28. Anna is training to be a cell culture technician. She uses some sterile dis- tilled water to wash a batch of cell culture plates. When she looks at the cell culture plates under the microscope to check the cells after this, she notices the cells have burst. She realizes she should have used 0.9% saline instead. Explain what has happened, and why she should have used the saline.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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30. Bill is a famous football player. He broke his right leg during a rough
encounter in the field. The fracture is healing well but Bill is not happy about
the fact that his well-developed muscles are clearly decreasing in size in the
injured leg. What is happening to Bill's muscles and why?
20. Anna is training to be a cell culture technician, She uses some sterile dis-
tilled water to wash a batch of cell culture plates. When she looks at the cell
culture plates under the microscope to check the cells after this, she notices
the cells have burst. She realizes she should have used 0.9% saline instead.
Explain what has happened, and why she should have used the saline.
29. The 'respiratory mucosa' consists of columnar and ciliated epithelial cells
and covers the larger part of the nasal cavity. It is rather vulnerable when
compared to the mucosa of the oropharynx which is a more robust non-
keratinized squamous stratified epithelium. Why does this difference in
mucosal strength exist?
Won
a
Transcribed Image Text:30. Bill is a famous football player. He broke his right leg during a rough encounter in the field. The fracture is healing well but Bill is not happy about the fact that his well-developed muscles are clearly decreasing in size in the injured leg. What is happening to Bill's muscles and why? 20. Anna is training to be a cell culture technician, She uses some sterile dis- tilled water to wash a batch of cell culture plates. When she looks at the cell culture plates under the microscope to check the cells after this, she notices the cells have burst. She realizes she should have used 0.9% saline instead. Explain what has happened, and why she should have used the saline. 29. The 'respiratory mucosa' consists of columnar and ciliated epithelial cells and covers the larger part of the nasal cavity. It is rather vulnerable when compared to the mucosa of the oropharynx which is a more robust non- keratinized squamous stratified epithelium. Why does this difference in mucosal strength exist? Won a
Chapter 3 Cells and Tissues
65
31. Twenty-five year old Mary is in the third trimester of her pregnancy. She is
worried because her legs and ankles got quite puffy recently. Her doctor
explains that it is normal to experience a certain amount of swelling during
pregnancy because more water is retained in body tissues. What is Mary's
condition called and how do you think it has developed?
LHE EIVE AIbrE CHOICE
32. Graeme has been diagnosed with sickle cell anemia. This is caused by a
DNA mutation that results in the production of abnormal red blood cells.
Which two processes will be affected?
33. Sarah, a trainee of the electron microscopist at the local hospital, is reviewing t as) A
some micrographs of muscle cells and macrophages (phagocytic cells). She
notices that the muscle cells are loaded with mitochondria while the
macrophages have abundant lysosomes. Why is this so?
Sallo o
aino M 6
34. Sylvine has had her ear pierced through her elastic cartilages. Her aftercare
leaflet tells her that the tissues will take up to 12 months to heal. Why is this
the case?
35. In normally circulating blood, the plasma proteins cannot leave the
bloodstream easily and thus tend to remain in the blood. But if stasis (blood
flow stoppage) occurs, the proteins will begin to leak out into the interstitial
fluid. Explain why this leads to edema (water buildup in the tissues).
Transcribed Image Text:Chapter 3 Cells and Tissues 65 31. Twenty-five year old Mary is in the third trimester of her pregnancy. She is worried because her legs and ankles got quite puffy recently. Her doctor explains that it is normal to experience a certain amount of swelling during pregnancy because more water is retained in body tissues. What is Mary's condition called and how do you think it has developed? LHE EIVE AIbrE CHOICE 32. Graeme has been diagnosed with sickle cell anemia. This is caused by a DNA mutation that results in the production of abnormal red blood cells. Which two processes will be affected? 33. Sarah, a trainee of the electron microscopist at the local hospital, is reviewing t as) A some micrographs of muscle cells and macrophages (phagocytic cells). She notices that the muscle cells are loaded with mitochondria while the macrophages have abundant lysosomes. Why is this so? Sallo o aino M 6 34. Sylvine has had her ear pierced through her elastic cartilages. Her aftercare leaflet tells her that the tissues will take up to 12 months to heal. Why is this the case? 35. In normally circulating blood, the plasma proteins cannot leave the bloodstream easily and thus tend to remain in the blood. But if stasis (blood flow stoppage) occurs, the proteins will begin to leak out into the interstitial fluid. Explain why this leads to edema (water buildup in the tissues).
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