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Physiology Unit 5
Endocrine, Blood, Lymph
130
Physiology
Undergraduate 2
04/01/2011

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Term
Where does blood get rid of CO2 and wastes?
Definition
Lungs (CO2) and skin/kidneys (wastes)
Term
what does blood transport?
Definition
O2 and CO2
nutrients and wastes
hormones
heat
Term
how does blood protect us?
Definition
protect against disease (WBC)
clotting (prevents excessive blood loss)
Term
What does blood regulate in our body?
Definition
pH (by using buffers)
body temp
water content of cells (BCOP)
Term
blood pH
Definition
7.35-7.45
Term
what transports most substances in blood?"
Definition
plasma
Term
pathway for extracellular fluid
Definition
plasma, interstitial fluid, lymph
Term
antibodies (proteins) in the blood (also connected to lymph)
Definition
globulins
Term
antibodies (proteins) in the blood (also connected to lymph)
Definition
globulins
Term
proteins that maintain blood colloid osmotic pressure/diffusion control across capillary walls
Definition
albumins
Term
what do fibrinogens do?
Definition
aid in blood clotting
Term
hemopoiesis - defined
Definition
formation of blood cells
Term
where does hemopoiesis take place? what kind of stem cells does it work with? what influences end product?
Definition
made in red bone marrow; contains pluripotent cells; responds to specific hormones to form all bl cells
Term
how many hemoglobin molecules on RBC? how many O2 on each hemoglobin?
Definition
250 million; 4
Term
how many hemoglobin molecules on RBC? how many O2 on each hemoglobin?
Definition
250 million; 4
Term
what kind of blood cell carries O2, some CO2 and regulates bl pressure?
Definition
RBC
Term
what does it mean that RBC are not metabolically active?
Definition
they don't use any of the O2 they carry
Term
where are most old RBC's broken down or phagocytized? if that is taken out, where is that process diverted to?
Definition
spleen; liver and red bone marrow
Term
how many RBC are created and dying every second?
Definition
2 million
Term
heme + globin =
Definition
hemoglobin
Term
part of hemoglobin that carries iron; and thus carries the O2 in the cell
Definition
heme
Term
O2 carrying protein in RBC
Definition
hemoglobin
Term
RBC production in red bone marrow
Definition
erythropoiesis
Term
RBC production in red bone marrow
Definition
erythropoiesis
Term
Fe3+ plus erythropoietin + Vit B12 + globin makes
Definition
RBC's
Term
these cells - the main function is to fight disease
Definition
WBC's
Term
response to stress that increases WBC numbers
Definition
leukocytosis
Term
decreased WBC numbers
Definition
leukopenia
Term
blood cell that has life span of few hours (if active infection) to days to your entire life
Definition
WBC's
Term
WBC that gets to infection site first; phagocytes, but not very hearty; make up 60-70% of WBC
Definition
neutrophils
Term
what attracts WBC's to infection site?
Definition
chemotaxis - chemicals released at site by dying cells
Term
second to arrive at infection site...turn into MACROPHAGES once there, never leave
Definition
monocytes
Term
WBC used for diagnosis...involved in inflammation and allergic reaction
(looks like pepper...allergic reaction)
Definition
basophils
Term
work with basophils to reduce allergic reaction, and also fights parasitic worms
Definition
eosinophils
Term
Lymphocytes that create memory and secretes antibodies
Definition
B cells
Term
Lymphocytes that create memory and secretes antibodies
Definition
B cells
Term
what do T cells attack?
Definition
viruses, cancer cells, transplanted organs, involved in transfusion reactions
Term
cell fragments that form plugs to promote clot formation; last 5-9 days
Definition
thrombocytes (platelets)
Term
Type A has ___ antigens
Definition
A antigens
Term
blood type and Rh factor are genetically determined
Definition
TRUE
Term
condition where - if wrong blood type is given, hemolysis occurs bc body produces antibodies against incompatible blood types
Definition
transfusion reaction
Term
AB+
Definition
universal recipient
Term
universal donor
Definition
O-
Term
Rh factor present on RBC, so person is
Definition
Rh+
Term
Rh factor most important for mom who is Rh ___
Definition
negative
Term
iron carried in blood by ___; why does it need carrier?
Definition
transferrin; bacteria will eat it
Term
RBC broken down in spleen or liver gives off ___ and ____
Definition
heme (iron) and globin (proteins)
Term
Heme turns into Fe3+, traveling first to ___; then to ____ to be part of making more _____
Definition
liver, red bone marrow, RBC
Term
Part of Heme also breaks down into ____; which turns into ____ and goes to liver
Definition
biliverdin; bilirubin
Term
Bilirubin travels to ___ after leaving liver; when bacteria is added, it becomes ___
Definition
small intestine; Urobilinogen
Term
Urobilinogen - describe to pathways out of body
Definition
to kidney, becomes Urobilin, then urine

becomes Stercobilin and feces
Term
globin (after being released from dying RBC) turns into?
Definition
amino acids; reused for protein synthesis
Term
condition where there is not enough Fe3+ in bone marrow, so hemoglobin isn't carrying enough O2
- often tired, may need to cough to get O2 in quickly, harder to breathe
Definition
iron-deficiency anemia
Term
RBC's live for 120 days
Definition
t
Term
condition where liver working not well enough, bilirubin gets into blstream
Definition
jaundice
Term
pathway of heme
Definition
Heme -- Fe3+ and Transferrin -- liver -- red bone marrow -- part of new RBC
Term
all WBC's have this identity marker protruding from their cell membrane; unique to everyone (except ID twins)...all cells but RBC's have this
Definition
Major Histocompatibilty Complex
Term
complex process that causes bleeding to stop
Definition
hemostasis
Term
complex process that causes bleeding to stop
Definition
hemostasis
Term
cellular O2 deficiency bc of higher altitudes, circulatory problems, anemia
Definition
hypoxia
Term
stimulates kidneys to release erythropoeitin, to make more RBCs to bring more 02 to to body tissues
Definition
hypoxia
Term
thrombopoietin turns pluripotent cells into ____ that splinter into ___.
Definition
megakaryocytes
platelets
Term
fx of platelets
Definition
release chemicals to promote clotting; stop blood loss by forming plug
Term
percentage of T cells actually make cut when maturing in thymus gland?
Definition
25%
Term
low count of neutrophils might mean?
Definition
Vit B12 deficiency, drug toxicity, systemic lupus, radiation exposure
Term
high count of neutrophils could mean what?
Definition
bacterial infection, burns, stress, inflammation
Term
high count of lymphocytes might mean?
Definition
viral infection, some leukemias
Term
Low count lymphocytes may indicate
Definition
prolonged illness, immunosuppression, tx with cortisol
Term
someone presents with viral or fungal infection, TB, some leukemias, or other chronic disease - which WBC count is high?
Definition
monocytes
Term
Low count monocytes means:
Definition
bone marrow suppression, tx with cortisol
Term
High eosinophils and basophils could present as
Definition
allergic reaction
Term
Pregnancy, ovulation, stress or hyperthyroidism would mean low count of what WBC?
Definition
basophils
Term
Hypothyroidism increases # of which WBC?
Definition
basophils
Term
parasitic infection or autoimmune disease would increase count of which WBC?
Definition
eosinophils
Term
what percentage lymphocytes are in bloodstream? where are rest?
Definition
2%;

skin, lungs, lymph nodes, spleen
Term
process by which WBC leave blood stream, they roll along, stick to, then squeeze thru fenestrations in dilated bl vsls
Definition
emigration
Term
chemicals released by microbes and inflamed tissues that attract phagocytes
Definition
chemotaxis
Term
once pathogen enters deeper tissues, how do WBCs fight them off?
Definition
phagocytosis or immune responses
Term
Myeloid stem cells produce
Definition
RBC, megakaryocytes (platelets), eosinophils, basophils, neutrophils, monocytes (macrophages)
Term
B cells and T cells stem from
Definition
lymphoid stem cell
Term
neutrophils make up what % of WBCs?
lymphocytes make up what % of WBCs?
monocytes make up what % of WBCs?
eosinophils make up what % of WBCs?
basophils make up what % of WBCs?
Definition
60-70%
20-25%
3-8%
2-4%
0.5-1%
Term
primary lymphatic organs (where stem cells div and become immunocompetent)
Definition
thymus, bone marrow
Term
2ndry lymphatic organs - where fight happens?
largest mass lymph tissue?
Definition
spleen, lymph nodes, lymphatic nodules

SPLEEN
Term
where do T cells mature?
Definition
thymus
Term
where are lymphatic nodules located? (with MALT)
Definition
mucous membranes of GI tract, urinary, reproductive tract, respiratory tract
Term
what is fx of white pulp in spleen?
red pulp?
Definition
white: immunology
red: RBC getting rid of
Term
fx of lymphatic system -3
Definition
drain excess interstitial fluid
transport dietary lipid (bc of fenestrations)
carry out immune response
Term
lymphatic vessels - resemble veins, how different though?
Definition
thinner walls, more valves
Term
lymphatic vsls return lost plasma proteins to
Definition
blood stream
Term
which 2 pumps that aid venous return also aid lymphatic mvmt
Definition
skeletal muscle pump
respiratory pump
Term
fxl part of lymph node called
Definition
parenchyma
Term
lymph flows 1 direction only in node - T or F
Definition
TRUE
Term
pathway of lymph thru node
Definition
enters thru many afferent vsls, leaves thru 1 or 2 efferent vsls - cleaned out, with activated T cells, antibodies
Term
how many lymph nodes in body
Definition
600
Term
lymph nodes are filter, macrophages and immune response filter lymph - T or F
Definition
True
Term
how does skin provide 1st line defense?
Definition
keratinized cells, staggered
Term
chemical factors of 1st line of defense
Definition
mucous membranes, oil glands, sweat, gastric juices, vaginal secretions, urine, feces, tears (lysozymes), nasal secretions
Term
mechanical factors of skin as 1st line of defense
Definition
cilia, nose hairs, keratinized -tough cells, staggered cells,
Term
how do interferons work?
Definition
prevent replication of neighboring uninfected cells
Term
how do complement proteins work? where are complement proteins?
Definition
complement/enhance certain immune responses - causes cytolysis, promotes phagocytosis, contrib to inflammation
-- in blood plasma or plasma membrane
Term
what do NK cells use to attack?
Definition
perforin
granzymes (induces apoptosis)
Term
pain, swelling, heat, redness indicate
Definition
inflammation
Term
3 stages of inflammation
Definition
vasodilation, emigration, tissue repair
Term
phagocytosis in 2nd line of defense comes thru
Definition
macrophages, neutrophils - bc of chemotaxis
Term
3 antimicrobial substances in 2nd line of defense
Definition
iron-binding proteins
complements
interferons
Term
kills microbes hopefully, resets hypothalamus, raises metabolic processes - which aids in tissue repair
Definition
fever
Term
5 aspects of 2nd line of immune defense
Definition
antimicrobial substances
NK cells
phagocytosis
inflammation
fever
Term
fx inflammation
Definition
dispose of microbes, prevent spread, aid in tissue repair
Term
vasodilation of bl vsls allows for ____; 2 fx
Definition
emigration -
brings supplies, removes debris
Term
pocket of dead phagocytes and damaged tissue
Definition
pus
Term
prostaglandins released by damaged cells, intensify what? also stimulate ___
Definition
kinins and histamine (pain-associated); may also stimulate emigration
Term
ability of body to defend itself against specific Ag
Definition
adaptive immunity
Term
adaptive immunity different than innate because it has memory and ___
Definition
specificity
Term
ability to carry out adaptive immune resonse - have Ag receptors to ID specific Ag
Definition
immunocompetence
Term
Helper T cells aid in which two types of immunity
Definition
cell-mediated and Ab-mediated
Term
process by which lymphocyte proliferates and differentiates in response to specific Ag
Definition
clonal selection
Term
how many different epitopes do we have?
Definition
at least a billion
Term
epitope or antigenic determinant
Definition
- small portion of large Ag -
what part of Ag provokes immune response
Term
ability of an Ag to provoke immune response is called it's
Definition
immunogenicity
Term
ability of Ag to react specifically with Ab it provoked
Definition
reactivity
Term
when ___ cell sees Ag, it creates Ab and Ab goes after Ag
Definition
B cell
Term
When T cell sees Ag, what does it do?
Definition
goes after it itself
Term
T cells need to see processed Ag before it goes after it - T or F
Definition
TRUE
Term
B cells can bind and recognize Ag - T or F
Definition
True
Term
antigen presentation - when ___ is presented on cell membrane?
Definition
Antigen-MHC complex
Term
how are CD8 cytotoxic T cells different than NK cells? what do they use to kill cells?
Definition
NK nonspecific, T cells have specificity;
use perforin, granulysin - cause cytolysis
granzymes - induce apoptosis
Term
immunological surveillance - what cells working together to target tumor Ags on cancer cells
Definition
cytotoxic T cells, macrophages, NK cells
Term
Ab combine specifically with ___ of Ag that triggered its production
Definition
epitope
Term
what can Ab do?
Definition
neutralize Ag, immobilize bacteria, agglutinate Ag or precipitate Ag, enhance phagocytosis, activate complement
Term
Recog of self means there is what in cell? Non self lacks this
Definition
MHC
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