QUIZ 3 Flashcards
All of the following are function of blood:
1) transports nutrients
2) wastes and gases
3) regulates pH
4) defends against infection
5) distribute heat
Red Blood Cells: are called \_\_\_\_\_\_\_\_ are \_\_\_\_\_\_ in shape have an average life span of \_\_\_ days most adults have around \_\_ \_\_\_\_\_\_ RBCs/µL of blood and the body produces about _ \_\_\_\_\_ per second.
are called erythrocytes
are biconcave in shape
have an average life span of 120 days
most adults have around 5 million RBCs/µL of blood
and the body produces about 3 million per second.
Hemoglobin
transports most of the O2 and about 23% of the CO2 between the tissues and the lungs.
White blood cells (leukocytes): include
include granulocytes:
neutrophils, eosinophils and basophils and agranulocytes:
monocytes and lymphocytes.
WBCs differ from RBCs in the following manner:
WBCs have nuclei: RBCs don’t; WBCshave MHC antigens: RBCs don’t and WBCs can leave the blood vessels; RBCs can’t.
Platelets
stop bleeding by plugging holes in blood vessels; release chemicals that makeblood clot; and are cell fragments rather than intact cells.
Stem cells for blood formation may be harvested from
1) the patient’s own marrow if their cancer is in remission
2) the marrow from the iliac crest of a closely matched donor
3) umbilical cord from a newborn whose parents have agreed to the donation.
Hemostasis is
a sequence of events that prevents the loss of blood from blood vessels; must be rapid, localized and carefully controlled; involves vascular spasm, platelet plug formation and coagulation; and can prevent hemorrhage if the damaged blood vessels are small.
The intrinsic pathway
1) takes longer to complete than the extrinsic pathway
2) involves platelet phospholipids and Ca2+;
An individual with type A blood has circulating
___ antibodies.
anti-B
