Revision Flashcards
(13 cards)
Haematocrit
volume of blood occupied by blood cells
expressed as fraction of total blood vol
normal range for Hct
0.35-0.54
diameter of platelets
2-3um
which leukocyte is present in the blood at lowest concentration
basophil
basophil
lobed nucleus
granulocyte
granules contain histamine and heparin
platelets
small disc shaped anuclear life span 8-10 days formed from fragments of cytoplasm shed from megakaryocytes in bone marrow in thrombopoiesis
typical MCV
90+/- 10% fL
typical normal red cell count in man
5.4x10(power 12)/L
monocytes
single kidney shaped nucleus
secrete inflammatory mediators
stimulate angiogenesis
in tissues - become macrophages, engulf microbes tissue debris and polymorphs
which organism belongs to prokaryotes
shigella
why do some membrane proteins have low mobility
their interaction with the cytoskeleton (actin) fences them
lists membranes in order of increasing percentage lipid content
inner mt membrane (25%)
direction of the net movement of K+ and Na+ through open channels in the membrane of a resting cell:
Na in - down electrochemical and conc grad
K out - down conc grad