Brainscape's Knowledge GenomeTM

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


See full index

Functional Anatomy > Week 5 V1 muscle contraction > Flashcards

Week 5 V1 muscle contraction Flashcards

1
Q

A muscle stimulation causing the muscles to contract/relax come from what system?

A

CNS - Central nervous system

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

The stimulus is delivered by the …

A

Neuron

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

Tendon ends are best referred to as … sites?

A

Attachment sites

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

The origin of the muscle is where…

A

No movement occurs

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

The insertion is where…

A

Joint movement occurs

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

The muscle is made of lots of longitudinal cylindrical bundles which are called?

A

Fasiculi

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

Fasiculi are…

A

Bundle of muscle fibres

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

Inside myofibrils are…

A

Myofilaments

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

Myofilaments don’t run the length of the muscle fibre but are arranged into compartments known as…

A

Sarcomeres

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

Muscle contraction occurs in the ….

A

Sarcomere

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

Contraction occurs because the …. are pulled closer together

A

Z lines

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

The thick myofilaments are…

A

Myosin

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

The thin myofilaments are…

A

Actin

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

What two systems contribute to the complete nervous system?

A

Central nervous system and peripheral nervous system

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

The central nervous system includes the?

A

Brain and spinal cord

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

The peripheral nervous system consists of?

A

The nerves that branch off the spinal cord into the body

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

The stimulus needed for a muscle to contract is delivered by a ?

A

Neuron

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

There are 4 main parts of a neuron:

A

Dendrites, cell body (SOMA), axon, neuromuscular junction

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

Dendrites..

A

Receive messages from cells and pass it onto the SOMA

20
Q

Soma…

A

Directs the activities

21
Q

Axon…

A

Conducts impulses (messages) away from the soma and finishes at the dendrite terminal

22
Q

Neuromuscular junction…

A

Where the muscle is stimulated

23
Q

The length of some nerves causes the creation of?

A

Neuron chains

24
Q

Neuron chains are…

A

Neurons that are linked together. The axons pass the stimulus to another neuron instead of to the neuromuscular junction

25
Q

When the impulse reaches the end of the axon, it triggers the release of a transmitter substance called?

A

Acetylcholine (ACh)

26
Q

True of false; one neuron can stimulate more than one muscle fibre?

A

True

27
Q

What is a motor unit?

A

The neuron and all the muscle fibres it stimulates

28
Q

To generate or sustain force the motor units are?

A

Stimulated more

29
Q

Increasing … of stimulation decreases time between impulses

A

Frequency

30
Q

The mechanical aspect of muscle contraction is called?

A

The sliding filament theory

31
Q

Once the impulse reaches the muscle fibres it stimulates a reaction with each …. between the …. and ….

A

Sarcomere. Actin and myosin

32
Q

Myosin is the .. myofilament and actin is the … myofilament

A

Thick and thin

33
Q

The end result is that each … reduces its length and thus reduces the fibre length, causing movement at the …

A

Sarcomere. Insertion

34
Q

Stimulation causes the … to bind with the … cross bridges

A

Actin. Myosin

35
Q

The cross bridges attach to … myosin binding sites

A

2

36
Q

In the presence of … the …. moves

A

Energy. Cross bridges

37
Q

Each myosin cross bridge has an …. binding site

A

Adenosine Triphosphate (ATP)

38
Q

Muscle stimulation causes … to split while attached to the cross bridge

A

ATPase (enzyme)

39
Q

The splitting of ATPase releases…

A

Energy

40
Q

After this contraction … occurs unless stimulated again

A

Decoupling

41
Q

What is required to recombine ADP + Pi = ATP to enable the process to continue?

A

Energy

42
Q

Nerve stimulus from the … terminal causes the sarcoplasmic reticulum to release … which binds to troponin - tropomyosin

A

Axon. Calcium

43
Q

Troponin - … moves out the way, exposing cross bridge attachment sites for …, allowing the …. process to occur

A

Tropomyosin. Actin. Contraction

44
Q

A nerve impulse reaching the …. causes …. to be released causing its continuation into the muscle

A

Axon terminal. Acetylcholine

45
Q

The … reticulum releases … causing tropomyosin complex to move exposing the ….

A

Sarcoplasmic. Myosin binding sites

46
Q

Myosin binds to actin as … is split allowing cross bridge movement to occur, and force to be developed as the sarcomeres shorten

A

ATP

47
Q

The muscle as a whole shortens when all the fibres of the …. are stimulated

A

motor units

Functional Anatomy (7 decks)

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