Muscular Tissue 3: Cardiac Tissue

Question 1

TRUE OR FALSE, Cardiomyocytes are also striated muscle tissue.

Answer 1

TRUE
Cardiomyocytes are also Striated Muscles

Also has myofibrilles and reticulum sacroplasmic and systeme T

le système T n’est présent qu’au niveau des disques Z soit seulement une fois par sarcom

Are much shorter cells and their nuclei is centered

There is no “plaque motrice” (neuromuscular junction)

Question 2

What is one characteristic of cardiomyocytes?

Answer 2

They are ramified

Question 3

What is a nexus?

Answer 3

Lateral side junction of cells: Nexus:

Gap Junctions → ion passage → synchronized beating

Question 4

What holds together cell-cell junctions?

Answer 4

Desmosomes and adherents at cell-cell junctions

Question 5

What are Cellules cardionectrices?

Answer 5

Cardiomyocytes pauvres en myofibrilles
spécialisés dans l’initiation et la conduction
de la contraction

Reliées entre elles pour former un réseau

Nœud sino-auriculaire : ‘’pace-maker’’

Question 6

What does the parasympathetic and sympathetic innervate at the heart level?

Answer 6

Parasympathetic system innervates the SA Node

Sympathetic System innervating all the myocardium.