Brainscape's Knowledge GenomeTM

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


See full index

Human Physio > Part 1 > Flashcards

Part 1 Flashcards

1
Q

What is the main function of skeletal muscle?

A

To provide force for locomotion

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

What are some other functions of skeletal muscle?

A

Acts as a reservoir for 80% of body’s water
Acts as a pool for storage of intracellular ions eg K+
Contributes to maintenance of body temp. ( its conversion of chem to mech energy generates heat)
Metabolic homeostasis
Acts as substrate source during metabolic crisis (eg starvation, organ failure)

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

What is a flexor?

A

A muscle whose contraction serves to bend a joint or limb

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

What are the 3 flexors that lie in the anterior compartment of the upper arm?

A

Biceps (biceps brachii)
Brachialis
Brachioradialis

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

What are the prime movers in the upper arm?

A

Biceps and triceps brachii

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

In terms of locomotion, what are the 3 planes we move around?

A

Coronal (frontal)
Sagittal (medial)
Transverse (axial)

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

What is a fascicle?

A

A bundle of muscle fibres

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

What is the perimysium?

A

The connective tissue which surrounds and holds together each fascicle

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

What is the epimysium?

A

The connective tissue layer that covers the surface of a muscle and holds fascicles together

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

What is the endomysium?

A

The thin connective tissue layer that surrounds and loosely binds nearby muscle fibres

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

What are the four patterns of fascicle organisation?

A

Parallel (and fusiform), convergent, pennate, circular

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

What is an example of a parallel/fusiform muscle?

A

Biceps brachii, rectus abdominis

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

What is an example of a convergent muscle?

A

Pectoralis major

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

What is an example of a pennate muscle?

A

Palmar interosseous (unipennate)

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

What is an example of a circular muscle?

A

Orbicularis oculi

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

What is the pennation angle?

A

The angle at which fibres are attached to the epimysium

17
Q

What happens to the pennation angle when a muscle contracts and shortens?

A

Pennation angle increases

18
Q

What is the effects of pennation angle on muscle velocity?

A

The larger the pennation angle, the lower the velocity

19
Q

What is the PCSA and what is it used for?

A

Physiological cross-sectional area (PCSA) is the standard measure used to approximate the number of fibres of a whole muscle

20
Q

In a parallel fibre, how does the PCSA relate to the anatomical cross-sectional muscle area?

A

They are roughly the same

21
Q

In a pennate fibre, how does the PCSA relate to the anatomical cross-sectional muscle area?

A

The PCSA is considerably larger

22
Q

What happens to the contraction force if pennation angle is increased?

A

Contraction force decreases

Human Physio (10 decks)

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