Structure
What are the three types of muscle?
Skeletal, Smooth and Cardiac
What is the main function of skeletal muscle
Movement/stability
What is the name of the type of muscle only located in the heart?
Cardiac muscle
T or F: Skeletal muscle is uni-nucleated?
False
T or F: Cardiac muscle works voluntarily
False
T of F: the name of the think filament is actin
False - it is myosin
Sarcoplasmic reticulum
T or F: Cardiac muscle is located in other areas of the body besides the heart such as the lungs and liver
False - it is only in the heart
What is the name of the neurotransmitter located within the neuromuscular junction?
Acetylcholine
What is the A-band?
location in the sarcomere where actin and myosin interact
T or F: The main functions of smooth muscle are: peristalsis, uterine contractions, and pupil dilation
true
Name the structure which define the boundaries of the sarcomere.
Z-line
- The t-tubules
- The sarcoplasmic reticulum
- The cell membrane
1. The cell membrane
2. The t-tubules
3. The sarcoplasmic reticulum
What is the correct order of these events?
- Calcium ion binds to troponin
- The sarcoplasmic reticulum becomes depolarized
- Acetylcholine is released into the NMJ
- ATP -> ADP + P on the active site of myosin
1. Acetylcholine is released into the NMJ
2. The sarcoplasmic reticulum becomes depolarized
3. Calcium ion binds to troponin
4. ATP -> ADP + P on the active site of myosin
Name the myofilament which holds the protein structure that binds onto calcium ions in order to expose myosin binding sites.
actin