Importance of channel proteins for water transport

Since aquaporins are essential
for water transport across cells, they are widely distributed throughout the
body in tissues where water movement is critical. Different types of aquaporin
proteins, such as Aquaporin 1 (AQP1), Aquaporin 6 (AQP6), and Aquaporin 10
(AQP10), each serve distinct functions.

In the kidneys, the hormone
antidiuretic hormone (ADH) regulates water reabsorption by controlling the
expression and activity of aquaporins, particularly in the collecting ducts.

Based on the information
provided in the images, which of the following statements accurately describe
the role of aquaporins in physiological processes and their involvement in
water balance regulation?

Question

Importance of channel proteins for water transport

Since aquaporins are essential
for water transport across cells, they are widely distributed throughout the
body in tissues where water movement is critical. Different types of aquaporin
proteins, such as Aquaporin 1 (AQP1), Aquaporin 6 (AQP6), and Aquaporin 10
(AQP10), each serve distinct functions.

In the kidneys, the hormone
antidiuretic hormone (ADH) regulates water reabsorption by controlling the
expression and activity of aquaporins, particularly in the collecting ducts.

Based on the information
provided in the images, which of the following statements accurately describe
the role of aquaporins in physiological processes and their involvement in
water balance regulation?

Answer

In
conditions of excessive dehydration, ADH levels increase, leading to an
upregulation (i.e., increase) of aquaporin in the kidney’s collecting duct.
This enhances water reabsorption into the bloodstream, reducing urine output
and promoting water retention.

Answer

AQP5 plays a crucial role in saliva production,
and pulmonary secretions, highlighting its involvement in hydration and surface
lubrication.

Answer

In conditions of excessive hydration, ADH levels
increase, leading to an upregulation (i.e. increase) of aquaporins in the
kidney. This helps reabsorb water from the kidney’s collecting duct and helps promote
further water retention.

Answer

AQP4
plays a significant role in lens transparency and tear secretion.

Answer

Aquaporins are found only in the kidneys and
play no role in other physiological functions such as vision, brain fluid
secretion, or lung secretions.

Answer

When blood water content is low, ADH secretion
is increased, thereby reducing urine output. AQP in kidneys is likely to play a
role here by releasing more water in the urinary bladder.

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Importance of channel proteins for water transport Since aquaporins are es...

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