Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CSCS > CH 1 > Flashcards

CH 1 Flashcards

master concepts related to structure and function of muscular and neuromuscular system related to exercise

1
Q

EPIMYSIUM

A

CONNECTIVE TISSUE THAT SURROUNDS THE MUSCLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

FASCICULI

A

BUNDLES OF MUSCLE FIBERS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

PERIMYSIUM

A

CONNECTIVE TISSUE THAT SURROUNDS FASCICULI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

ENDOMYSIUM

A

CONNECTIVE TISSUE THAT SURROUNDS INDIVIDUAL MUSCLE FIBER

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

SARCOLEMMA

A

MUSCLE FIBER MEMBRANE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

HOW MANY NEUROMUSCULAR JUNCTIONS DOES ONE MUSCLE CELL HAVE?

A

ONE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A SINGLE MOTOR NEURON INNERVATES HOW MANY MUSCLE CELLS?

A

MANY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

SARCOPLASM

A

CYTOPLASM OF MUSCLE FIBER THAT CONTAINS CONTRACTILE COMPONENTS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

MYOFIBRILS

A

CONTAIN CONTRACTION APPARATUS OF MUSCLE CELL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

MYOSIN

A

THICK FILAMENTS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

ACTIN

A

THIN FILAMENTS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

MYOSIN CROSS BRIDGES

A

GLOBULAR HEADS THAT PROTRUDE FROM THE MYOSIN FILAMENT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A-BAND

A

DARK BAND CORRESPONDS TO ALIGNMENT OF MYOSIN FILAMENTS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

I-BAND

A

LIGHT BAND, CORRESPONDS TO AREAS IN 2 ADJACENT SARCOMERES THAT CONTAIN ONLY ACTIN

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Z-LINE

A

THIN DARK LINE RUNNING VERTICALLY THROUGH I-BAND

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

H-ZONE

A

AREA IN CENTER OF SARCOMERE WHERE ONLY MYOSIN FILAMENTS ARE PRESENT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

SARCOPLASMIC RETICULUM

A

SYSTEM OF TUBULES THAT HOUSE CALCIUM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

T TUBULES

A

CONTINUOUS WITH SARCOLEMMA AT SURFACE OF THE CELL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

SLIDING FILAMENT THEORY RESTING PHASE

A

MOST OF CALCIUM IS IN SARCOPLASMIC RETICULUM, NO TENSION IN MUSLCE

20
Q

SLIDING FILAMENT THEORY

A
  1. SARCOPLASMIC RETICULUM STIMULATED TO RELEASE CALCIUM
  2. CALCIUM BINDS WITH TROPONIN, CAUSING TROPOMYOSIN ON ACTIN TO SHIFT AND REVEAL ATTACHMENT SITES
  3. MYOSIN CROSSBRIDGE HEAD ATTACHES TO ACTIN
  4. MYOSIN CROSSBRIDGES FLEX, PULLING ON ACTIN, RESULTING IN MUSCLE CONTRACTION
21
Q

ATP

A

ENERGY SOURCE REQUIRED FOR CROSS BRIDGE FLEXION, DETACHMENT, AND RECOCKING

22
Q

WHAT IS REQUIRED FOR MUSCLE CONTRACTION TO CONTINUE?

A

ADEQUATE AMMOUNTS OF CALCIUM, ATP, AND MYOSIN ATPase

23
Q

SLIDING FILAMENT THEORY

RELAXATION PHASE

A

OCCURS WHEN MOTOR NERVE STIMULATION STOPS ND CALCIUM IS PUMPED BACK INTO SARCOPLASMIC RETICULUM. MYOSIN AND ACTIN FILAMENTS RETURN TO UNBOUND STATE

24
Q

EXTENT OF CONTROL OF A MUSCLE DEPENDS ON WHAT?

A

NUMBER OF MUSCLE FIBERS WITHIN EACH MOTOR UNIT

25
Q

ACETYLCHOLINE

A

NEUROTRANSMITTER RELEASED AT NEUROMUSCULAR JUNCTION CAUSING EXCITATION OF SARCOLEMMA

26
Q

ALL OR NONE PRINCIPLE

A

ALL MUSCLE FIBERS IN THE STIMULATED MOTOR UNIT CONTRACT AND DEVELOP FORCE AT THE SAME TIME. THERE IS NO SUCH THING AS A MOTOR NEURON STIMULUS THAT CAUSES ONLY SOME OF THE FIBERS TO CONTRACT.

27
Q

CAN A STRONGER ACTION POTENTIAL CAUSE A STRONGER CONTRACTION

A

NO

28
Q

TWITCH

A

SHORT PERIOD OF ACTIVATION OF MUSCLE FIBERS WITHIN MOTOR UNIT RESULTING IN BRIEF CONTRACTION

29
Q

SUMMATION

A

WHEN SECOND TWITCH IS ELICITED BY THE MOTOR NERVE BEFORE FIBERS COMPLETELY RELAX, RESULTING IN GREATER FORCE GENERATION THAN THAT PRODUCED BY SINGLE TWITCH

30
Q

TETANUS

A

RESULT OF STIMULUS BEING DELIVERED AT SO HIGH A FREQUENCY THAT THE TWITCHES MERGE, RESULTING IN MOTOR UNIT PRODUCING MAXIMAL FORCE

31
Q

FAST TWITCH FIBER

A

MOTOR UNIT THAT DEVELOPS FORCE AND RELAXES QUICKLY, SHORT TWITCH TIME

32
Q

SLOW TWITCH FIBER

A

DEVELOP FORCE AND RELAX SLOWLY, LONG TWITCH TIME

33
Q

TYPE I FIBER

A

SLOW TWITCH

34
Q

TYPE I FIBER CHARACTERISTICS

A 
EFFICIENT
FATIGUE RESISTANT
HIGH CAPACITY FOR AEROBIC ENERGY SUPPLY
LIMITED POTENTIAL FOR RAPID FORCE DEVELOPMENT
LOW ANAEROBIC POWER
35
Q

TYPE II FIBER

A

FAST TWITCH

36
Q

TYPE II FIBER CHARACTERISTICS

A 
INEFFICIENT
FATIGABLE
LOW AEROBIC POWER
RAPID FORCE DEVELOPMENT
HIGH ANAEROBIC POWER
37
Q

WHICH HAS GREATER RESISTANCE TO FATIGUE TYPE IIA OR TYPE IIX FIBERS

A

TYPE II A FIBERS SHOW GREATER RESISTANCE TO FATIGUE

38
Q

SKELETAL MUSCLE FORCE OUTPUT IS INCREASED BY

A

INCREASED FREQUENCY OF FIRING OF INDIVIDUAL MOTOR UNITS AND RECRUITING ADDITIONAL MOTOR UNITS

39
Q

PRELOADING

A

ACT OF LOADING MUSCLE PRIOR TO MUSCLE ACTION TO ALLOW FOR FULL ACTIVATION OF FIBERS THAT ARE ACTIVE EARLY IN THE ROM

40
Q

PROPRIOCEPTORS

A

SPECIALIZED SENSORY RECEPTORS LOCATED WITHIN JOINTS, MUSCLES AND TENDONS THAT ARE SENSITIVE TO PRESSURE AND TENSION

41
Q

MUSCLE SPINDLES

A

PROVIDE INFORMATION REGARDING MUSCLE LENGTH AND RATE OF CHANGE OF LENGTH

42
Q

FUNCTION OF MUSCLE SPINDLES

A

INDICATE THE DEGREE TO WHICH THE MUSCLE MUST BE ACTIVATED IN ORDER TO OVERCOME A GIVEN RESISTANCE.
FACILITATE ACTIVATION OF THE MUSCLE

43
Q

GOLGI TENDON ORGANS

A

INHIBIT MUSCLE ACTIVATION AS MUSCLE TENSION INCREASES

44
Q

REFLEXIVE INHIBITION

A

GTO MEDIATED MUSCLE RELATION THAT OCCURS WHEN AN EXTREMELY HEAVY LOAD IS PLACED ON THE MUSCLE.

45
Q

SARCOPENIA

A

REDUCED MUSCLE SIZE AND STRENGTH TYPICALLY RESULTING FROM AGING OR INACTIVITY

46
Q

MUSCLE ATROPHY WITH AGING RESULTS FROM

A

LOSS IN NUMBER AND SIZE OF FIBERS, PARTICULARLY TYPE II

CSCS (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions