Chp 10-Muscle Tension, Isotonic & Isometric contractions

Question 1

Muscle Tension

Answer 1

muscle force exerted on object, e.g., muscle of hand holding a 30 lb ball above the head

Question 2

Isotonic contraction

Answer 2

tension develops & the object or load is moved - E.g., adult successfully lifted the ball over their head; weightlifting (when can’t move anymore weights=isometric)

Question 3

Isometric contraction

Answer 3

tension develops but the object doesn’t move - E.g., a 3 year old tries to lift the ball but can’t; like holding a yoga post
Note: myofilaments try to slide but can’t

Question 4

Muscle Tone

Answer 4

continuous partial contractions
note: body is in constant readiness for movement