CH.2 BASIC EXERCISE SCIENCE PT.2 Flashcards
PRIMARY CONNECTIVE TISSUE THAT CONNECTS BONES TOGETHER AND PROVIDES STABILITY, INPUT TO THE NERVOUS SYSTEM, GUIDANCE AND LIMITATION OF IMPROPER JOINT MOVEMENT
LIGAMENT
LIGAMENTS ARE PRIMARILY MADE UP OF WHAT PROTEINS
COLLAGEN AND ELASTIN
GIVES LIGAMENTS SOME FLEXIBILITY OR ELSATIC RECOIL TO WITHSTAND BENDING AND TWISTING
ELASTIN
LIGAMENTS DO NOT HEAL OR REPAIR VERY WELL DUE TO WHAT ?
POOR VASCULARITY (OR BLOOD SUPPLY)
BEST KIND OF EXERCISE TO HELP STRENGTHEN BONES BECAUSE IT FORCES BONES TO WORK AGAINST GRAVITY
WEIGHT BEARING EXERCISE
SERIES OF MUSCLES THAT MOVES THE SKELETON
MUSCULAR SYSTEM
MOVERS AND STABILIZERS OF OUR BODIES
MUSCLES
MADE UP OF INDIVIDUAL MUSCLE FIBERS
SKELETAL MUSCLE
LAYER OF CONNECTIVE TISSUE THAT IS UNDERNEATH THE FASCIA AND SURROUNDS THE MUSCLE
EPIMYSIUM
CONNECTIVE TISSUE THAT SURROUNDS FASCICLES
PERIMYSIUM
DEEPEST LAYER OF CONNECTIVE TISSUE THAT SURROUNDS INDIVIDUAL MUSCLE FIBERS
ENDOMYSIUM
CONNECTIVE TISSUE THAT ATTACH MUSCLE TO BONE AND PROVIDE AN ANCHOR FOR MUSCLES TO PRODUCE FORCE
TENDONS
ALLOW FORCES GENERATED BY THE MUSCLE TO BE TRANSMITTED FROM THE CONTRACTILE COMPONENTS OF THE MUSCLE TO THE BONES, CREATING MOTION
CONNECTIVE TISSUE
T OR F: SIMILAR TO LIGAMENTS, TENDONS HAVE POOR VASCULARITY (BLOOD SUPPLY) AND ARE SUSCEPTIBLE TO SLOWER REPAIR AND ADAPTATION.
TRUE
FUNCTIONAL UNIT OF MUSCLE THAT PRODUCES MUSCULAR CONTRACTION AND CONSISTS OF REPEATING SECTIONS OF ACTIN AND MYOSIN
SARCOMERE
CONTAIN MYOFILAMENTS THAT ARE ACTUAL CONTRACTILE COMPONENTS OF MUSCLE TISSUE
MYOFIBRILS
THIN STRINGLIKE FILAMENTS
ACTIN
THICK FILAMENTS
MYOSIN
SARCOMERES ARE FORMED BY WHAT ?
ACTIN (THIN) AND MYOSIN (THICK) FILAMENTS
2 PROTEIN STRUCTURES THAT ARE IMPORTANT TO MUSCLE CONTRACTION
TROPOMYOSIN AND TROPONIN
LOCATED ON ACTIN FILAMENT AND BLOCKS MYOSIN BINDING SITES LOCATED ON THE ACTIN FILAMENT, KEEPING MYOSIN FROM ATTACHING TO ACTIN WHEN MUSCLE IS IN A RELAXED STATED
TROPOMYOSIN
LOCATED ON ACTIN FILAMENT, PROVIDES BINDING SITES FOR BOTH CALCIUM AND TROPOMYOSIN WHEN MUSCLE NEEDS TO CONTRACT
TROPONIN
CONTRACTION OF MUSCLE GENERATED BY NEURAL STIMULATION
NEURAL ACTIVATION
MOTOR NEURON AND ALL OF THE MUSCLE FIBERS IT INNERVATES
MOTOR UNIT
CHEMICAL MESSENGERS THAT CROSS THAT NEUROMUSCULAR JUNCTION (SYNAPSE) TO TRANSMIT ELECTRICAL IMPULSES FROM THE NERVE TO THE MUSCLE
NEUROTRANSMITTERS
SKELETAL MUSCLES WILL NOT CONTRACT UNLESS THEY ARE STIMULATED BY WHAT ?
MOTOR NEURONS
COMMUNICATION LINK BETWEEN THE NERVOUS SYSTEM AND THE MUSCULAR SYSTEM
NEURAL ACTIVATION
MOTOR NEURONS ORIGINATING FROM CNS COMMUNICATE WITH MUSCLE FIBERS THROUGH A SPECIALIZED SYNAPSE CALLED WHAT ?
NEUROMUSCULAR JUNCTION
TRANSPORTED FROM THE CNS DOWN THE AXON OF THE NEURON
ELECTRICAL IMPULSES (ACTION POTENTIALS)
NEUROTRANSMITTER USED BY THE NEUROMUSCULAR SYSTEM
ACETYLCHOLINE (ACH)
STIMULATES MUSCLE FIBERS TO GO THROUGH A SERIES OF STEPS THAT INITIATES MUSCLE CONTRACTIONS
ACH
PROCESS OF NEURAL STIMULATION CREATING A MUSCLE CONTRACTION
EXCITATION-CONTRACTION COUPLING
SLIDING FILAMENT THEORY
- SARCOMERE SHORTENS AS A RESULT OF Z LINES MOVING CLOSER TOGETHER
- Z LINES CONVERGE AS RESULT OF MYOSIN HEADS ATTACHING TO ACTIN FILAMENT AND ASYNCHRONOUSLY PULLING (POWER STROKES) ACTIN FILAMENT ACROSS MYOSIN, RESULTING IN SHORTENING OF MUSCLE FIBER
SINGLE MOTOR UNITS CONSIST OF WHAT ?
ONE MOTOR NEURON (NERVE) AND THE MUSCLE FIBERS IT INNERVATES
“ALL OR NOTHING” LAW
MOTOR UNITS CANNOT VARY THE AMOUNT OF FORCE THEY GENERATE; THEY EITHER CONTRACT MAXIMALLY OR NOT AT ALL
OVERALL STRENGTH OF A SKELETAL MUSCLE CONTRACTION WILL DEPEND ON WHAT ?
THE SIZE OF THE MOTOR UNIT RECRUITED (I.E. HOW MANY MUSCLE FIBERS ARE CONTAINED WITHIN THE UNIT) AND THE NUMBER OF MOTOR UNITS THAT ARE ACTIVATED AT A GIVEN TIME
SIZE OF MOTOR UNITS MAKING UP A PARTICULAR MUSCLE WILL RELATE DIRECTLY TO WHAT ?
THE FUNCTION OF THAT MUSCLE
2 MAIN CATEGORIES OF MUSCLE FIBERS
TYPE 1 & TYPE 2 FIBERS
REFERRED TO AS RED FIBERS
TYPE 1 (SLOW TWITCH)
MUSCLE FIBERS THAT CONTAIN LARGE NUMBER OF CAPILLARIES, MITOCHONDRIA (TRANSFORM ENERGY FROM FOOD INTO ATP, OR CELLULAR ENERGY) AND MYOGLOBIN, WHICH ALLOWS FOR IMPROVED DELIVERY OF OXYGEN
TYPE 1 (SLOW TWITCH)
SUBDIVISIONS OF TYPE 2 (FAST TWITCH) MUSCLE FIBERS
TYPE 2A AND TYPE 2X