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<span>RATIONALE: </span>
<span>The patient with chronic obstructive pulmonary disease (COPD) develops a barrel chest over time because trapped air enlarges the lungs and thoracic cavity, thereby reducing chest flexibility. Sunken chest, also known as funnel chest or pectus excavatum, is not related to COPD. Hyperventilation is not characteristically seen with COPD. Instead, the patient usually displays persistent dyspnea on exertion, with or without a chronic cough. Circumoral cyanosis is a bluish discoloration of the skin surrounding the mouth. It is usually an indication of a severely diminished level of oxygen and respiratory distress. Circumoral cyanosis can result from a variety of respiratory diseases and may be a late sign of the COPD disease process.
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The first one: A mutation may cause a change that codes for the same amino acid. It is not possible (or likely) that the transcription will skip over the mutation. Mutations, especially large frameshifts, are important. It does not matter how much proteins are replicated. A mutation in the DNA sequence will affect the mRNA.
Explanation:
What is the greatest danger to a patient who has had damage to the skin? excessive muscle contractions in the damaged area loss of oils produced by the skin infections in uncovered tissues damaged tissues entering the blood stream?
Costs of fossil fuels:
-nonrenewable resource
-pollution
Benefits of fossil fuels:
-easy to use
-cheap
Costs of windpower:
-harder to get
-expensive
Benefits of windpower:
-no pollution
-inexhaustible
Answer:
they developed some structures or parts to survive
the terrestrial environment
