in increased blood pressure.

Also chronic effects, causing increased PCV.

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52
Q

Describe Compensatory erythrocyte modulation

A
  • Increased cell number
  • Increased viscosity
  • Increased vascular resistance
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53
Q

go look at slide 32

A
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54
Q

go look at slide 35

A
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55
Q

Where are Hematopoietic stem cells found?

A

located inside the bone marrow
(sternum, ribs, spine, etc)

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56
Q

What can Hematopoietic stem cells differentiate into?

A

differentiates into either CLP (Colony lymphoid
progenitor) or CMP (Colony
myeloid progenitor)

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57
Q

What are CLP?

A

Colony lymphoid progenitor

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58
Q

What are CMP?

A

Colony myeloid progenitor

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59
Q

What can CLP differentiate into?

A

1) T-Lymphocyte
2) B-Lymphocyte/Plasma cell

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60
Q

What can CMP differentiate into?

A

1) Erythrocyte
2) Megakaryocyte / Platelet
3) Basophil/Mast cell
4) Eosinophil
5) Neutrophil
6) Monocyte/Macrophage/Kupffer cell/Langerhans cell/Dendritic cell.

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61
Q

What are the two types of leukemia?

A
  • Lymphoblastic leukaemia
  • Myelogenous leukaemia
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62
Q

What is erythropoietin?

A

a hormone, which helps haematopoietic stem cells to differentiate into erythrocytes.

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63
Q

erythropoietin converts haematopoietic stem cells …

A

…into proerythroblasts

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64
Q

Where is erythropoietin produced?

A

Renal tubular epithelial cells.

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65
Q

What does erythropoietin do?

A

turns hematopoietic stem cells into proerythroblasts

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66
Q

After hematopoietic stem cells are turned into proerythroblasts by erythropoietin, what happens then to the proerythroblasts?

A

Proerythroblasts are turned into erythrocytes.

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67
Q

What happens after erythrocytes are formed from proerythroblasts?

A

Tissue oxygenation
(pH / pCO2 / pO2 / bicarbonate)

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68
Q

How is hypovolaemia, anaemia, low hb, low flow, and pulmonary disease decreased?

A

Tissue oxygenation
(pH / pCO2 / pO2 / bicarbonate

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69
Q

What is the process of colony myeloid progenitor (CMP) differentiatioin into erythrocytes?

A

Colony myeloid progenitor -> Proerythroblast -> Basophil erythroblast -> polychromatophil erythroblast -> orthochromatic erythroblast -> reticulocyte -> erythrocyte

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70
Q

Whats the 1st generation mutation of proerythroblast?

A

basophil erythroblast

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71
Q

Hb level of basophil erythroblast?

A

low Hb

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72
Q

Whats happening to polychromatophil erythroblasts Hb level?

A

Hb accumulation

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73
Q

Whats happening to orthochromatic erythroblasts Hb level?

A

Hb accumulation + nucleus condensation

74
Q

What changes occur in a reticulocyte erythrocyte?

A
  • Nucleus, Golgi, mitochondria expelled
  • Goes from bone marrow to capillaries -> diapedesis
75
Q

vitamin b12 is very important for the blood. Alot of it found in…

A

… organ meats such as liver

76
Q

What vitamins are found in mature erythrocytes?

A

Vitamin B12 (AKA cobalamin) & Folic acid

77
Q

What is vitamin b12 also known as?

A

cobalamin

78
Q

folic acid also importnat and found in …

A

… greens such as broccoli

79
Q

Whats the turnover of erythrocytes?

A

Rapid turnover (≈ 90 to 120 days)

80
Q

How does nutrition deficiency affect turnover rate?

A

nutrition deficiency = inadequate cell production. Affects turnover rate. Better diet = shorter turnover

81
Q

differentiation and maturation of erythrocytes is dependant on?

A

nutritional status.

82
Q

Where can iron come from?

A

iron can come from red meats, and also vegetables + plants

83
Q

What are the characteristics of iron-deficiency anaemia?

A
  • Impaired nuclear division & maturation &
    damaged cytoskeleton
  • Fragile membrane – short lifespan
84
Q

What does hypochromic mean?

A

hypochromic = low in colour

85
Q

How does blood look in iron deficiency anaemia?

A

1) Hypochromic microcytic cells
2) Poikilocytosis (variation in shape)
3) Anisocytosis (variation in size)

86
Q

What are the main clinical lab findings in iron-deficiency anaemia?

A

Parameter Change
Haemoglobin Down
Haematocrit Down
Red blood cell distribution width Up
Mean corpuscular volume Down
Erythropoietin Up (not always)
Ferritin Down
Serum iron Down
Serum transferrin Up
Total iron binding capacity Up

87
Q

What is the function of ferritin?

A

intracellular protein storing iron and releasing it in a controlled fashion. Act as
buffer to prevent iron deficiency / overload

88
Q

What is the function of transferrin?

A

iron-binding blood glycoprotein which controls levels of free iron in plasma

89
Q

What is pernicious anaemia also known as?

A

Biermer’s anaemia / Addison’s anaemia / Addison–Biermer anaemia

90
Q

Pernicious anaemia involves…

A

… a problem in the alimentary cannal causing causing problems with absorbing b12

91
Q

What and where is Pernicious anaemia?

A

Gastrointestinal tract – Vit B12 malabsorption

92
Q

what kind of atrophy happens in Pernicious anaemia?

A

Gastric mucosa atrophy -> incapacity to produce normal gastric secretion

93
Q

What is the function of gastric gland parietal cells?

A

Produces intrinsic factor which binds to B12

94
Q

What does intrinsic factor bind to?

A

binds to specific sites in the brush border membrane - ileum cells -> pinocytosis

95
Q

What does megaloblast mean?

A

an unmatured cell (blastic), but is still big (mega)

96
Q

What causes megaloblastic anaemia?

A

Folic acid deficiency

97
Q

What causes folic acid deficiency?

A

Poor nutrition
Coeliac disease

98
Q

What is enlarged erythrocytes called?

A

Macrocytosis

99
Q

What is Microcytic hypochromic anaemia?

A

smaller than normal red blood cells (microcytic), with less haemoglobin content, causing a paler than normal appearance (hypochromic).

100
Q

What is Microcytic hypochromic anaemia caused by?

A
  • iron deficiency resulting from poor nutrition, chronic blood loss.
  • rapid haemorrhage
  • chronic haemorrhage
  • small erythrocytes - haemoglobin deficiency.
101
Q

Aplastic anaemia is common in people suffering with…

A

…cancer

102
Q

People with aplastic anaemia have no…

A

… have no functional bone marrow.

103
Q

Aplastic anaemia can be caused by…

A

… gamma radiation / excessive X ray.

104
Q

Aplastic anaemia can result in…

A

…death within a few weeks.

105
Q

Define lytic.

A

lytic = lysis ; splitting apart

106
Q

What are the membranes of erythrocyte like in Haemolytic anaemia?

A

Fragile membranes

107
Q

What is Haemolytic anaemia?

A

red blood cells being destroyed (hemolysis) prematurely, resulting in low rbc count causing anemia.

108
Q

What can Haemolytic anaemia cause?

A

rupture of red blood cells through capillaries due to turbulence and pressure variation.

109
Q

In Haemolytic anaemia, red blood cells have a shortened…

A

… life span

110
Q

What are the three types of Haemolytic anaemia?

A
  1. Hereditary spherocytosis (Minkowski–Chauffard syndrome)
  2. Sickle-cell disease
  3. Erythroblastosis fetalis -> Haemolytic disease of the new-born
111
Q

What are the red blood cells like in Hereditary spherocytosis
(Minkowski–Chauffard syndrome) ?

A

the blood cells have a round / ball shape, making it harder to squeeze through gaps when delivering gases.

112
Q

Incidence rate of Hereditary spherocytosis (Minkowski–Chauffard syndrome)?

A

Incidence ≈ 1:5000 (Caucasians)

113
Q

Shape of erythrocytes in Hereditary spherocytosis (Minkowski–Chauffard syndrome)?

A

Sphere-shaped erythrocytes

114
Q

In Hereditary spherocytosis (Minkowski–Chauffard syndrome), erythrocytes have low resistance to…

A

…turbulence & pressure variation

115
Q

Hereditary spherocytosis (Minkowski–Chauffard syndrome) can cause what disorder?

A

splenomegaly

116
Q

what is splenomegaly?

A

enlargement of the spleen

117
Q

Clinical severity of Hereditary spherocytosis (Minkowski–Chauffard syndrome)?

A

Clinical severity varied

= MCS exhibits incomplete
penetrance in its expression

118
Q

What is sickle cell disease?

A

Autosomal recessive genetic blood disorder; a mutation that causes Haemoglobin S

119
Q

Whats the genetic condition that causes sickle cell disease?

A

HbS homozygous

120
Q

Whats is HbS homozygous referred to as?

A

HbSS

121
Q

What is HbS homozygous?

A

When an individual has two copies of the sickle cell gene from both parents.

122
Q

What are heterozygous carriers of sickle cell disease referred to as?

A

condition is referred to as HbAS

123
Q

What mutations result in sickle cell disease?

A

Mutation in 6th codon of β goblin gene

124
Q

What kind of mutation is sickle cell disease?

A

Point mutation in the β-globin chain of haemoglobin

125
Q

What happens to erythrocytes in sickle cell disease when exposed to low PO2 (oxygen pressure)?

A

Crystal-shape precipitation (polymerisation) when exposed to low PO2

126
Q

What is Erythroblastosis fetalis ?

A

Haemolytic disease of the new-born

127
Q

What happens in Erythroblastosis fetalis?

A

Rh+ Foetus erythrocytes -> attacked by Rh- mother’s antibodies

128
Q

What is Polychromasia (or polychromatophilia)?

A

the presence of a high number of immature erythrocytes (erythroblasts) in the blood, which were release prematurely from bone marrow.
May involve crenated cells.

129
Q

What does Polychromasia (or polychromatophilia) indicate?

A

an increased rate of red blood cell production

130
Q

What are crenated cells?

A

RBCs that have a spiky or abnormal shape because of changes in the membrane.

131
Q

What is Primary polycythaemia?

A

overproduction of red blood cells, white blood cells and also platelets in bone marrow.

132
Q

What is Primary polycythaemia also known as?

A

Polycythemia vera (PCV) or erythraemia

133
Q

Haematocrit in Primary polycythaemia?

A

Haematocrit = 60 to 70%

134
Q

What is the RBC count in Primary polycythaemia?

A

7 to 8 million / mm3

135
Q

What causes Primary polycythaemia?

A

Genetic aberration -> haemocytoblast cells don’t stop proliferating

136
Q

What are the affects of Primary polycythaemia on the blood?

A
  • Increased blood volume – ingurgitation
  • Increased viscosity
  • Decreased blood flow
137
Q

What is the RBC count in Secondary polycythaemia?

A

6 to 8 million / mm3

138
Q

Secondary polycythaemia causes…

A

… Chronic hypoxia

139
Q

What is Secondary polycythaemia also known as?

A

Physiological polycythaemia (naturally increased erythropoietin)

140
Q

What is Physiological polycythaemia ?

A

naturally increased erythropoietin

141
Q

What is hypoxia?

A

a deficinency of oxygen in the blood.

142
Q

What is blood doping?

A
  • Blood doping refers to when an athlete artificially increases the number of RBC in their body to enhance athletic performance. - This is typically done to improve endurance and oxygen delivery to muscles during intense exercise.
143
Q

Blood doping can cause …

A

… Congestive heart failure

144
Q

Do people living in the mountains have high or low oxygen levels?

A

Low. Can cause hypoxia.

145
Q

What are White blood cells also known as?

A

leukocytes

146
Q

What do leukocytes contain and not contain?

A

Contain nuclei but not Hb

147
Q

What do leukocytes defend against?

A

Defend body against pathogens

148
Q

What do leukocytes remove?

A

Removes toxins, wastes, and damaged cells.

149
Q

What do leukocytes detect?

A

detect chemical signs of damage.

150
Q

How many classes and groups of white blood cells?

A

5 classes, 2 groups

151
Q

What are the two groups of leukocytes?

A

Granular (granulocytes) and Agranular (agranulocytes)

152
Q

slide 63

A
153
Q

slide 65

A
154
Q

What kind of movement does neutrophil have?

A

amoeboid movement, allows them to phagocytose

155
Q

Neutrophils cas phagocytose what?

A

bacterial/viral toxins, degeneration products (cell debris)

156
Q

slide 66

A
157
Q

What does the complement system consist of?

A

Opsonization; Chemotaxis; Cell Lysis; Clumping of antigen
bearing agents

158
Q

in the blood are called monocytes. Once in the tissues, they are known as …

A

…macrophages

159
Q

Depending on where we find the monocytes, we can….

A

…. call them different names.

160
Q

Function of macrophages/monocytes?

A

detect and enulf viral poteins, dead cells, bacteria whichthought any soecific immunity

161
Q

slide 67

A
162
Q

slide 70

A
163
Q

What are Eosinophils ?

A

they are very weak macrophages

164
Q

What do eosinophils present?

A

chemotaxis.

164
Q

Number of eosinophils increase in …

A

…parasitic infections.

165
Q

What do eosinophils release?

A

adhere and release hydroplytic enzymes and highly reactive oxygen species (ROS).

166
Q

What are basophils ?

A

Large mastocytes (mast cells) in surrounding capillaries

167
Q

What do basophils release?

A

heparin and histamine

168
Q

72

A
169
Q

The two types of lymphocytes?

A

B lymphocytes and t lymphocytes.

170
Q

What are B lymphocytes responsible for?

A

production of antibodies (Humoral immunity Ab).

171
Q

What are T lymphocytes responsible for?

A

cellular immunity - the cell itself attacks the enemy (activated t lymphocytes) - go to front line of infection.

172
Q

Lymphocyte action depemds on…

A

…exposure to antigens (acquired immunity)

173
Q

73

A
174
Q

What is leukocytosis?

A

increased leukocytes.

175
Q

What can cause leukocytosis?

A

Generally infection, also cancer, drugs, chronic stress

176
Q

What is neutrophilia?

A

increased neutrophil granulocytes

177
Q

What can causes neutrophilia?

A

Acute infections, certain types of leukaemia, haemolysis, drug intoxication, etc.

178
Q

What is lymphocytosis?

A

increased lymphocytes

179
Q

What causes lymphocytosis?

A

Mumps, rubella, infectious mononucleosis, lymphatic leukaemia, pertussis, pyogenic infections in childhood, etc.

180
Q

What is monocytosis?

A

increased monocytes

181
Q

What causes monocytosis?

A

Chronic pyogenic infections, bacterial endocarditis, infectious hepatitis, monocytic leukaemia, rickettsial disease, etc.

182
Q

Whats eosinophilia?

A

increased eosinophils

183
Q

What can cause eosinophil?

A

Skin diseases, infestations, hay fever, asthma, allergic responses, Hodgkin disease.

184
Q

Whats basophilia?

A

increased basophils

185
Q

What could cause basophilia?

A

Leukaemia, advanced anaemia, malaria, lead poisoning, etc.

186
Q

Someone with eosinophil could be infested with….

A

….could be infested with parasites, on the surface of our bodyy and the inside of the body.

187
Q
A

Systems Physiology (6 decks)

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