Physiology exam 1.docx questions and answers working test docs 2020

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Physiology exam 1.docx questions and answers working test docs 2020 Question 1 1 out of 1 points A somatic motor neuron and all the muscle cells it innervates describes a; Ques... tion 2 1 out of 1 points The neurotransmitter released at the neuromuscular junction that stimulates the motor end-plate in skeletal muscles is; Question 3 0 out of 1 points Which of these statements is not true about graded potentials? Question 4 1 out of 1 points Which of these enzymes promotes smooth muscle relaxation? Question 5 1 out of 1 points Which of these proteins is described as the thin filament in skeletal muscles? Question 6 1 out of 1 points Which of these cell types is wrongly paired with its function? Question 7 1 out of 1 points Which of these factors is likely to affect the movement of ions across the cells membrane? Question 8 0 out of 1 points Which of these do you expect to find on the motor end-plate membrane of skeletal muscles? Question 9 1 out of 1 points Which of these is a component of a reflex pathway? Question 10 1 out of 1 points Which of these statements about the physiology skeletal muscle contraction is not accurate? Question 11 1 out of 1 points Which of these is an example of a local physiological control system; Question 12 0 out of 1 points The ability to maintain a relatively constant internal environment, despite any changes in the external environment is; Question 13 1 out of 1 points The sarcoplasmic reticular membrane protein responsible for the release of calcium ions into the cytosol is; Question 14 1 out of 1 points Which of these statements about smooth muscles is not correct? Question 15 1 out of 1 points Which of these conditions will result in an increased rate of membrane diffusion? Question 16 1 out of 1 points Which of these types of membrane transport is described as a secondary active transport? Question 17 0 out of 1 points Which of these statements about driving force is not correct? Question 18 0 out of 1 points Which of these mechanisms will be least helpful in controlling a patient's recurrent facial muscle spasms? Question 19 0 out of 1 points Which of these statements describes a physiologic significance of the differences in the composition of the ICF and the ECF? Question 20 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 21 1 out of 1 points Multi-unit smooth muscles are commonly found in these tissues except Question 22 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 23 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 24 1 out of 1 points Which of these statements does not accurately describe synapses? Question 25 0 out of 1 points Which of these conditions results in electrolyte abnormality(ies) that cause(s) diminished excitability of neuronal cells? Question 26 1 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 27 1 out of 1 points Which of these describes the hyperpolarizing afterpotential? Question 28 1 out of 1 points Which of these is accurate about the cell membrane proteins? Question 29 1 out of 1 points Which of these is not a possible cause of muscle fatigue? Question 30 1 out of 1 points Which of these neurotransmitters is secreted by the adrenal medulla but not adrenergic neurons? Question 31 1 out of 1 points Which of these correctly describes osmosis? Question 32 0 out of 1 points Which of these events does not promote skeletal muscle relaxation? Question 33 1 out of 1 points At rest, its function is to block the myosin-binding sites on actin. Which skeletal muscle protein does this describe? Question 34 1 out of 1 points The concentration of osmotically active particles in a solution expressed as milliosmoles per liter is called; Question 35 1 out of 1 points Which of these neurotransmitters is majorly inhibitory in its effect on neurotransmission? Question 36 1 out of 1 points At rest, the membrane conductance of which of these ions is the highest in human cells? Question 37 0 out of 1 points How does hyperkalemia alter resting membrane potential? Question 38 1 out of 1 points Which of these may serve as a sensor for the gates of physiological ion channels? Question 39 1 out of 1 points Which of these describes the physiologic significance the Na+/K+ ATPase? Question 40 1 out of 1 points Which of these statements about simple and facilitated diffusion is inaccurate? Question 41 0 out of 1 points Which of these parameters reduces the diffusion coefficient most significantly? Question 42 1 out of 1 points Attaches the troponin complex to tropomyosin.Which skeletal muscle protein does this describe? Question 43 1 out of 1 points Which of these statements about refractory period is not true? Question 44 0 out of 1 points A man is poisoned with curare. Which of the following agents would worsen his condition: Question 45 1 out of 1 points This term describes two solutions with an equal amount of osmotically active particles is; Question 46 0 out of 1 points Which of these statements about the ionic basis of action potentials is accurate? Question 47 0 out of 1 points The following classes of drugs are contraindicated in a patient with myasthenia gravis except: Question 48 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 49 1 out of 1 points The active tension developed in a muscle is proportional to the number of cross-bridges that cycle. Question 50 1 out of 1 points At high solute concentrations, the available binding sites become scarce and the rate of transport levels off. When all of the binding sites are occupied, saturation is achieved at a point called the transport maximum, or T m. What feature of carrier-mediated transport does this describe? [Show More]

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