Metabolic Muscular and Nervous Systems
The immediate source of energy for muscular contraction is the high-energy phosphate compound called adenosine triphosphate (ATP). Although ATP is not the only energy-carrying molecule in the cell, it is the most important one, and without sufficient amounts of ATP most cells die quickly. The three main parts of an ATP molecule are: an adenine portion, a ribose portion, and three phosphates linked together. The formation of ATP occurs by combining adenosine diphosphate (ADP) and inorganic phosphate (Pi). This formation requires a large amount of energy to and it is called a high-energy bond. In order for a muscle to contract, the enzyme ATPase breaks the ATP bond and releases energy which is used to do work. ATP is the energy produced from the breakdown of food into a useable form of energy required by cells. Muscle cells store limited amounts of ATP. Therefore, because muscular exercise requires a constant supply of ATP to provide the energy needed for contraction, metabolic pathways must exist in the cell to be able to produce ATP rapidly. Muscle cells can produce ATP by three metabolic pathways: creatine phosphate (CP), formation of ATP, formation of ATP through the degragation of glucose or glycogen (glyc
- circumduction - complete circular movement 2) Saddle - thumb joints, the articular surfaces fit together concave cavity, movement is allowed in any direction. They are the The nervous system is the body's means of perceiving and responding to events in the internal and external environments. Receptors capable of sensing touch, pain, temperature, and chemical stimuli send information to the central nervous system (CNS) concerning changes in our environment. The CNS responds by either voluntary movement or a change in the rate of release of some hormone from the endocrine system, depending on which response is appropriate. The nervous system is divided into two major divisions, the central nervous system and the peripheral nervous system. The central nervous system includes the brain and the spinal cord, and the peripheral nervous system includes the nerves outside the central nervous system.
Some common words found in the essay are:
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Approximate Word count = 3597
Approximate Pages = 14 (250 words per page double spaced)
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