Blood's composition Flashcards
(26 cards)
what to do to a blood sample to visualise composition
centrifuge it
3 parts of blood you can see after it has been centrifuged
plasma (55%)
Buffy coat (<1%)
erythrocytes (45%)
what colour is plasma (least dense)
yellowy
2 things found in Buffy coat
platelets
leukocytes
what’s most dense blood component
erythrocytes
do men or women have less erythrocytes
women
3 e.gs of organic molecules found in plasma
proteins
glucose
lipids
how do leukocytes leave capillaries
via diapedesis (move through tissue spaces by ameboid motions and positive chemotaxis)
4 types of leukocytes (phagocytes)
phagocytes neutrophils eosinophils monocytes basophil
what do neutrophils kill
bacteria
what are eosinophils related to
parasites
what are basophils related to
allergies
what do t helper cells release to regulate other immune cells
cytokines and growth factors
2 cells that cause lysis of tumour cells and virally infected cells
cytotoxic t cells
natural killer cells
what cells secrete antibodies e.g. to kill COVID19
B cells
way of remembering leukocyte order in blood
N ever L et M onkeys E at B ananas
what’s the most abundant cell in blood (4.5million in male)
erythrocytes
if blood is sticky what can happen
stroke/ heart attack
what’s RBC life span
120 days
what’s RBC shape
why is this beneficial
biconcave disc
high SA:volume ratio - O2 and CO2 diffuse quickly
which 3 cell component do RBCs not have
why
nucleus
mitochondria
ribosomes
so more space for gas transport
how do rbc’s produce atp to maintain cell shape
anaerobically
how do rbc’s go through single branching capillaries
squeeze through , changing shape
stretch, bend and fold - spring back to original shape in large vessels
2 proteins in rbc membrane that make it biconcave
alpha and beta spectrin
actin
