Question 49 Which of the following is not consistent with spinal muscular atrophy? O A. proximal muscle weakness and atrophy B. can be diagnosed on genetic testing O C. destruction of alpha motor neurons in anterior horns of the SC O D. carrdiomyopathy is the most common cause of death O E. generally normal creatine kinase in blood in SMA type 1
Question 53 Blood acidosis caused by respiratory failure would be compensated by O A. increased elimination of CO₂ through breathing O B. eliminating metabolic acids in urine O C. renal retention of hydrocardbonate ions O D. increasing haemoglobin saturation with oxygen O E. increasing partial pressure of oxygen in blood
Question 55 In demyelination electrical impulse conduction block occurs because A. ATP energy becomes unavailable B. voltage gated sodium channels at nodes of Ranvier are destroyed O C. of leakage of electrical current from axon segments not covered by myelin O D. sodium-potassium pumps stop working O E. there are too many voltage gated sodium channels under the myelin
Question 56 Which of the following would not be expected in Guillain-Barré syndrome? O A. PNS demyelinating process B. motor weakness is greater and earliest in the legs O C. autonomic dysfunction O D. weakness/loss of deep tendon reflexes O E. sensory loss greater in the arms than the legs
Question 57 All fo the following statements about primary bone cancers are true except O A. Osteosarcomas commonly develop near the metaphysis of long bones in young patients O B. Ewing sarcoma is an aggressive bone tumor of childhood and adolescence O C. Chondrosarcoma is most prevalent primary bone cancer in adults O D. Chondrosarcomas are generally slowly-growing cancers that rarely metastasise O E. Unlike bone metasases primary bone cancers generally do not cause bone pain
Question 49 Which of the following is not consistent with spinal muscular atrophy? O A. proximal muscle weakness and atr
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