A couple is told by their doctor that the reason why they cannot have children is that the sperm of the male lack motility because it does not have the structures responsible for propulsion. Which cellular structures are likely to be the underlying cause of this lack of motility? Microtubules Golgi apparatus Endoplasmic Reticulum Vacuoles
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The question states that a couple cannot have children because the male's sperm lack motility due to the absence of structures responsible for propulsion. We need to identify which cellular structures are responsible for sperm motility (propulsion). Show more…
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What structure appears to be underdeveloped or missing in the microtubules of the sperm flagellum affected by Kartagener syndrome? The plasma membrane The dynein "arms" Pairs of microtubules What is the normal function of this missing structure? A motor protein that crawls along microtubules to contract and release them, which provides movement A cytoskeleton element composed of tubulin subunits to provide structure for movement of the cell A lipid bilayer controlling the movement of substances into and out of the cell Based on the information discussed here, how do you expect Kartagener syndrome leads to infertility? The lack of dynein means that the sperm cannot bend their tails to swim and fertilize the egg The lack of microtubules means the sperm do not have tails and cannot swim to fertilize the egg The lack of a plasma membrane means that pathogens and foreign substances can permeate the sperm and damage the DNA
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Two brothers were under medical treatment for infertility. Microscopic examination of their semen shows that although the sperm looked normal, they did not move properly. The brothers also suffered with chronic bronchitis. The doctors studying the cases decided that both men had a problem with one particular cell organelle. Which one? (A) Endoplasmic reticulum (B) Golgi body (C) Ribosomes (D) Microtubules (E) Mitochondria
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