Muscular

Muscular System http://www.medicalook.com/systems_images/Muscular_System.jpg

(1) What are the three types of muscles in the human body? (Describe and include pictures) __Smooth muscles, Skelital and cardiac muscles__

(2) List and discuss the functions of muscles. __Smooth muscles- control involitary actions ,caridac muscles- the heart is made of cardiac muscles, skelital muslces- control voluntary actions__

(3) Give an example that illustrates how muscles work in antagonistic pairs. (pictures good) __biceps and triceps__

(4) Describe the microscopic anatomy of muscle fiber and explain the sliding filament model of muscle contraction. (long answer) __Muscles fibers are comprised of several parts, the endoplasmic reticulum, sarcolema and cytoplasm. these are the main components involved in the muscles sliding movement.__ __The slideing filimimints are stimulated by impulses traveling down the t tub__

(5) Describe the structure and function of the neuromuscular junction. __Neuron impulses stimulate the fibers in the neuromuscular junction__

(6) Describe the events as myosin pulls actin toward the center of the sarcomere. __The myosin and sacromere work together to make the actin work__

(7) Contrast a muscle twitch with summation and tetanus. __Muscle twiches occur one at a time and happen very very quikly__

(8) What is muscle tone, and how is it maintained? __Muslce tone is achieved and maintained by contiuous contraction__