Chapter 5 Flashcards
Human movement system (HMS)
System = collective components, work together
Movement = muscle, skeleyal, nervous
The collective components and structures that work together to move the body: muscular, skeletal, and nervous systems.
Kinetic chain
A concept that describes the human body as a chain of interdependent links that work together to perform movement.
Nervous system
Neurons communicating
A network of specialized cells called neurons that transmit and coordinate signals, providing a communication network within the human body.
Neuron
-A cell-
A functional unit of the nervous system
Nucleus
Who: Cellular structure or organelle
what: that contains the majority of the cell’s genetic material
How: in the form of chromosomes.
Organelles
Tiny cellular structures that perform specific functions within a cell.
Examples include nuclei, mitochondria, lysosomes, ribosomes, and the endoplasmic reticulum.
Effector sites
Nerve fiber Causes glands to secrete
An effector is a nerve fiber that ends at a gland or muscle, causing it to contract or secrete.
such as a muscle or organ,
Electrolytes
Electrical Minerals
Minerals that have an electrical charge to help transmit nerve impulses throughout the body, such as sodium, potassium, and magnesium.
Central nervous system (CNS)
A division of the nervous system that includes the brain and spinal cord.
Peripheral nervous system (PNS)
Nerves that connect the rest of the body to the central nervous system.
Afferent pathway
senses to CNS
Sensory pathway that relays information to the central nervous system.
Afferent arrives, efferent exits
Efferent pathway
CNS to Body
A motor pathway that relays information from the central nervous system to the rest of the body.
Interneurons
Brain, spinal neurons
Neurons located within the spinal cord and brain that transmit impulses between afferent and efferent neurons.
Connects afferent and efferent neurons
Mechanoreceptors
Responds to touch
Specialized structures that respond to mechanical forces (touch and pressure) within tissues and then transmit signals through sensory nerves
Somatic nervous system
voluntary movement
Nerves that serve the outer areas of the body and skeletal muscle and are largely responsible for the voluntary control of movement.
Autonomic nervous system
Automatic Bodily Functions
A division of the peripheral nervous system that supplies neural input to organs that run the involuntary processes of the body (e.g., circulating blood, digesting food, producing hormones).
Sympathetic nervous system
Heightened Neural States
Subdivision of the autonomic nervous system that works to increase neural activity and put the body in a heightened state.
think of adrenaline
Parasympathetic nervous system
Decreased Neural Activity
Subdivision of the autonomic nervous system that works to decrease neural activity and put the body in a more relaxed state.
Think deep breathing, meditation, prayer
Sensory function
Body Awarness
Ability of the nervous system to sense changes in either the internal or external environment.
Feeling, Knowing your body
Proprioception
Relative Position, Orientation
The body’s ability to naturally sense its general orientation and relative position of its parts.
Autonomic nervous system
Involuntary Processes
A division of the peripheral nervous system that supplies neural input to organs that run the involuntary processes of the body
(e.g., circulating blood, digesting food, producing hormones).
Sympathetic nervous system
Heightened Nerves
Subdivision of the autonomic nervous system that works to increase neural activity and put the body in a heightened state.
(think of adrenaline)
Parasympathetic nervous system
Decreased nerves
Subdivision of the autonomic nervous system that works to decrease neural activity and put the body in a more relaxed state.
(meditation, prayer, deep breathing)
Sensory function
Feeling your Body
Ability of the nervous system to sense changes in either the internal or external environment.
knowing your body
Integrative function
Nervous System Learning
The ability of the nervous system to analyze and interpret the sensory information to allow for proper decision-making, which produces an appropriate response.
Putting it all together.
Motor function
Neural Response
The neuromuscular response to the integrated sensory information.
Movement, action
Muscle spindles
Sensory Organs
detect muscle length and stretch, and help the central nervous system (CNS) determine body position and movement.
They are found in almost all muscles of the body
Stretch reflex
Self-Protection
Neurological signal from the muscle spindle that causes a muscle to contract to prevent excessive lengthening.
Golgi tendon organ (GTO)
Sensory Receptors
A 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.
pays attention to tension in your muscle
Joint receptors
Joint Receptors
Receptors located in and around the joint capsule that respond to pressure, acceleration, and deceleration of the joint.
pays attention to tension changes in your joints
Neuroplasticity
Brain Growth
The concept that the brain will continually change or grow, reforming neural pathways throughout an individual’s entire life span.
New pathways change the brain
Neurocircuitry
Connections
The interconnection of neurons in the brain and spinal cord.
circuits are connected loops
Motor skills
Specific Movements
Specific movements through the coordinated effort of the sensory and motor subsystems.
mind, body
Axial skeleton
Skull, RibCage, Spine
A division of the skeletal system consisting of the skull, the rib cage, and the vertebral column.
Appendicular skeleton
Arms, Legs, Pelvis
A division of the skeletal system consisting of the arms, legs, and pelvic girdle.
Levers
Rigid rods where muscles attach.
Remodeling
Throughout life, bone is constantly renewed through a process called remodeling, which is a process that consists of resorption and formation of the bone structure by special cells
Osteoclasts vs Osteoblasts
Build vs Collapse
Osteoclasts are special cells that break down and remove old bone tissue. Osteoblasts are special cells that form and lay down new bone tissue
osteo-B-lasts B-uild bone, while osteo-C-lasts C-ollapse bone”.
Wolff’s law
New Bone Growth
Scientific explanation of how remodeling occurs along the lines of stress placed on the bone.
Use is or lose it
Depressions
Indented Bone
Flattened or indented portions of bone.
Processes
Processes Protrude
Projections protruding from the bone where tendons and ligaments can attach.
Vertebral column
Bones that house the spinal cord; consists of the cervical, thoracic, and lumbosacral regions.
Spinal cord
Bundle of nerves housed within the vertebrae.
Intervertebral discs
Fibrous cartilage structures between vertebrae that act as shock absorbers and assist with movement.
Neutral Spine
Represents a position in which the vertebrae and associated structures are under the least amount of load and can most optimally support functional movement.
Osteokinematics
Movement of a limb that is visible.
Osteo Cinematics
Arthrokinematics
Joint Surfaces
Arthrokinematics refers to the movement of joint surfaces
three major types: roll, slide, and spin.
Synovial joints
A joint with a fluid-filled joint capsule.
Nonaxial
A gliding joint that moves in only one plane, either back and forth or side to side.
Nonsynovial joints
Joints that have no joint capsule, fibrous connective tissue, or cartilage in the uniting structure.
Ligament
Bone to bone: A fibrous connective tissue linking bones
Collagen
A protein found in connective tissue, muscles, and skin that provides strength and structure. It is the most abundant protein in the human body.
Elastin
A protein that provides elasticity to skin, tendons, ligaments, and other structures.
Growth plate
A specialized cartilage disc located in the epiphysis that is responsible for longitudinal bone growth.
Fascia
Connective tissue that surrounds muscles and bones.
Skeletal muscle
The type of muscle tissue that connects to bones and generates the forces that create movement.
Epimysium
Inner layer of fascia that directly surrounds an entire muscle, commonly referred to as the “deep fascia.”
Fascicles
Largest bundles of fibers within a muscle. Fascicles are surrounded by perimysium.
Perimysium
Connective tissue surrounding a muscle fascicle.
Endomysium
Connective tissue that wraps around individual muscle fibers within a fascicle.
Glycogen
Glucose that is deposited and stored in bodily tissues, such as the liver and muscle cells; the storage form of carbohydrate.
Myoglobin
Protein-based molecule that carries oxygen molecules into the muscles.
Myofibrils
The contractile components of a muscle cell; the myofilaments (actin and myosin) are contained within a myofibril.
Myofilaments
The filaments of a myofibril; include actin and myosin.
Actin
The thin, stringlike, myofilament that acts along with myosin to produce muscular contraction.
Myosin
The thick myofilament that acts along with actin to produce muscular contraction.
Sarcomere
The structural unit of a myofibril composed of actin and myosin filaments between two Z-lines.
Z-line
The meeting point of each sarcomere.
Neural activation
The nervous system’s signal that tells a muscle to contract.
Neuromuscular junction
The specialized site where the nervous system communicates directly with muscle fibers.
Synapse
A junction or small gap between the motor neuron and muscle cells.
Motor unit
A motor neuron and all of the muscle fibers that it innervates
Action potential
Nerve impulse that is relayed from the central nervous system, through the peripheral nervous system, and into the muscle across the neuromuscular junction.
Neurotransmitters
Chemical messengers that cross the synapse between neuron and muscle and assist with nerve transmission.
Acetylcholine (ACh)
A neurotransmitter that helps the action potential cross the synapse into the muscle, which initiates the steps in a muscle contraction.
Sliding filament theory
The series of steps in muscle contraction involving how myosin (thick) and actin (thin) filaments slide past one another to produce a muscle contraction, shortening the entire length of the sarcomere.
Excitation-contraction coupling
The physiological process of converting an electrical stimulus to a muscle contraction.
Power stroke
The myosin heads bind to actin and pull them toward the sarcomere center, which slides the filaments past each other, shortening the muscle.
Adenosine triphosphate (ATP)
A high-energy molecule that serves as the main form of energy in the human body; known as the energy currency of the body.
Resting length
The length of a muscle when it is not actively contracting or being stretched.
Type I muscle fibers
Muscle fibers that are small in size, generate lower amounts of force, and are more resistant to fatigue.
Type II muscle fibers
Muscle fibers that are larger in size, generate higher amounts of force, and are faster to fatigue.
All-or-nothing principle
Motor units cannot vary the amount of force they generate; they either contract maximally or not at all.
Capillaries
The smallest blood vessels and the site of exchange of elements between the blood and the tissues.
