Questions and Answers
What is the primary mechanism by which the carotid body detects changes in arterial oxygen levels?
Direct detection of oxygen levels by glomus cells
Which of the following is a characteristic of a type I alveolar cell?
Flat, squamous shape with a large surface area
What is the primary function of the Ito cells in the liver?
Storing vitamin A and regulating sinusoidal blood flow
Which of the following is a characteristic of a slow-twitch (type I) muscle fiber?
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What is the primary mechanism by which atrial natriuretic peptide (ANP) lowers blood pressure?
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Study Notes
Respiratory System
- The primary mechanism by which the carotid body detects changes in arterial oxygen levels is through the release of excitatory neurotransmitters from glomus cells.
Pulmonary Anatomy
- A characteristic of a type I alveolar cell is that it is a thin, flat cell that forms the majority of the alveolar surface area, facilitating gas exchange.
Hepatic System
- The primary function of the Ito cells in the liver is to store vitamin A and regulate the formation of extracellular matrix.
Muscular System
- A characteristic of a slow-twitch (type I) muscle fiber is that it is highly resistant to fatigue, has a high capacity for oxidative phosphorylation, and is specialized for low-intensity, long-duration activities.
Cardiovascular System
- The primary mechanism by which atrial natriuretic peptide (ANP) lowers blood pressure is by promoting sodium excretion and vasodilation, resulting in decreased blood volume and peripheral resistance.
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Description
This quiz covers various aspects of medical physiology, including oxygen detection, alveolar cells, liver cells, muscle fibers, and blood pressure regulation.
