Brainscape's Knowledge GenomeTM

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


See full index

Anatomy > Ch.10 Muscles > Flashcards

Ch.10 Muscles Flashcards

1
Q

What are the muscle types

A

Skeletal, cardiac, smooth

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

Skeletal muscles

A

voluntary, striated, multinucleated and mainly attached to bones except for face

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

Muscle fiber

A

Skeletal muscle cell

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

Belly

A

Body of a muscle bundle

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

Tendons

A

connect belly to bone

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

Aponeurosis

A

sheet like tendon

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

organizational levels of skeletal muscle

A

Fascicle
Muscle fibers
Myofibrils
Thick and thin filaments

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

Fascia

A

Connective tissue that surrounds organs and muscles

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

epimysium

A

fibrous elastic tissue surrounding a muscle

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

Fascicle

A

Strands that contains the muscle fibers

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

Perimysium

A

connective tissue that surrounds Muscle Fibers

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

Endomysium

A

connective tissue that surrounds the muscle fibers

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

Sarcolemma

A

plasma membrane of a muscle fiber, sends T tubules into the cytosol

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

Sarcoplasmic reticulum

A

specialized endoplasmic reticulum that contain calcium and from triads with T tubules

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

Myoglobin

A

protein present in myocells, it binds to oxygen

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

T-tubules

A

extensions of the cell membrane that penetrate into the centre of skeletal and cardiac muscle cells

17
Q

Contractile proteins

A

generate force during contraction. Like myosin and and actin

18
Q

Regulatory proteins

A

helps switch the contraction process on and off. Like tropomyosin and troponin

19
Q

Structural proteins

A

keep the thick and thin filaments together and give elasticity. Like titin, myomesin, nebulin, and dystrophin

20
Q

What are myofibrils made of?

A

Thick filaments (myosin) and thin filaments (actin)

21
Q

Thin filaments

A

composed of actin, troponin, and tropomyosin

22
Q

active site

A

socket of the G-actin where myosin bonds into

23
Q

Tropomyosin

A

binds to the active site in a state of relaxation

24
Q

troponin

A

binds to calcium to move away the tropomyosin from the active site

25
Q

Myosin

A

Have a tail and head, they attach to the active site when the troponin binds to calcium, moving away the tropomyosin

26
Q

Sarcomere

A

arrangement of thin and thick filaments

27
Q

Zband

A

boundaries of the sarcomere, has titin for elasticity and connects it to the thick thick filament

28
Q

M line

A

midline of a myofibril and holds the contract proteins in place, it is formed by myomesin proteins

29
Q

A band

A

is where thick and thin filaments overlap

30
Q

H zone

A

here is no thin filaments and the heads of the myosin are missing

31
Q

I band

A

where thick and thin filaments do not overlap

32
Q

motor unit

A

Somatic motor neuron + muscle fibers

33
Q

Neuromuscular junction

A

where the axon terminal/ synaptic knob meets the motor endplate of the sarcolemma

34
Q

nuero transmitters of the axon terminal

A

acetylcholine

35
Q

motor end plate

A

part of the sarcolemma that meets the axon terminal/synaptic knob

36
Q

Describe how atp and movement is generated

A

Atp is generated when acetylcholine is released from the synaptic knob into the ach receptors in the motor end plate and that allows sodium cations to go through the sarcolemma. This makes the cell have a positive polarization (depolarization). Then calcium bonds to troponin that moves tropomyosin away from actin, and that allows the active site to bond with myosin can now attach to it through a cross bridge and through a power stroke slide the thin filament over it. detaches when new ATP goes to the head of the myosin

37
Q

Myasthenia gravis

A

autoimmune disease where antibodies destroy the ach receptors, causing muscle weakness

38
Q

Rigor mortis

A

movement after death because calcium is still in the body

39
Q

Muscle Hypertrophy

A

increase of actin and myosin filaments

Anatomy (10 decks)

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