Revision Flashcards

(13 cards)

1
Q

Haematocrit

A

volume of blood occupied by blood cells

expressed as fraction of total blood vol

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2
Q

normal range for Hct

A

0.35-0.54

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3
Q

diameter of platelets

A

2-3um

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4
Q

which leukocyte is present in the blood at lowest concentration

A

basophil

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5
Q

basophil

A

lobed nucleus
granulocyte
granules contain histamine and heparin

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6
Q

platelets

A
small 
disc shaped 
anuclear 
life span 8-10 days 
formed from fragments of cytoplasm shed from megakaryocytes in bone marrow in thrombopoiesis
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7
Q

typical MCV

A

90+/- 10% fL

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8
Q

typical normal red cell count in man

A

5.4x10(power 12)/L

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9
Q

monocytes

A

single kidney shaped nucleus
secrete inflammatory mediators
stimulate angiogenesis
in tissues - become macrophages, engulf microbes tissue debris and polymorphs

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10
Q

which organism belongs to prokaryotes

A

shigella

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11
Q

why do some membrane proteins have low mobility

A

their interaction with the cytoskeleton (actin) fences them

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12
Q

lists membranes in order of increasing percentage lipid content

A

inner mt membrane (25%)

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13
Q

direction of the net movement of K+ and Na+ through open channels in the membrane of a resting cell:

A

Na in - down electrochemical and conc grad

K out - down conc grad

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