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Exam #3 Bio 235 Athabasca
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Exam #3 Bio 235 Athabasca
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EXAM #3 BIO 235 ATHABASCAQUESTIONS WITH COMPLETE
SOLUTION
v Trypsin - digests proteins into peptides. Acts on inactive processors to produce chymotrypsin,
carboxypeptidase and elastase
Secretin - Stimulates the flow of pancreatic juice rich in bicarbonate. inhibits secretion of gastric juice,
enhances effects of CCK and promotes normal growth of pancreas. Buffering ion acid in chyme
Inhibin - Inhibits FSH secretion by anterior pituitary. Secreted by granulose cells of growing follicles and
the corpus lute after ovulation
Aldosterone - increases reabsorption of Na and water by the kidneys. this water reabsorption increases
total blood volume and increases blood pressure
Antidiuretic hormone (ADH) - is releases in response to dehydration or decreased blood volume. Causes
vasoconstriction which increases blood pressure.
Promotes movement of water from lumen of kidney tubules into the bloodstream
enhances water reabsorption by kidneys
Angiotensin II - Raises blood pressure by increasing systemic vascular resistance
potent vasoconstricter
stimulates secretion of aldosterone
Thrombin - converts soluble fibrinogen into insoluble fibrin which forms the threads of the clot
Lingual Lipase - acts on as much as 30% of the dietary triglycerides and converts them to simpler fatty
acids and diglycerides.
Becomes activated in the acidic environment of the stomach thus starts working after food has been
swallowed
Salivary Amylase - A digestive enzyme that acts on starch
activated by chloride ions in saliva
breaks start down into maltose, maltatroise and a-dextrin
continues to break down food after it has been swallowed for about an hour
Basophil - release granules that contain heparin, histamine and serotonin which all intensify
inflammatory reactions and are involved in allergic reactions
, similar function as mast cells
.5-1% of all WBC
Neutrophils - release several chemicals to destroy a pathogen
contain defensins which poke holes in microbe membranes
Participate in destruction of bacteria
Phagocytosis
60-70% of all WBC
Monocyte - Arrive in larger numbers and destroy more microbes. Once arriving they enlarge and
differentiate into wandering macrophages, which clean up cellular debris and microbes by phagocytosis
after an infection
3-8% of all WBC
Eosinophil - Believed to release enzymes such as histaminase that combat the effects of histamine and
other substances involved in inflammation during allergic reactions
phagocytize antigen-antibody complexes and are effective against parasitic worms
2-4% of all WBC
Plasma proteins - Albumins
Globulins
Fibrinogen
GnRH - stimulates gonadotrophs in the anterior pituitary to increase secretion of luteinizing hormone
(LH) and follicle stimulating hormone (FSH)
Controls the ovarian uterine cycles
Blastomere - the progressively smaller cells produced by cleavage
P Wave - a small upward deflection. Represents atrial depolarization which spreads from the SA node
through contractile fibres in both atria
QRS complex - a downward deflection, continues as a large upright, triangular wave, ends as a
downward wave.
represents rapid ventricular depolarization
T wave - A dome-shaped upward deflection
ventricular depolarization and occurs as the ventricles are starting to relax.
Smaller QRE complex causes depolarization occurs more slowly than depolarization
Gap junctions - allow muscle action potentials to conduct from one muscle finer to its neighbours
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