What is the name of the high-pressure capillary bed of the nephron that resides between the afferent and efferent arterioles?
Glomerulus
Bowman's capsule
Vasa recta
Macula densa
The Correct Answer is A
A. Glomerulus: The glomerulus is a high-pressure capillary bed in the nephron where filtration of blood occurs.
B. Bowman's capsule: This is the cup-shaped structure surrounding the glomerulus, not a capillary bed.
C. Vasa recta: These are capillaries surrounding the loop of Henle, involved in the reabsorption process, not filtration.
D. Macula densa: This is a group of specialized cells in the distal convoluted tubule that sense sodium concentration and affect glomerular filtration rate, but it is not a capillary bed.
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Related Questions
Correct Answer is D
Explanation
A. Bacteria: Interferons are not primarily effective against bacteria; they are specific to viral infections.
B. Parasites: While some immune responses can involve interferons, they are not specifically targeted against parasites.
C. Fungi: Interferons have limited activity against fungal infections, making them less effective compared to their antiviral properties.
D. Viruses: Interferons are proteins produced by virus-infected cells that help to protect neighboring cells from viral infection by enhancing the immune response and inhibiting viral replication.
Correct Answer is A
Explanation
A. Epiglottis: The epiglottis is a leaf-shaped flap of cartilage located at the root of the tongue. It covers the opening of the trachea during swallowing to prevent food and liquids from entering the airway. This function is crucial for protecting the respiratory tract from aspiration.
B. Arytenoids: The arytenoid cartilages are small, paired cartilages that are involved in the movement and tension of the vocal cords but do not cover the opening of the trachea.
C. Thyroid: The thyroid cartilage is the largest cartilage of the larynx and forms the Adam's apple but does not cover the trachea.
D. Cricoid: The cricoid cartilage is located below the thyroid cartilage and is the only complete ring of cartilage around the trachea. While it provides support, it does not cover the opening of the trachea.
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