19.3 RBC Flashcards
1
Q
red blood cells contain the oxygen carrying protein
A
hemoglobin
2
Q
RBC plasma membrane
A
strong and flexible which allows them to deform without rupturing as they squeeze through narrow blood capillaries
3
Q
RBCs lack
A
a nucleus and other organelles and can neither reproduce nor carry on extensive metabolic activity
4
Q
the cytosol of RBCs contain
A
hemoglobin molecules - synthesized before loss of the nucleus during RBC production - constitute about 33% of cells weigh
5
Q
how long do RBCs live
A
120 days because of the wear and tear their plasma membranes undergo as they squeeze through blood capillaries
6
Q
plasma membrane becomes more fragile with age and cells are more likely to
A
burst as they squeeze through narrow channels in the spleen
7
Q
A
