Pathophysiology > EXAM > Exam 1 Pathophysiology. Question and answers. 2021. (All)

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Exam 1 Pathophysiology. Question and answers. 2021.

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 Question 1 1.334 out of 1.334 points A child is diagnosed with cystic fibrosis. History reveals that the child’s parents are siblings. Cystic fibrosis was most likely the result of: Selected... Answer: consanguinity. Answers: X-inactivation. genomic imprinting. consanguinity. obligate carriers. Response Feedback : Consanguinity refers to the mating of two related individuals, and the offspring of such matings are said to be inbred. Consanguineous matings produce a significant increase in recessive disorders and are seen most often in pedigrees for rare recessive disorders. X-inactivation occurs when one X chromosome in the somatic cells of females is permanently inactivated. Genomic imprinting is related to methylation and other changes. Obligate carriers are those who have an affected parent and affected children and, therefore, must themselves carry the mutation.  Question 2 1.334 out of 1.334 points A biopsy of the lung bronchi revealed ciliated epithelial cells that are capable of secretion and absorption. These cells are called _____ columnar epithelium. Selected Answer: ciliated simple Answers: simple ciliated simple stratified pseudostratified ciliated Response Feedback : Ciliated simple columnar epithelium is found in the lungs. Simple columnar epithelium is found from the stomach to the anus. Stratified columnar epithelium is found in the lining of the epiglottis, part of the pharynx, the anus, and the male urethra. Pseudostratified ciliate columnar epithelium is found in the lining of the large ducts of some glands (parotid, salivary), male urethra, respiratory passages, and Eustachian tubes of the ears.  Question 3 1.334 out of 1.334 points A biologist is explaining how RNA directs the synthesis of protein. Which process is the biologist describing? Selected Answer: Translation Answers: Terminatio n Transcripti on Translocati on Translation Response Feedback : In translation, RNA directs the synthesis of a polypeptide, interacting with transfer RNA (tRNA), a cloverleaf-shaped strand of about 80 nucleotides. Termination does not involve synthesis of protein. Transcription is the process by which DNA specifies a sequence of messenger RNA (mRNA). Translocation is the interchange of genetic material between nonhomologous chromosomes. [Show More]

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