Human Anatomy and Physiology Practice Test 5Pankaj SahaNovember 26, 2022 0% 0 Human Anatomy and Physiology Practice Test 5 This Human Anatomy and Physiology Practice Test Contains 250 Questions but every time you will get 20 different Questions to answer 1 / 20 A biotechnology company is working to design a new therapeutic strategy for cancer that involves triggering an enhanced immune response to cellular proteins that are mutated in the disease. Which of the following immune cells or processes will most likely not be required for a successful therapy? Gene rearrangements producing T cell receptors Antigen presentation in the context of MHC-II Cytotoxic T cells Proteosomal degradation 2 / 20 A 38-year-old woman with a metastatic brain tumor was brought to the emergency department of her local hospital because of irregular breathing and progressive loss of consciousness. She also showed signs of decerebrate posturing. Which of the following is not TRUEabout decerebrate rigidity? It is actually a type of spasticity due to inhibition of the stretch reflex It involves hyperactivity in extensor muscles of all four limbs The excitatory input from the reticulospinal pathway activates ?-motor neurons, which indirectly activate ?-motor neurons It resembles what ensues after uncal herniation 3 / 20 A patient with parathyroid deficiency 10 days after inadvertent damage to the parathyroid glands during thyroid surgery would probably have high plasma phosphate and Ca2+ levels and bone demineralization low plasma phosphate and Ca2+ levels and tetany a low plasma Ca2+ level, increased muscular excitability, and spasm of the muscles of the upper extremity (Trousseau sign). low plasma phosphate and Ca2+ levels and tetanus 4 / 20 Testosterone is produced as a precursor for several membrane lipids in the testes after reduction of dihydrotestosterone by LH in Leydig cells. in Leydig cells from cholesterol and pregnenolone precursors 5 / 20 A patient suffering from an acute flare in his rheumatoid arthritis undergoes a procedure where fluid is removed from his swollen and inflamed knee joint. Biochemical analysis of the inflammatory cells recovered from the removed fluid would most likely reveal a decrease in which of the following proteins? Tumor necrosis factor-? I?B? Interleukin-1 Nuclear factor-?B 6 / 20 In the utricle, tip links in hair cells are involved in regulation of distortion-activated ion channels. perception of sound movements of the basement membrane formation of perilymph. 7 / 20 The membrane potential of a particular cell is at the K+ equilibrium. The intracellular concentration for K+ is at 150 mmol/L and the extracellular concentration for K+ is at 5.5 mmol/L. What is the resting potential? +90 mV -90 mV -70 mV +70 mV 8 / 20 The correct sequence of events involved in phototransduction in rods and cones in response to light is: structural changes in rhodopsin, decrease in intracellular cGMP, decreased release of glutamate, closure of Na+ channels, and activation of transducin. structural changes in rhodopsin, activation of transducin, decrease in intracellular cGMP, closure of Na+ channels, and decreased release of glutamate decreased release of glutamate, activation of transducin, closure of Na+ channels, decrease in intracellular cGMP, and structural changes in rhodopsin activation of transducin, decreased release of glutamate, structural changes in rhodopsin, closure of Na+ channels, and decrease in intracellular cGMP 9 / 20 A 50-year-old woman undergoes a neurologic exam that indicates loss of pain and temperature sensitivity, vibratory sense, and proprioception in the left leg. These symptoms could be explained by a metabolically inactive spot where his hand area in his left primary somatosensory cortex would normally be. expansion of the right hand area in his left primary somatosensory cortex projection of fibers from neighboring sensory areas into the right hand area of his left primary somatosensory cortex. projection of fibers from neighboring sensory areas into the right hand area of his right primary somatosensory cortex 10 / 20 A 32-year-old man had medial temporal lobe epilepsy for over 10 years. This caused bilateral loss of hippocampal function. As a result, this individual might be expected to experience a loss of working memory. loss of the ability to encode events of the recent past into long-term memory loss of the ability to recall faces and forms but not the ability to recall printed or spoken words. disappearance of remote memories. 11 / 20 If a nasal biopsy were performed on the patient described in Question 2 while symptomatic, histologic examination of the tissue would most likely reveal degranulation of which of the following cell types? Mast cells Monocytes Dendritic cells Neutrophils 12 / 20 When dynamic ?-motor neurons are activated at the same time as ?-motor neurons to muscle, the number of impulses in spindle Ia afferents is greater than when ? discharge alone is increased. the number of impulses in spindle Ia afferents is smaller than when ? discharge alone is increased. the muscle will not contract. prompt inhibition of discharge in spindle Ia afferents takes place. 13 / 20 A 45-year-old woman who had never needed to wear glasses experienced difficulty reading a menu in a dimly-lit restaurant. She then recalled that as of late she needed to have the newspaper closer to her eyes in order to read it. A friend recommended she purchase reading glasses. Visual accommodation involves is epithelial tissue that contains photoreceptors has an inner nuclear layer that contains bipolar cells, horizontal cells, and amacrine cells contains ganglion cells whose axons form the oculomotor nerve. lines the anterior one-third of the choroid. 14 / 20 A 60-year-old man with Parkinson disease, which was diagnosed 15 years ago, has been taking carbidopa and levodopa (Sinemet); until recently, he has been able to continue to work and help with routine jobs around the house. Now his tremor and rigidity interfere with these activities. His clinician has suggested that he undergo deep brain stimulation therapy. The therapeutic effect of L-dopa in patients with Parkinson disease eventually wears off because there is an increase in circulating ?-synuclein the normal action of nerve growth factor (NGF) is disrupted. antibodies to dopamine receptors develop. the dopaminergic neurons in the substantia nigra continue to degenerate 15 / 20 A 47-year-old woman experienced migraine headaches that were not relieved by her current pain medications. Her doctor prescribed one of the newer analgesic agents that exert their effects by targeting synaptic transmission in nociception and peripheral sensory transduction. Which of the following drugs is correctly paired with the type of receptor it acts on to exert its antinociceptive effects? Topiramate and Na+ channel Gabapentin and Nav1.8 Ziconotide and NMDA receptors Naloxone and opioid receptors 16 / 20 A 55-year-old woman had an autonomic neuropathy that disrupted the sympathetic nerve supply to the pupillary dilator muscle of her right eye. While having her eyes examined, the ophthalmologist placed phenylephrine in her eyes. The right eye became much more dilated than the left eye. This suggests that the parasympathetic nerve supply to the right eye remained intact and compensated for the loss of the sympathetic nerve denervation supersensitivity had developed. the left eye also had nerve damage and so was not responding as expected. phenylephrine blocked the pupillary constrictor muscle of the right eye. 17 / 20 The electrogenic Na, K ATPase plays a critical role in cellular physiology by using the energy in moving Na+ outside of the cell or K+ inside the cell to make ATP using the energy in moving Na+ into the cell or K+ outside the cell to make ATP using the energy in ATP to extrude 3 Na+ out of the cell in exchange for taking two K+ into the cell using the energy in ATP to extrude 3 K+ out of the cell in exchange for taking two Na+ into the cell 18 / 20 A 20-year-old woman was diagnosed with Bell palsy (damage to facial nerve). Which of the following symptoms is she likely to exhibit? Loss of sense of taste All of the above Facial twitching and Ipsilateral facial paralysis Droopy eyelid 19 / 20 Gap junctions are intercellular connections that primarily serve to keep cells separated and allow for transport across a tissue barrier are cellular components for constitutive exocytosis that occurs between adjacent cells. serve as a barrier to prevent protein movement within the cellular membrane serve as a regulated cytoplasmic bridge for sharing of small molecules between cells 20 / 20 While exercising, a 42-year-old woman developed sudden onset of tingling in her right leg and an inability to control movement in that limb. A neurologic exam showed a hyperactive knee jerk reflex and a positive Babinski sign. Which of the following is not characteristic of a reflex? Reflexes involve transmission across at least one synapse Reflexes are chronically suppressed after spinal cord transection Reflexes may involve simultaneous contraction of some muscles and relaxation of others Reflexes can be modified by impulses from various parts of the CNS Your score is The average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart Quiz Send feedback Pos.NameScoreDurationThere is no data yet
