Which Two Genera Have Members That Can Evade the Human

question 52

Multiple Choice

Which two genera have members that can evade the human immune system by frequently changing their surface proteins?
1) Plasmodium
2) Trichomonas
3) Paramecium
4) Trypanosoma
5) Entamoeba

• A) 1 and 2
• B) 1 and 4
• C) 2 and 3
• D) 2 and 4
• E) 4 and 5

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Definitions:

Relief Valve

A safety valve designed to automatically release pressure from a vessel or system when the pressure exceeds safe levels, preventing potential damage or explosion.

Flow Control Valve

Used in hydraulic circuits to regulate the speed of actuators. Functions by defining a flow area and is rated by operating pressure and capacity. It can be used in meter-in or meter-out applications. Two general types are used: bleed-off and fixed orifice.

Pitman Shaft

Part of the steering mechanism in vehicles, connecting the steering box to the steering linkage, enabling the transfer of motion to steer the wheels.

Splines

Radial lands that either protrude from or are milled into a shaft to permit it to engage with female splines for the purpose of transmitting torque.