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NASM Certification > Chapter 5 - Nervous, Skeletal, And Muscular Systens > Flashcards

Chapter 5 - Nervous, Skeletal, And Muscular Systens Flashcards

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1
Q

Human movement system (HMS)

A

Collective components and structures that work together to move the body: nervous, skeletal and muscular systems

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2
Q

Kinetic chain

A

Concept that describes the human body as a chain of interdependent links that work together to perform movement

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3
Q

Nervous system

A

A network of specialized cells called neurons that transmit and coordinate signals, providing communication network within the human body

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4
Q

Neuron

A

Specialized cell, functional unit of nervous system

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5
Q

Nucleus

A

Cellular structure or organelles that contains the majority of the cells genetic material in form of chromosomes

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6
Q

Organelles

A

Tiny cellular structures that perform specific functions within a cell. Examples include nuclei, mitochondria, lysosomes, ribosomes, and the endoplasmic reticulum.

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7
Q

Mitochondria

A

The parts of the cell that use nutrients to create energy for the cell; commonly known as the powerhouses of the cell.

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8
Q

Effector sites

A

A part of the body, such as a muscle or organ, that receives a signal from a neuron to produce a physiological response.

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9
Q

Electrolytes

A

Minerals that have an electrical charge to help transmit nerve impulses throughout the body, such as sodium, potassium, and magnesium.

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10
Q

Central nervous system (CNS)

A

A division of the nervous system that includes the brain and spinal cord.

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11
Q

Peripheral nervous system (PNS)

A

Nerves that connect the rest of the body to the central nervous system.

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12
Q

Afferent pathway

A

Sensory pathway that relays information to the central nervous system.

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13
Q

Efferent pathway

A

A motor pathway that relays information from the central nervous system to the rest of the body.

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14
Q

Interneurons

A

Neurons located within the spinal cord and brain that transmit impulses between afferent and efferent neurons.

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15
Q

Mechanoreceptors

A

Specialized structures that respond to mechanical forces (touch and pressure) within tissues and then transmit signals through sensory nerves.

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16
Q

Somatic nervous system

A

Nerves that serve the outer areas of the body and skeletal muscle and are largely responsible for the voluntary control of movement.

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17
Q

Automatic nervous system

A

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).

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18
Q

Sympathetic nervous system

A

Subdivision of the autonomic nervous system that works to increase neural activity and put the body in a heightened state.

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19
Q

Parasympathetic nervous system

A

Subdivision of the autonomic nervous system that works to decrease neural activity and put the body in a more relaxed state.

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20
Q

Sensory function

A

Ability of the nervous system to sense changes in either the internal or external environment.

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21
Q

Proprioception

A

The body’s ability to naturally sense its general orientation and relative position of its parts.

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22
Q

Integrative function

A

The ability of the nervous system to analyze and interpret the sensory information to allow for proper decision-making, which produces an appropriate response.

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23
Q

Motor function

A

The neuromuscular (or nervous and muscular systems) response to the integrated sensory information.

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24
Q

Muscle spindles

A

Sensory receptors sensitive to change in length of the muscle and the rate of that change.

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25
Q

Stretch reflex

A

Neurological signal from the muscle spindle that causes a muscle to contract to prevent excessive lengthening.

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26
Q

Golgi tendon organ

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.

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27
Q

Joint receptors

A

Receptors located in and around the joint capsule that respond to pressure, acceleration, and deceleration of the joint.

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28
Q

Neuroplasticity

A

The concept that the brain will continually change or grow, reforming neural pathways throughout an individual’s entire life span.

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29
Q

Neurocircuity

A

The interconnection of neurons in the brain and spinal cord.

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30
Q

Skeletal system

A

A description of the bones of the body

31
Q

Osteoporosis

A

A condition of reduced bone material density, which increases risk of bone fracture

32
Q

Joints

A

The sites where two bones meet and movement occurs as a result of muscle contraction

33
Q

Axial skeleton

A

A division of the skeletal system consisting of the skull, the rib cage, and the vertebral column.

34
Q

Appendicular skeleton

A

A division of the skeletal system consisting of the arms, legs, and pelvic girdle.

35
Q

Levers

A

Rigid rods where muscles attach.

36
Q

Remodeling

A

The process by which bone is constantly renewed by the resorption and formation of the bone structure.

37
Q

Osteoclasts

A

Special cells that break down and remove old bone tissue.

38
Q

Osteoblasts

A

Special cells that form and lay down new bone tissue.

39
Q

Wolff’s law

A

Scientific explanation of how remodeling (new bone growth) occurs along the lines of stress placed on the bone.

40
Q

Depressions

A

Flattened or intended portions of bone

41
Q

Vertebral column

A

Bones that house the spinal cord; consists of the cervical, thoracic and lumbosacrao regions

42
Q

Spinal cord

A

Bundle of nerves housed within vertebrae

43
Q

Osteokinematics

A

Movement of a limb that is visible

44
Q

Arthrokinematics

A

Description of joint surface movement; consists of 3 major types: roll slide, and spin

45
Q

Synovial joints

A

Joint with fluid-filled joint capsule

46
Q

Nonaxial

A

Gliding joint that moves in only one plane, either back and forth or side to side.

47
Q

Nonsynovial joints

A

Joints that have no joint capsule, fibrous connective tissue, or cartilage in uniting structure

48
Q

Ligament

A

Fibrous connective tissue that connects bone to bone

49
Q

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.

50
Q

Elastin

A

Protein that provides elasticity to skin, tendons, ligaments, and other structures

51
Q

Skeletal muscle

A

The type of muscle tissue that connects to bones and generates the forces that create movement

52
Q

Fascia

A

Connective tissue that surrounds muscles and bones.

53
Q

Epimysium

A

Inner layer of fascia that directly surrounds an entire muscle, commonly referred to as the “deep fascia.”

54
Q

Fascicles

A

Largest bundles of fibers within a muscle. Fascicles are surrounded by perimysium.

55
Q

Perimysium

A

Connective tissue surrounding a muscle fascicle

56
Q

Endomysium

A

Connective tissue that wraps around individual muscle fibers within a fascicle.

57
Q

Glycogen

A

Glucose that is deposited and stored in bodily tissues, such as the liver and muscle cells; the storage form of carbohydrate

58
Q

Myogloban

A

Protein-based molecule that carries oxygen molecules into the muscles.

59
Q

Myofibrils

A

The contractile components of a muscle cell; the myofilaments (actin and myosin) are contained within a myofibril.

60
Q

Myofilaments

A

The filaments of a myofibril; include actin and myosin.

61
Q

Actin

A

The thin, stringlike, myofilament that acts along with myosin to produce muscular contraction.

62
Q

Myosin

A

The thick myofilament that acts along with actin to produce muscular contraction.

63
Q

Sarcomere

A

The structural unit of a myofibril composed of actin and myosin filaments between two Z-lines.

64
Q

Z-line

A

The meeting point of each sarcomere.

65
Q

Action potential

A

Nerve impulse that is relayed from the central nervous system, through the peripheral nervous system, and into the muscle across the neuromuscular junction.

66
Q

Neurotransmitters

A

Chemical messengers that cross the synapse between neuron and muscle and assist with nerve transmission.

67
Q

Acetylcholine (ACh)

A

A neurotransmitter that helps the action potential cross the synapse into the muscle, which initiates the steps in a muscle contraction.

68
Q

Power stroke

A

Myosin heads bind to actin and pull them toward the sarcomere center, which slides the filamentspast each othern shortening the muscle

69
Q

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 my body

70
Q

Resting length

A

Length of a muscle when it’s not actively contacting or being stretched

71
Q

Type I muscle fiber

A

Muscle fibers that are small in size, generate lower amounts of force, and are more resistant to fatigue.

72
Q

Type II muscle fibers

A

Muscle fibers that are larger in size, generate higher amounts of force, and are faster to fatigue.

73
Q

All-or-nothing principle

A

Motor units cannot vary the amount of force they generate; they either contract maximally or not at all.

74
Q

Capillaries

A

The smallest blood vessels and the site of exchange of elements between the blood and the tissues.

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