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Questions and Answers
What is the primary purpose of changes in the rate of respiration?
What is the primary purpose of changes in the rate of respiration?
- To maintain a constant pH level
- To meet metabolic demand (correct)
- To control heart rate
- To regulate body temperature
Which part of the nervous system plays a crucial role in regulating bronchiole diameter?
Which part of the nervous system plays a crucial role in regulating bronchiole diameter?
- Peripheral Nervous System (PNS)
- Central Nervous System (CNS)
- Somatic Nervous System (SNS)
- Autonomic Nervous System (ANS) (correct)
What is the consequence of disorders that affect the regulation of bronchiole diameter?
What is the consequence of disorders that affect the regulation of bronchiole diameter?
- Increased oxygen levels in the blood
- Difficulty breathing and asthma-like symptoms (correct)
- Decreased heart rate
- Increased lung capacity
What stimulates changes in the rate of respiration to meet metabolic demand?
What stimulates changes in the rate of respiration to meet metabolic demand?
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What is the effect of increased bronchiole diameter?
What is the effect of increased bronchiole diameter?
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Study Notes
Control of Respiration
- The rate of respiration is regulated to meet metabolic demands through the autonomic nervous system (ANS)
- The ANS receives input from chemoreceptors that monitor CO2, O2, and pH levels in the blood
- The ANS responds to changes in these levels by adjusting breathing rate to maintain homeostasis
Regulation of Bronchiole Diameter
- The ANS regulates bronchiole diameter through the sympathetic and parasympathetic nervous systems
- Sympathetic stimulation causes bronchodilation, increasing bronchiole diameter
- Parasympathetic stimulation causes bronchoconstriction, decreasing bronchiole diameter
Consequences of Disorders: Asthma
- Asthma is a chronic disorder characterized by recurring episodes of bronchospasm, wheezing, and shortness of breath
- In asthma, the airways become inflamed and susceptible to allergens, irritants, or respiratory infections
- During an asthma attack, the bronchioles constrict, reducing airflow and leading to respiratory distress
- Treatment for asthma involves medication to relax bronchial smooth muscle, reducing bronchoconstriction and improving airflow
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