Physioex Unit 1 Flash Cards

Topics: Action potential, Red blood cell, Cortisol Pages: 6 (2057 words) Published: February 23, 2011
PhysioEx Lab Unit 1
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2hr OGTT level aboe 200mg/dl: confirms diabetes dx
2hr. OGTT level b/w 140-200mg/dl: impaired glucose tolerance absolute refractory period: period when cell membrane is totally insensitive to additional stimuli, regardless of the stimulus force applied. ACTH: hormone released by the anterior pituitary. stimulated by a hypothalamic hormone, CRH, inhibited by cortisol. Action Potential: large reversal of the membrane polarity that occurs when the membrane depolarizes to threshold. active transport: the movement of molecules across a membrane that requires the expenditure of cellular energy (ATP) Addison's disease (primary adrenal insufficiency): low cortisol level, high ACTH level anemia: low count in RBC

anisocytosis: abnormal sizes of RBCs
avg. blood volume for females: 27.5ml/lb
avg. blood volume for males: 30ml/lb
conductivity: ability to transmit an impulse (to take the neural impulse & pass it along the cell membrane) convert lbs to gms to find out gm wt. of blood: [ weight(lbs) x 454g/lb ]/ 12 = gm wt. of blood cortisol: hormone secreted by the adrenal cortex, is key to the long-term regulation of stress. stimulated by ACTH. CRH: hormone that stimulates ACTH secretion, inhibited by cortisol cushing's disease (secondary hypercortisolism): high cortisol level, high ACTH level cushing's syndrome (primary hypercortisolism): high cortisol level, low ACTH level depolarization: reversal of membrane potential due to influx of sodium ions. Describe the process of excitation-contraction coupling.: An AP in a motor neuron triggers the release of Ach. Ach diffuses into the sarcolemma & binds to receptors in the muscle cell. The resulting change in ion permeability triggers a depolarization of the plasma membrane called an end plate potential. The end plate potential triggers a series of events that results in the contraction of a muscle cell. Describe the three phases of a muscle "twitch": Latent period: period of time that elapses b/w the generation of an AP in a muscle cell & the start of a contraction. Contraction phase: a period of time that starts at the end of the latent period & ends when muscle tension peaks. Relaxation phase: period of time from peak tension until the end of muscle contraction. diffusion: the movement of molecules from an area of higher concentration to an area of lower concentration as a result of random thermal motion Does the addition of ether to the nerve cause any permanent alteration in neural response?: No, has no lasting effect. Ether impairs the ability of nerve fibers to function. (Blocks nerve transmission) Equation to calculate the original number of RBCs in 1 cu mm (method 1): cell count from all 5 squares x dilution factor/ # of squares counted x vol. of individual square Equation to calculate the original number of RBCs in 1 cu mm (method 2): cell count ( dilution x area x depth) facilitated diffusion: the movement of molecules across a selectively permeable membrane with the aid of specialized transport proteins fatigue: decline in a muscle's ability to maintain a constant force of contraction after prolonged, repetitive stimulation. FPG value b/w 110-126mg/dl: dx as impairment or borderline impairment in glucose reading FPG value greater than or equal to 126mg/dl: dx as diabetes in glucose reading FPG value less than 110mg/dl: dx as normal range in glucose reading glucose standard curve: point of reference for converting optical density readings. Gower's/Hayem's solution: diluent for RBC

hemocytometer slide: forms a roof that is 1/10 mm above the grid surface high ACTH: greater than or equal to 80 pg/ml
high cortisol: greater than or equal to 23mcg/dl
hormonal: hormone released by another endocrine gland
hormones are released in 3 ways: hormonal, neural, or humoral How can concentration of water in a solution be...
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