Section 17.3- The muscular system makes movement possible Vocabulary 1. Muscular system- The muscles of the body that together with the skeletal system, function to produce movement 2. Skeletal muscle – A muscle that attaches to the skeleton 3. Voluntary muscle- A muscle that can be moved at will 4. Smooth muscle- Muscle that performs involuntary movement and is found inside certain organs such as the stomach 5.
What is a tendon made of? Tendons are made of dense, regular connective tissue. This form of connective tissue consists of densely packed bundles of collagen fibres. These fibres all run parallel to each other in the direction of the pull that is generated on the tendon What are agonistic muscles? Agonistic muscles are a classification used to describe a muscle that causes specific movement or possibly several movements to occur through the process of its own contraction.
In describing the cellular components of skeletal muscle, several specialized terms are used such as the plasma membrane of skeletal muscle is called the sarcolemma; its cytoplasm is known as sarcoplasm; the endoplasmic reticulum is called the sarcoplasmic reticulum. The term motor unit is used to describe a group of muscle fibers innervated by a single motor nerve, the fibers within a single motor unit contract simultaneously (Van and Marleen,2000). Each muscle cell is surrounded by a sarcolemma and has many nuclei occurring at intervals along its length. The nuclei are displaced peripherally within a cross section of the sarcoplasm while a large number of longitudinal myofibrils, groups of arranged contractile proteins, occupy most of the center space(Tortora and Derrickson,2011). Based on nerve stimulation studies, skeletal muscles are divided into two muscle fiber types, the first type is called Slow-twitch muscle fibers which mainly rely on aerobic metabolism.
However, with motion you must know about levers. The framework of the body is covered in muscle which permits movement. When moving or lifting a heavy load, it’s easier to use levers, and in the body it’s the exact same. All levers use 5 different parts; Lever, Fulcrum, Muscle force, Resistive force and Torque. Lever; almost always the bone Fulcrum; the pivot point of the lever in which is usually the joint.
Deep Fascia connective tissue with dense irregular tissue that lines the body wall and limbs. Muscle Cell muscle fibers that are elongated and striated and multinucleated. A skeletal muscle fiber is actually embryonic cells that have fused together to form one large cell with multiple nuclei. Perimysium dense
Whenever a mineral is needed hormone signals are sent to the bones and the mineral that is needed is released into the blood stream. Vitamin D is needed for bones to properly absorb and store these minerals. 2) Flat bones provide extensive surfaces for muscles to attach. Muscles attach to flat bones to help provide movement of the arms and legs. Flat bones provide protection for the internal organs including the brain, heart, lungs, liver and kidneys.
Brock Perry HPE295 Grier Gatlin Muscle Fibers Our body is composed of many different groups of muscles and each person has a unique composition of muscle tissue in their body. Different types of athletes usually have one predominant type of muscle fiber, that being the kind that suits their sport the best. Each one has it's own characteristics and is suited to a particular type of movement. Another way to classify these fiber types is by their contractile and metabolic properties, thereby dividing them into slow and fast twitch fibers. The first type of fiber we will look at is the type I, or slow twitch fibers.
When the muscles contract the bones move 5. Blood production - red blood cells (to carry oxygen) and white blood cells (to protect against infection) are produced in the bone marrow of some bones. The Structure and Physiology of Bone Bone is
Describe the structure and development of bone and the factors that influence it. Bone is living tissue that makes up the body's skeleton. The bone consists of blood vessels, nerve cells and living bone cells. Bones are made up of calcium, phosphorus, sodium, and other minerals, as well as the protein collagen. Calcium is needed to make bones hard, which allows them to support your weight.
Controlled Variables: frequency of stimulation; stimulation voltage; temperature Effect of Stimulation Frequency on Contraction 1. Dependent Variable: contraction force 2. Independent Variable: frequency of stimulation 3. Controlled Variables: stimulation voltage; temperature 4. What structure was stimulated to cause a muscle contraction?