Muscle Tissue

Question 1

This tissue type is multinucleated, autonomic, striated and has nucleuses in the periphery

Answer 1

Skeletal Muscle

Question 2

This tissue type if mononucleated, involuntary and not striated. The nucleus is centrally located that is elongated.

Answer 2

Smooth Muscle

Question 3

This tissue is striated, involuntary and mononucleated with a centrally present nucleus. It has intercalated discs.

Answer 3

Cardiac

Question 4

This myofiber type has a dark NAS staining, a surplus of mitochondria, low ATPase use which uses oxidative phosphorylation. It is also more resistant to fatigue.

Answer 4

Myofiber Type I

Question 5

This myofiber type stains lighter than Type I, using both aerobic and anaerobic respiration and resistant to fatigue. It also contracts more rapidly than Type I.

Answer 5

Myofiber Type 2A

Question 6

This myofiber type stains very lightly, has a low presence of mitochondira, prone to fatigue and uses anerobic respiration. It contracts more rapidly than the other subtypes.

Answer 6

Myofiber 2B

Question 7

A Beta-Crystallin

Answer 7

Heat shock protein that protects desmin from mechanical stress (chaperone)

Question 8

Nebulin

Answer 8

Positioned parallel to actin filament (Z-disc to end), it serves as a stabilizer for the thin filaments of actin.

Question 9

Titin

Answer 9

Titin, extending from z disc to m line of the H band connecting ends of the thick filament, regulates elasticity of sarcomere.

Question 10

Dystrophin

Answer 10

Links alpha actinin/desmin complex to cytoplasmic side of sarcolemma. Anchors actin to sarcolemma. Reinforces sarcolemma during muscle contraction

Question 11

Dystrophin Complex

Answer 11

Links dystrophin to laminin-2

Question 12

Alpha Actinin

Answer 12

Attaches thin filaments to Z-line

Question 13

Desmin Intermediate filaments

Answer 13

Framework of desmin filaments which surrounds zline and extends into sarcomere. Links myofibrils laterally and to sarcolemma.

Question 14

Plectin

Answer 14

Binds desmin filaments

Question 15

What are satellite cells for?

Answer 15

Satellite cells are good for bulking up existing muscle, repairing muscle and also involved in hematopoiesis.

Question 16

Extrafusal muscle fibers supplied by ____ and Infrafusal fibers supplied by ____

Answer 16

Alpha Motor

Gamma Motor

Question 17

What is the function of neuromuscular spindles?

Answer 17

It acts as a moderator for maintaining muscle tone via feedback to the CNS.

Question 18

Cardiac tissue interact with ___ cisternae forming ____. Skeletal muscles interact with ___ forming____.

Answer 18

1, diads

2, triads

Question 19

What is the single longitudinal component of the intercalated disc?

Answer 19

Gap Junctions

Question 20

What are the three components of the intercalated disc?

Answer 20

Gap Junctions, Macula Adherentes and Fascia Adherentes.

Question 21

ANP are stored as ___ in vesicles within ____ muscle cells

Answer 21

Prohormone

Atrial

Question 22

What are dense bodies and what are their functions?

Answer 22

Densely stained spots in smooth muscles that anchor actin filaments to each other and cell membrane. Also communicate force of contraction to cytoskeleton and cell membrane

Question 23

Ca for smooth muscle comes from ___. In skeletal and cardiac muscle, CA comes from ___.

Answer 23

Extracellular fluid

SR

Question 24

Calveolae and lipid rafts function to ___

Answer 24

Transport fluid and electrolytes