Final answer:
The definition of pressure/resistance in Manual Muscle Testing (MMT) is the force applied by a physical therapist during the test to assess the muscle's strength by its ability to resist the applied force. Option b.
Step-by-step explanation:
In the context of Manual Muscle Testing (MMT), the definition of pressure/resistance refers to the force that a physical therapist applies during the test. MMT is a procedure used to assess the strength of individual muscles or muscle groups based on their ability to resist externally applied forces. During MMT, a physical therapist will apply a specific amount of pressure against the muscle being tested while the patient resists the force, allowing the therapist to grade the muscle strength.
Therefore, the correct answer is: b) The force applied by a physical therapist during MMT.
Pressure in a general physical context has a clear definition as well, where it is described as the force per unit area, applied in a direction perpendicular to the surface of an object. However, for MMT, we focus on the specific application and resistance of this force in a clinical setting to measure muscle strength.