Answer to Question 1
ANS: A
This movement causes eccentric tension and isotonic contraction. Eccentric tension helps control the speed and direction of movement. For example, when using an overhead trapeze, the patient slowly lowers himself to the bed. The lowering is controlled when the antagonistic muscles lengthen. By pushing on the chair arms and rising eccentric tension and isotonic contraction occurred. In concentric tension, increased muscle contraction causes muscle shortening, resulting in movement such as when a patient uses an overhead trapeze to pull up in bed. Concentric and eccentric muscle actions are necessary for active movement and therefore are referred to as dynamic or isotonic contraction. Isometric contraction (static contraction) causes an increase in muscle tension or muscle work but no shortening or active movement of the muscle (e.g., instructing the patient to tighten and relax a muscle group, as in quadriceps set exercises or pelvic floor exercises).
Answer to Question 2
ANS: A, B, C
Stress causes prolonged changes in the immune system, which can result in impaired immune function, and this increases the person's susceptibility to changes in health, such as increased risk for infection, high blood pressure, diabetes, and cancers. Allostasis is a return to a state of balance; allostatic load occurs with prolonged stress.
The nurse needs to inform the patient with impaired vision when a touch is to occur and ask permissi
Patient Teaching
A physician uses a portable electronic tablet to enter patient data while in the examination room.
Role-Playing a Situation in Which a Patient Is from Another Culture
Patient with osteoarthritis.
Bar-eye phenotypes in contrast to the wild-type eye in Drosophila