Exam #3 Bio 235 Athabasca Questions with Accurate Answers | Latest Update 2026 | Graded A+

Exam #3 Bio 235 Athabasca Questions with Accurate Answers | Latest Update 2026 | Graded A+ Trypsin - answer-digests proteins into peptides. Acts on inactive processors to produce chymotrypsin, carboxypeptidase and elastase Secretin - answer-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 - answer-Inhibits FSH secretion by anterior pituitary. Secreted by granulose cells of growing follicles and the corpus lute after ovulation Aldosterone - answer-increases reabsorption of Na and water by the kidneys. this water reabsorption increases total blood volume and increases blood pressure Antidiuretic hormone (ADH) - answer-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 - answer-Raises blood pressure by increasing systemic vascular resistance potent vasoconstricter stimulates secretion of aldosterone Thrombin - answer-converts soluble fibrinogen into insoluble fibrin which forms the threads of the clotLingual Lipase - answer-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 - answer-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 - answer-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 - answer-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 - answer-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 - answer-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 - answer-AlbuminsGlobulins Fibrinogen GnRH - answer-stimulates gonadotrophs in the anterior pituitary to increase secretion of luteinizing hormone (LH) and follicle stimulating hormone (FSH) Controls the ovarian uterine cycles Blastomere - answer-the progressively smaller cells produced by cleavage P Wave - answer-a small upward deflection. Represents atrial depolarization which spreads from the SA node through contractile fibres in both atria QRS complex - answer-a downward deflection, continues as a large upright, triangular wave, ends as a downward wave. represents rapid ventricular depolarization T wave - answer-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 - answer-allow muscle action potentials to conduct from one muscle finer to its neighbours all the entire myocardium of the atria or the ventricles to contract as a single, coordinated unit Vascular spasm - answer-When arteries are damaged, the circularly arranged smooth muscle in their walls contract immediately. This reduces blood loss Platelet plug formation - answer-Prevents blood loss in small vessels. Fibrin threads reinforce the clot/plug and make it quite tight.Blood clot - answer-a series of chemical reactions that culminate in formation of fibrin threads. the blood clot is a gel that contains formed elements of the blood entangled in fibrin threads. Vasoconstriction - answer-decrease in the diameter of the lumen of a vessel Ductus deferens - answer-convey sperm during sexual arousal from the epididymis to the urethra by peristaltic contractions can store sperm for several months Post absorptive state - answer-absorption of nutrients from the GI tract is complete and energy needs must be met by fuels already in the body. This function is important for maintaining a steady blood glucose level Absorptive state - answer-ingested nutrients are entering the bloodstream and glucose is readily available for ATP production. Insulin dominates this state Types of birth control - answer-Complete abstinence surgical sterilization non-incisional sterilization hormonal methods IUD spermicides barrier methods periodic abstinence Mechanisms of heat transfer - answer-Conduction Convection Radiation Evaporation Hormones that regulate digestive activities - answer-GastrinSecretin Cholecystokinin (CCK) Parts of the small intestine - answer-Duodenum Jejunum Ileum Pancreas - answer-secretes pancreatic juice from acini portion and glucagon, insulin, somatostatin and pancreatic polypeptide from the pancreatic islets Types of shock - answer-Hypovolemic- decreased blood volume cardiogenic -poor heart function vascular- inappropriate vasodilation obstructive-obstruction of blood flow Deglutition - answer-The act of swallowing Deglutition stages - answer-Voluntary stage-bolus is passed into oropharynx pharyngeal stage-involuntary passage of bolus to esophagus esophageal stage-involutary passage of bolus through esophagus into the stomach Spermatogenesis - answer-The process by which the seminiferous tubules produce sperm Zona pellucida - answer-A clear glycoprotein layer between the primary oocyte and the granulosa cells Female reproductive cycle - answer-menstrual phase preovulatory phase ovulation post ovulatory phaseAgglutinins - answer-antibodies in blood plasma