MICROANATOMY

Detailed explanation-1: -The lengths and velocities of muscle fibers have a dramatic effect on muscle force generation. It is unknown, however, whether the lengths and velocities of lower limb muscle fibers substantially affect the ability of muscles to generate force during walking and running.

Detailed explanation-2: -Expert Answer. The correct answer is “ amount of stored ATP in the muscle cells”. Actin-myosin cross-bridges are formed as a result of action potentials from efferent neurons, which cause muscle contraction.

Detailed explanation-3: -Answer and Explanation: The statement that is false is d. sarcomeres increase in length during contraction. Sarcomeres are the smallest contractile units of muscles and they actually shorten, which causes muscle contraction.

Detailed explanation-4: -Muscular forces is an example of contact force. It comes into effect only when a physical contact is established.