Suppose We Make a Scale Model of Our Solar System

question 63

Multiple Choice

Suppose we make a scale model of our solar system, with the Sun the size of a grapefruit. Which of the following best describes what the planets would look like?

• A)The planets are all much smaller than the Sun. Four planets are within about 20 meters of the Sun, while the rest planets are spread much farther apart.
• B)The planets range in size from about the size of a marble to the size of a baseball. They are spread out over a region about the size of a football field.
• C)The planets are all much smaller than the Sun and are spread out evenly over a distance about the length of a large classroom.
• D)The planets are all much smaller than the Sun. Four planets are located within a few centimeters of the Sun, and four planets are located at distances ranging up to about a meter.

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Definitions:

Cyclic AMP

Cyclic AMP (cAMP) is a second messenger important in many biological processes, serving as a signaling molecule that transduces extracellular signals into cellular responses.

Signal Transduction

Signal Transduction is the process by which a cell converts one kind of signal or stimulus into another, involving a sequence of biochemical reactions inside the cell, which are carried out by enzymes and linked through second messengers.

Reception

In biological terms, it relates to the process by which cells detect and respond to signals from their environment, often involving molecules binding to receptors on the cell surface.

Signal Transmission

The process by which information is conveyed from one part of a cell, organism, or device to another through various means like electrical or chemical signals.