Microbiology: A Systems Approach
Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
bartleby

Videos

Question
Book Icon
Chapter 7, Problem 3CTQ

a.

Summary Introduction

To describe:

The reason why red blood cells were not seen in the sample where they were suspended in sterile water.

Concept introduction:

Osmosis occurs when water is transported by fluids across a semi-permeable membrane down the concentration gradient. This process takes place in accordance with temperature, and pressure. If the concentration of solute and free water molecules is same, the solution is isotonic and doesn’t involve any movement of water across the semi-permeable membrane. When a solution with varying concentrations is divided by a semi-permeable membrane, a solution that contains higher concentration is calledit as a hypertonic solution and that is more diluted is called isotonic solution.

b.

Summary Introduction

To describe:

The consequence of suspending bacterial cells in sterile water.

Concept introduction:

If the concentration of solute and free water molecules is same, the solution is isotonic, and it does not involve any movement of water across the cell membrane by osmosis. When a solution with varying concentrations is divided by a membrane, the area with higher concentration is the hypertonic solution and the area which is more diluted is called as the isotonic solution. Osmosis always occurs down the concentration gradient (from low concentration to high concentration).

Blurred answer
Students have asked these similar questions
a. What can you observe in viewing your stained bacterial slide under the microscope if you fixed a lot of bacterial colonies in your slide during smear preparation?   b. What can you observe in viewing your stained bacterial slide under the microscope if you heat fixed your slide in a much longer exposure to heat?
You have a culture of cells at a density of 2.7 x 109 cells/mL and you want to plate out 100 cells in a volume of 200 μL. Explain how you would do this.
You have been asked to do a strucutural study to understand how increasing cell surface area affects cell size, cell shape and functions. What cell type would help you most efficiently observe the effects of increasing surface area?  Choices:  A. Monocytes from the blood serum. Monocytes are largely roughly spherical cells.  B. Red Blood cells from the bone marrow. The shape of Red blood cells is a biconcave disk and looks like a donut. C. Stem cells from skin. In this case assume a skin stem cell is flat and plate like.  D. Microvilli covered cells from the intestines. Microvilli are tiny hair like protrusions in the plasma membrane of intestinal cells that increase the absorption of nutrients in the intestines.

Chapter 7 Solutions

Microbiology: A Systems Approach

Knowledge Booster
Background pattern image
Biology
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.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Complete Textbook Of Phlebotomy
Biology
ISBN:9781337464314
Author:Hoeltke
Publisher:Cengage
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Text book image
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Introduction to the NIOSH Manual of Analytical Methods Fifth edition; Author: Centers for Disease Control and Prevention (CDC);https://www.youtube.com/watch?v=B5rUrKLMoas;License: Standard Youtube License