Listeria, like all bacteria, emit small molecules as waste products or for signaling. Here we will consider a "race" between a Listeria bacterium (about 1 um across) and a chemical signal it emits while inside a much larger (~ 15 µm) mammalian cell. Suppose the Listeria bacterium, when at one end of the mammalian cell, emits a pulse of signaling molecules which begin diffusing through the mammalian cell. The Listeria then moves along a straight line from one end of the mammalian cell to the other. a. Write down the equation for the rms distance, assuming the diffusion is three-dimensional. Explain in words what the rms distance means (that is, what it tells us about a diffusion process).
Listeria, like all bacteria, emit small molecules as waste products or for signaling. Here we will consider a "race" between a Listeria bacterium (about 1 um across) and a chemical signal it emits while inside a much larger (~ 15 µm) mammalian cell. Suppose the Listeria bacterium, when at one end of the mammalian cell, emits a pulse of signaling molecules which begin diffusing through the mammalian cell. The Listeria then moves along a straight line from one end of the mammalian cell to the other. a. Write down the equation for the rms distance, assuming the diffusion is three-dimensional. Explain in words what the rms distance means (that is, what it tells us about a diffusion process).
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,...
Related questions
Concept explainers
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
Question
Transcribed Image Text:Listeria, like all bacteria, emit small molecules as waste products or for
signaling. Here we will consider a "race" between a Listeria bacterium
Mammalian cell
(about 1 um across) and a chemical signal it emits while inside a much larger
(~ 15 um) mammalian cell. Suppose the Listeria bacterium, when at one
end of the mammalian cell, emits a pulse of signaling molecules which begin
diffusing through the mammalian cell. The Listeria then moves along a
straight line from one end of the mammalian cell to the other.
a. Write down the equation for the rms distance, assuming the
Listeria
diffusion is three-dimensional. Explain in words what the rms
distance means (that is, what it tells us about a diffusion process).
b. Using a diffusion constant of 200 um? /s, about how long does it take the signaling molecules to reach
the other side of the mammalian cell?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education