Chapter 1 Flashcards
Nervous tissue
Specialized elongated extremely irritable. Muscle contracts in response to the electrochemical stimuli provided by the nervous system.
Motor unit
Produces muscle action.
Consist of a nerve cell and all the muscle Iberia served by the nerve cell
Nerve cell
Axon - nerve cell process divides into
Axon fibrils then terminate in the form of
Muscle ends plates which are in direct contact with the muscle fibers
Muscle contraction
Latent period - interval between the onset of stimulus and onset of contraction
Contraction period - returns to previous relaxed state
Refractory period - chemical phase that restores the muscle to its normal resting state.
Innervation ratio
High innervation ratio = many muscle fibers to few nerve cells. Execute crude movements with large muscle contractions
Low innervation ratio - few muscle fibers to many nerve cells - smaller contractions with finer control
Vascular tissue
Fluid tissues. 10% of the body. Transport food and oxygen to the living cells of the body and take wast materials generated by cellular activity. They distribute heat and defend the body against disease. Fluids remain consistent due to the circulatory system which is the lungs thorax and the left and right ventricles.
Blood
Lymph
Vascular tissue - blood
Contains corpuscles (cells) and platelets which are separated by a fluid intercellular substance called blood plasma
Vascular tissue - lymph
Immediate nutrient of the tissue, colorless, watery looking liquid , contains cells called lymphocytes.
Organ
Two or more tissues combined and show unity. Somewhat independent part of the body that performs a special function
Parenchyma
Cells that compose the essential structures of an organ
Systems - 11 of them
Skeletal Articular Muscular Digestive Vascular Nervous Respiratory Urinary Generative and reproduction Endocrine Integumentary
Myofibrils
Delicate filaments muscle fibers are composed of that contain long protein molecules called myosin and actin
Anatomy
The study of the structure of organisms and the relations of their parts
Different parts of anatomy
Descriptive Regional Applied Microscopic Developmental Geriatric
Speech pathologists are interested in what type of anatomy
Regional of the head and neck
Physiology
The science that deals with the function of living organisms or their parts
Different types of physiology
Animal Applied Cellular Experimental Pathological General Special Vegetable
-arthrodial
Joint
Bi
Two or double
Cellular
Related to the cell
Chondrium
Related to cartilage
Cyto-
Pertaining to a cell
Endo-
Toward the interior
Epi-
Upon or above
Extra-
Outside of
Inter-
Between