Answer:
Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as by holding a heavy book or a dumbbell at the same position. The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state.
Explanation:
B. Testicle, because it secretes hormones
Oranges are healthy because they have vitamin C in them which is good for your immune system.
Milk is healthy because it has calcium which is good for your bones.
Fish is healthy because is has vitamin B which promotes cell health.
Answer:
Explanation:
At the point when you're focused on, your breathing examples change and cause strain and pressure in the mid-back. Your shoulders hunch up and cause torment all through the upper and center back. Low-back torment incorporates the tailbone and lower half of the back muscles. These muscles influence adaptability and posture.
