Lab Exam 2: Cardiac Histology Flashcards
What type of muscle tissue makes up the heart?
Cardiac muscle tissue
True or False: Cardiac muscle cells are multinucleated.
False
What are the intercalated discs?
Specialized junctions between cardiac muscle cells that facilitate communication and synchronization.
Fill in the blank: Cardiac muscle cells are also known as ______.
Cardiomyocytes
What is the primary function of cardiac muscle tissue?
To pump blood throughout the body.
Which type of connective tissue surrounds the cardiac muscle?
Endomysium
Multiple choice: Which structure is responsible for the automaticity of the heart?
Sinoatrial (SA) node
What is the role of gap junctions in cardiac histology?
They allow for electrical impulses to pass quickly between cardiac cells.
True or False: Cardiac muscle has a longer refractory period than skeletal muscle.
True
What is the function of the pericardium?
To protect and lubricate the heart.
Fill in the blank: The ______ is the outer layer of the heart wall.
Epicardium
What are the two main types of cardiac muscle fibers?
Atrial and ventricular muscle fibers
Multiple choice: Which part of the cardiac cycle corresponds to the contraction of the heart?
Systole
What is the primary cell type found in the myocardium?
Cardiomyocytes
True or False: Cardiac muscle is capable of regeneration.
False
Fill in the blank: The ______ is the inner layer of the heart wall that lines the chambers.
Endocardium
What is the significance of the cardiac skeleton?
It provides structural support and electrical insulation between the atria and ventricles.
Multiple choice: Which of the following proteins is important for cardiac muscle contraction?
Troponin
What is the role of the coronary arteries?
To supply blood to the heart muscle itself.
True or False: The heart has a high regenerative capacity compared to skeletal muscle.
False
