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Gennadij [26K]
3 years ago
12

A new type of communication system has been discovered that consists of thin, highly elongated tubules capable of conducting cel

l-surface proteins, cytoplasmic vesicles and calcium signals from one cell to another. This system is referred to as:
A. tunneling nanotubes
B. tunneling nanotypes
C. scanning tunneling EMs
D. sarcoplasmic tubules
E. T tubules
Biology
1 answer:
ella [17]3 years ago
4 0

Answer: A. tunneling nanotubes

Explanation:

A tunnelling nanotube (TNT) also called membrane nanotube is a concept that has been applied to protrusions extending from the plasma membrane that enables different animal cells to interact over long distances, often over 100 μm between T cells.

There are two types of tunneling nanotube including one type of smaller than 0.7 micrometres in diameter which contains actin, and carries parts of plasma membrane in both directions between cells. The second type is larger than 0.7 μm that contains both microtubules and actin, and may carry cytoplasm components such as vesicles and organelles, including whole mitochondria, between cells.

TNT functions in the development of various diseases by allowing the movement of protein, pathogens aggregates and mitochondria.

Hence, the correct option is A. tunneling nanotubes.

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Answer:

The color would be Pink

Explanation:

According to the question, the bacteria is positive for the enzyme urease and it's inoculated for 24 hours.

Urease broth is a differential medium that tests the ability of an organism to produce urease, that hydrolyzes urea to ammonia and carbon dioxide. The broth contains two pH buffers, urea, a very small amount of nutrients for the bacteria, and the pH indicator phenol red. Phenol red turns yellow in an acidic environment and fuchsia in an alkaline environment.

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Urea broth is formulated to test for rapid urease-positive organisms. The restrictive amount of nutrients coupled with the use of pH buffers prevent all but rapid urease-positive organisms from producing enough ammonia to turn the phenol red pink.

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Mariana [72]

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