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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Transcribed Image Text:Question 4
My Response
Pneumonia is a lung infection that can be
caused by a species of bacteria,
Streptococcus aureus. The antibiotic penicillin
has been used historically to treat bacterial
pneumonia. In recent years, doctors have
observed that penicillin is less effective as
treatment for pneumonia.
Doctors collected data about the percent of S.
aureus bacteria that were resistant to
penicillin. The graph shows the percent of
penicillin-resistant S. aureus from 1940 to
2010 in one hospital.
Penicillin-Resistant S. aureus, 1940 to 2010
100
80
20
1940 1950 1960 1970 1980 1990 2000 2010
Year
Percent of S. aureus that
are Resistant to Penicillin

Transcribed Image Text:Which of the following best describes the
change in the percent of penicillin-resistant S.
aureus bacteria since 1940 ?
The percent of resistant S.
aureus grew exponentially
from 1980 to 2010.
The percent of resistant S.
aureus doubled from 1950 to
1960.
The percent of resistant S.
aureus reached its peak in
1960.
The S. aureus population
reached its carrying capacity
by 1990.
Expert Solution

Step 1
Staphylococcus aureus is a Gram-positive, round-shaped bacterium that belongs to the Bacillota family. It is a common member of the body's microbiota, particularly abundant in the respiratory tract and on the skin. It is a facultative anaerobe that can grow without oxygen which is often positive for catalase and nitrate reduction.
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