Chapter 5: The nervous, muscular and skeletal system Flashcards
Human movement system (HMS)
Collective components and structures that work together to move the body: muscular, skeletal and nervous systm
Kinetic chain
Concept that describes the human body as a cain of interdependent links that work together to perform movement
Nervous system
Network of specialized cells called neurons that transmit and coordinate signals, providing a communication network within the human body
Neuron
Specialized cell that is the functional unit of the nervous system
Nucleus
Cellular structure or organelle that contains the majority of the cell’s genetic material in the from of chromosoms
Organelles
Cellular structures that perform specific functions within the cell. Eg. nuclei, mitochondria, lysosomes, ribosomes, ER
Mitochondria
Powerhouse of the cell
Effector sites
A part of the body, such as a muscle or organ, that receives a signal from a neuron to produce a physiological response
Electrolytes
Minerals that have an electrical charge to help transmit nerve impulses through the body such as sodium, potassium and magnesium
Central nervous system (CNS)
Brain and spinal cord
Peripheral nervous system (PNS)
Nerves that connect the rest of the body to the CNS
Afferent pathway
Sensory pathway that relays information to the CNS
Efferent pathway
Motor pathway that relays information from the CNS to the rest of the body
Interneurons
Neurons located in the spinal cord and brain that transmit impulses between afferent and efferent neurons
Mechanoreceptors
Specialized structures that respond to mechanical force within tissues and then transmit signals through sensory nerves
Somatic nervous system
Nerves that serve the outer areas of the body and skeletal muscle and are largely responsible fir the voluntary control of movement
Autonomic nervous system
Division of the peripheral nervous system that supplies neural input to organs that run the involuntary processes of the body eg blood circulation, digestion
Sympathetic nervous system
Subdivision of the autonomic nervous system that works to increase neural activity and put the body in a heightened state (fight or flight)
Parasympathetic nervous system
Subdivision of the autonomic nervous system that works to decrease neural activity and put the body in a more relaxed state (rest and digest)
Sensory function
Ability of the nervous system to sense changes in either the internal or external environment
Proprioception
The body’s ability to naturally sense its general orientation and relative position of its parts
Integrative function
The ability of the NS to analyze and interpret the sensory information to allow for proper decision-making, which produces an appropriate response
Motor function
The neuromuscular response to the integrated sensory information
Golgi tendon organ (GTO)
Specialized sensory receptor located at the point where skeletal muscle fibers insert into the tendons of skeletal muscle; sensitive to changes in muscular tension and rate of tension change