PRIN. OF LIFE (LOOSELEAF) W/LAUNCHPAD
3rd Edition
ISBN: 9781319465377
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 32.3, Problem 1FQ
Summary Introduction
To determine: The importance of the negative-feedback loops for the stability of blood hormone concentrations.
Introduction: In positive feedback, the overall effect of the change is reinforced, and negative feedback helps in stabilizing a particular system by the activation of the response of the body. Both types of feedback mechanisms are important for living organisms for the regulation of various types of processes in the body.
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A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
With reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobin
Chapter 32 Solutions
PRIN. OF LIFE (LOOSELEAF) W/LAUNCHPAD
Ch. 32.1 - Prob. 1LOCh. 32.1 - Prob. 2LOCh. 32.1 - Prob. 3LOCh. 32.1 - Prob. 1RACh. 32.1 - Prob. 2RACh. 32.1 - Prob. 3RACh. 32.2 - Prob. 1LOCh. 32.2 - Prob. 2LOCh. 32.2 - Prob. 3LOCh. 32.2 - Prob. 1RA
Ch. 32.2 - Prob. 2RACh. 32.2 - Prob. 3RACh. 32.3 - Prob. 1LOCh. 32.3 - Prob. 2LOCh. 32.3 - Prob. 3LOCh. 32.3 - Prob. 1FQCh. 32.3 - Prob. 1ICh. 32.3 - Prob. 2ICh. 32.3 - Prob. 3ICh. 32.3 - Prob. 4ICh. 32.3 - Prob. 5ICh. 32.3 - Prob. 1RACh. 32.3 - Prob. 2RACh. 32.3 - Prob. 3RACh. 32.4 - Prob. 1LOCh. 32.4 - Prob. 2LOCh. 32.4 - Prob. 3LOCh. 32.4 - Prob. 1TKCh. 32.4 - Prob. 2TKCh. 32.4 - Prob. 1RACh. 32.4 - Prob. 2RACh. 32.4 - Prob. 3RACh. 32.5 - Prob. 1LOCh. 32.5 - Prob. 2LOCh. 32.5 - Prob. 1FQCh. 32.5 - Prob. 1RACh. 32.5 - Prob. 2RACh. 32.5 - Prob. 3RACh. 32 - Prob. 1.1QCh. 32 - Prob. 1.2QCh. 32 - Prob. 1.3QCh. 32 - Prob. 2.1QCh. 32 - Prob. 2.2QCh. 32 - Prob. 2.3QCh. 32 - Prob. 3.1QCh. 32 - Prob. 3.2QCh. 32 - Prob. 3.3QCh. 32 - Prob. 4.1QCh. 32 - Prob. 4.2QCh. 32 - Prob. 4.3QCh. 32 - Prob. 5.1QCh. 32 - Prob. 5.2Q
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