LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 48.5, Problem 3R
Summary Introduction
To review:
The relation between the sensitivity of cells of carotid and aortic bodies to decrease blood flow and a decrease in the partial pressure of oxygen (PO2) of the blood.
Introduction:
Aortic arteries are present in left ventricle of the human heart and are responsible for the distribution of oxygenated blood in the tissues of the body. It is able to sense the lack of oxygen and stimulate the breathing control center in the brain which elevates the breathing rate and maintains the oxygen level.
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*Example 2: Tracing the path of an autosomal dominant trait
Trait: Neurofibromatosis
Forms of the trait:
The dominant form is neurofibromatosis, caused by the production of an abnormal form of the protein
neurofibromin. Affected individuals show spots of abnormal skin pigmentation and non-cancerous
tumors that can interfere with the nervous system and cause blindness. Some tumors can convert to a
cancerous form. i
The recessive form is a normal protein - in other words, no neurofibromatosis.moovi
A typical pedigree for a family that carries neurofibromatosis is shown below. Note that carriers are not
indicated with half-colored shapes in this chart. Use the letter "N" to indicate the dominant neurofibromatosis
allele, and the letter "n" for the normal allele.
Nn
nn
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2
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Nn
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3
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Chapter 48 Solutions
LIFE: THE SCIENCE OF BIOLOGY
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