David Has Just Been Told by His Doctor That He

question 18

Multiple Choice

David has just been told by his doctor that he has a malignant growth. Which of the following is true?

• A) He has a noncancerous tumor.
• B) The tumor cells are spreading through his body.
• C) He has a single mutation in one of his oncogenes.
• D) both (b) and (c)

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Definitions:

Rack And Pinion

A type of linear actuator that involves a circular gear (the pinion) engaging a linear gear (the rack) to create linear motion from rotational motion.

Fifth Wheel

A pivoting platform attached to a tractor or truck chassis that provides a coupling point for a semi-trailer.

Axle

A rod or bar on which wheels turn or the housing that supports wheel assemblies. Also used to describe the shaft that transmits drive torque to the drive wheels.

Drivelines

Components, including the driveshaft, axles, CV joints, and differential, that transmit power from the engine to the wheels of a vehicle.