BIOM 525 Quiz 1.docx solved solution docs 2020

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BIOM 525 Quiz 1.docx solved solution docs 2020 • Question 1 1 out of 1 points The osmolarity of a solution of 50 mmol/L CaCl2 is closest to the osmolarity of which of the following: ... • Question 2 1 out of 1 points Which of the following neurotransmitters would be inactivated by peptidases: • Question 3 1 out of 1 points Solution A contains 100 mmol/L glucose and Solution B contains 50 mmol/L NaCl. Assume that gNaCl is 2.0, σglucose is 0.5, and σNaCl is 0.8. If a semipermeable membrane separates the two solutions, what is the direction of water flow across the membrane? • Question 4 1 out of 1 points Multi-unit smooth muscles are commonly found in these tissues except • Question 5 0 out of 1 points Bisects the bare zone and contains darkly staining proteins that link the central portions of the thick filaments together.What component of the sacromere does this describe? • Question 6 1 out of 1 points Which of these statements about the cell membrane is inaccurate? • Question 7 1 out of 1 points Which of these ions has a higher intracellular to extracellular concentration ration in humans? • Question 8 0 out of 1 points Which of these conditions results in electrolyte abnormality(ies) that cause(s) diminished excitability of neuronal cells? • Question 9 0 out of 1 points Which of these neurotransmitters is majorly inhibitory in its effect on neurotransmission? • Question 10 0 out of 1 points The concentration of osmotically active particles in a solution expressed as milliosmoles per liter is called; • Question 11 1 out of 1 points The following classes of drugs are contraindicated in a patient with myasthenia gravis except: • Question 12 1 out of 1 points Which of these describes the proper temporal sequence in the excitation-contraction coupling of skeletal muscles? • Question 13 1 out of 1 points The diffusion potential that exactly balances or opposes the tendency for diffusion down the concentration difference is called; • Question 14 0 out of 1 points Which of these statements about active transport is inaccurate? • Question 15 0 out of 1 points It is a large molecular weight protein that extends from the M lines to the Z disks and is associated with thick filaments.Which skeletal muscle protein does this describe? • Question 16 0 out of 1 points Which of these neurotransmitters is secreted by the adrenal medulla but not adrenergic neurons? • Question 17 0 out of 1 points Which of these statements about driving force is not correct? • Question 18 1 out of 1 points Which of these statements about refractory period is not true? • Question 19 1 out of 1 points They contain the thin (actin) filaments, intermediate filamentous proteins, and Z disks. They have no thick filaments.What component of the sacromere does this describe? • Question 20 0 out of 1 points Which of these parameters is not included in the description of permeability (P)? • Question 21 1 out of 1 points It is located in the center of each sarcomere. There are no thin filaments here; thus there can be no overlap of thick and thin filaments or cross-bridge formation in this region. What component of the sacromere does this describe? • Question 22 1 out of 1 points Which of these may serve as a sensor for the gates of physiological ion channels? • Question 23 1 out of 1 points Which of these statements about GABA-mediated neurotransmission is not true? • Question 24 1 out of 1 points If the intracellular [Ca 2+ ] is 10 −7 mol/L and the extracellular [Ca 2+ ] is 2 × 10 −3 mol/L, at what potential difference across the cell membrane will Ca 2+ be at electrochemical equilibrium? Assume that 2.3RT/F = 60 mV at body temperature (37°C). • Question 25 0 out of 1 points Which of these mechanisms will be least helpful in controlling a patient's recurrent facial muscle spasms? • Question 26 0 out of 1 points Which of these is not a possible cause of muscle fatigue? • Question 27 1 out of 1 points Which of these correctly describes osmosis? • Question 28 1 out of 1 points This term is used to describe the amount of charged (ionized) solute and is the number of moles of the solute multiplied by its valence; • Question 29 0 out of 1 points Low-affinity but high-capacity Ca++-binding protein in the SR. This describes _________? • Question 30 1 out of 1 points Which of these statements does not accurately describe synapses? • Question 31 1 out of 1 points Which of these is accurate about the cell membrane proteins? • Question 32 1 out of 1 points This term describes two solutions with an equal amount of osmotically active particles is; • Question 33 1 out of 1 points Attaches the troponin complex to tropomyosin.Which skeletal muscle protein does this describe? • Question 34 1 out of 1 points Which of these factors is responsible for initiating the excitation-contraction coupling in smooth muscles? • Question 35 1 out of 1 points Which of these neurotransmitters is not a biogenic amine? • Question 36 0 out of 1 points Which of these conditions will result in an increased rate of membrane diffusion? • Question 37 1 out of 1 points Which of these cells is not present in the central nervous system? • Question 38 1 out of 1 points Which of these statements is not true about graded potentials? • Question 39 0 out of 1 points Which of these enzymes promotes smooth muscle relaxation? • Question 40 0 out of 1 points Which of these is an example of a local physiological control system; • Question 41 1 out of 1 points The ability to maintain a relatively constant internal environment, despite any changes in the external environment is; • Question 42 1 out of 1 points Which of these is a component of a reflex pathway? • Question 43 1 out of 1 points The neurotransmitter released at the neuromuscular junction that stimulates the motor end-plate in skeletal muscles is; • Question 44 1 out of 1 points Which of these statements about the physiology skeletal muscle contraction is not accurate? • Question 45 0 out of 1 points Which of these statements about smooth muscles is not correct? • Question 46 0 out of 1 points Which of these factors is likely to affect the movement of ions across the cells membrane? • Question 47 0 out of 1 points Which of these will most likely hyperpolarize the membrane of excitable tissues? • Question 48 1 out of 1 points Which of these proteins is described as the thin filament in skeletal muscles? • Question 49 0 out of 1 points These neurotransmitters are largely excitatory except; • Question 50 0 out of 1 points A somatic motor neuron and all the muscle cells it innervates describes a; [Show More]

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