Muscular System

Some muscles in your leg are hamstrings, quads, and gastrocnemius*.

*The largest muscle in your calf muscle. It helps you extend you foot, raise your heel, and assists you in bending your knee.

A muscle that, from origin to insertion, crosses two joints, and thus can produce an action at both joints. Example: the "hamstrings" (semimembranosis and semintendinosis) cross the hip joint and the knee joint and act on both joints (extend at hip, flex at knee).

Yes they do. once an impulse of great enough it opens these little reticulums which contain calcium. the calcium floods out causing a reaction that makes the muscle contract. All to do with ATP and so on and so forth . when the nerve stops this impulse the reticulums draw the calcium back in and the muscle relaxes.

muscular endurance
muscular endurance

The gracilis muscle lies on the inner thigh, connecting from the lower portion of your pubic bone to the upper inner surface of your knee bone. The Sartorius muscle connects from the upper portion of your pubic bone and wraps around the thigh and connecting to the inner portion of the knee.

ofcourse not; slow twitch muscle fibers are: * smaller in diameter * red in color * depend on oxidative phosphorylation for their ATP supply * are highly vascularized (better blood supply) * have more mitochondria * more myoglobin fast twitch muscle fibers * larger * white * glycolysis is the source of ATP * less vascularized * less mitochondria * less myoglobin

Calcium is actually the main cation (positively charged ion) responsible for muscle contraction. Most people think it is Sodium or Potassium. Sodium is an anion (negatively charged ion) which controls your body's saturation (all the way down to the cellular level) and also aids in transporting minerals. What happens when you are dehydrated? Your muscles cramp up. Potassium is a cation which creates electricity. In muscle movement, sodium and potassium create a channel in which sodium rushes in and potassium rushes out causing the muscle fiber membrane to become more positively charged, triggering an action. This ultimately would not be possible without calcium, which starts the whole process. For more information check out the following link.

References: http://en.wikipedia.org/wiki/Muscle_contraction

AAOS Emergency Medical Technician Book

There are many different types of movements of the shoulder joint and each movement requires the cooperation of muscles that attach to the scapula. The muscles involved are: Levator scapulae, Rhomboid Major, Rhomboid Minor, Latissimus dorsi, Trapezius, Deltoid, Supraspinatus, Infraspinatus, Teres Minor, Teres Major, and Subscapularis.

Gastrocnemius

The stomach has muscles that squeeze and mix food as well as acids that break it down. The stomach, then, performs both mechanical and chemical digestion.

At the ankle joint: calf - platarflexion.

Anterior tibialis is inovolved in countermovement dorsiflexion.

At the knee joint: quadriceps - knee extension

Hamstrings are involved in the knee flextion counter movement.

At the hip: hamstrings, glutes, spinal errectors - hip flexion.

Hip flexors, and abdominals are involved in the initial countrer movement and the "breaking" of the hip flexion.

Additional upward thrust is also provided by the shoulders during arm thrust.

Hip flexors, and abdominals are involved in the initial countrer movement and the "breaking" of the hip flexion.

Big toe is mostly involved in the "toe off" movement.

These are the main muscles involved in movement and coutnermovements.

Heartbeats are the repeated contraction of cardiac muscles.

Slow Twitch (:

latissimus dorsi, supra spinatus , infra spinatus , teres minor , pectoralis major, teres major, brachialis , coracobrachialis, brachioradialis, pronator teres, common origin of flexors, extensor carpi radialis longus, common origin of extensors,

The main factor that determines the power of the muscle is the total number of muscle cells available for contraction.

if you want girls all around you and you want to be small there is 37 chest excercises from incline bench press with dumbells bench with dumbells dumbell flys around the worlds and alot more and you have to run.

if you want to get big for a powerlifting meet to bench alot then don't do much cardio do lots of protein like protein powders creatine and if you post a q about creatine i will answer it for you do lots of working out but don't over work or you might lose mucle but work as hard as possible work about a hour each mucle don't just work your chest

so strong means not much cardio but fast ripped means cardio go to bodybuilding.com if you want to find out more that is one of the 2 or 3 websites i study off of any more q i will get to u eventually

The only thing your muscle tissue can do is contract and uncontract which is how you lift up your are so if you read this you will see when you do a curl with your arm it will get tighter because your muscles are contracting. and then when you let it down that are uncontracting. Uncontracting is not a word but is use that for the lack of a better one and most people understand uncontracting better than others.

Skeletal muscle cells

thats life

shoulder flexion

shoulder adduction

shoulder horizontal extension