A Space Probe Leaves the Solar System to Explore Interstellar

question 59

Multiple Choice

A space probe leaves the solar system to explore interstellar space. Once it is far from any stars, when must it fire its rocket engines?

• A) all the time, in order to keep moving
• B) only when it wants to speed up
• C) only when it wants to slow down
• D) only when it wants to turn
• E) when it wants to speed up, slow down, or turn

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Definitions:

Exocytosis

A process by which a cell transports secretory products through the cytoplasm to the plasma membrane and then releases them into the extracellular environment.

Lysis

The process of disintegration of a cell or some other structure.

Tight Junctions

Specialized structures that form between some animal cells, producing a tight seal that prevents materials from passing through the spaces between the cells.

Desmosomes

Cell structures specialized for cell-to-cell adhesion, acting as anchors to bind cells together in tissues.