Muscles and Movement Flashcards
1
Q
What are the 3 muscle types?
A
- Smooth Muscle
- Cardiac Muscle
- Skeletal Muscle
2
Q
What is smooth muscle?
A
- Involuntary
- Controlled by the autonomic nervous system
- E.g. Gut, uterus, bladder, blood vessels, diaphragm
- short, spindle, shaped cells, no cross-striations
3
Q
What is the structure of smooth muscle?
A
- short, spindle, shaped cells, no cross-striations
4
Q
What are examples of smooth muscle?
A
- E.g. Gut, uterus, bladder, blood vessels, diaphragm
5
Q
What is cardiac muscle?
A
- Only found in the heart walls
- contains atrial, ventricular, and excitotory muscle fibres
- cells are highly branched with toughened cell membrane called intercalated discs.
6
Q
What is the structure of cardiac muscles?
A
- cells are highly branched with toughened cell membrane called intercalated discs.
7
Q
Where is cardiac muscle found?
A
- in the heart walls
8
Q
What is the structure of skeletal muscle?
A
- contains a lot of mitochondria
- muliti-nucleate
-sarcoplasmic recticulum - myofribrils - contains sarcomeres which contains actin and myosin
9
Q
How is smooth muscle stimulated?
A
- Autonomic system
10
Q
How does smooth muscle appear under the microscope?
A
- spindle shaped
- squashed, short
- unucleate
11
Q
What is the activity of the smooth muscles like?
A
- Slow to fatigue, involuntary
12
Q
How is the skeletal muscle stimulated?
A
- Somatic nervous system
13
Q
How does skeletal muscle appear under the microscope?
A
- elongated, banded fibres
14
Q
What is the activity of the skeletal muscles like?
A
- fatigue, quickly
- voluntary
15
Q
What are examples of where the skeletal muscle is found?
A
- diaphragm
