Muscle Tissue

Question 1

What are the 3 types of muscle tissue in the human body?

Answer 1

• Skeletal
• Cardiac
• Smooth

Question 2

What are the properties of skeletal muscle tissue?

Answer 2

• Elongated, cylindrical cells
• Striated
• MULTIPLE PERIPHERALLY LOCATED NUCLEI
• Voluntary movement of skeleton

Question 3

Looking at a cross section of muscle tissue, what are the different layers?

Answer 3

Endomysium - each muscle fiber is covered by endomysium

Perimysium - these fibers group to form a fascicle which is wrapped by perimysium

Epimysium - Coating of the entire muscle

Question 4

What is a sarcomere?

Answer 4

A basic contractile unit of muscle fibers

Question 5

What is sarcolemma?

Answer 5

A specialised cell membrane which surrounds striated muscle fiber cells

Question 6

What are the properties of cardiac muscle?

Answer 6

• Found only in the heart
• Specialised for continuous autonomous contractions
• Greater number of mitochondria

Question 7

What is the structure of cardiac muscle?

Answer 7

• Elongated, branched cylindrical cells
• One or two centrally located nuclei
• Straited

Question 8

What are the 3 layers in the heart wall?

Answer 8

Pericardium: Outer supporting tissue layer
Myocardium: Cardiac muscle tissue
Endocardium: single layer of endothelial cells

Question 9

What are intercalated discs and in which muscle tissue are they found?

Answer 9

Cardiac

Found between myocardial cells of the heart and play a vital role of bonding them together as well as transmitting signals between them

Question 10

What is the structure and properties of smooth muscle?

Answer 10

• Found lining hollow organs
• Specialised for continuous contractions (peristalsis)
• Small, elongated, spindle-shaped cells with tapered ends
• Single centrally located nuclei
• No sarcomeres hence no striations

Question 11

What has to be present for a muscle to be striated in appearance?

Answer 11

Sarcomere