Podcast
Questions and Answers
What is the approximate length of a cardiac muscle cell?
What is the approximate length of a cardiac muscle cell?
- 1000 μm
- 100 μm (correct)
- 10000 μm
- 10 μm
Where are T-tubules located in cardiac muscle cells?
Where are T-tubules located in cardiac muscle cells?
- A-I junction
- M-line
- H-zone
- Z-line (correct)
What is the primary fuel source for cardiac muscle cells?
What is the primary fuel source for cardiac muscle cells?
- Glucose
- Ketone bodies
- Fatty acids (correct)
- Amino acids
What type of junction is found in the longitudinal part of an intercalated disc?
What type of junction is found in the longitudinal part of an intercalated disc?
Which layer of the heart wall contains Purkinje fibers?
Which layer of the heart wall contains Purkinje fibers?
What is the main function of atrial natriuretic factor (ANF)?
What is the main function of atrial natriuretic factor (ANF)?
Which layer of the heart wall is the thickest?
Which layer of the heart wall is the thickest?
What type of epithelium lines the endocardium?
What type of epithelium lines the endocardium?
Which part of the intercalated disc is responsible for the strong adhesion of cardiac muscle cells?
Which part of the intercalated disc is responsible for the strong adhesion of cardiac muscle cells?
Which structure is more abundant in cardiac muscle compared to skeletal muscle?
Which structure is more abundant in cardiac muscle compared to skeletal muscle?
Why are striations less distinct in cardiac muscle compared to skeletal muscle?
Why are striations less distinct in cardiac muscle compared to skeletal muscle?
What is the functional significance of the abundance of mitochondria in cardiac muscle cells?
What is the functional significance of the abundance of mitochondria in cardiac muscle cells?
A histological slide shows a cardiac muscle fiber with a diad located at the Z-line. What does this diad consist of?
A histological slide shows a cardiac muscle fiber with a diad located at the Z-line. What does this diad consist of?
Which component of the intercalated disc allows for the rapid spread of electrical signals between cardiac muscle cells?
Which component of the intercalated disc allows for the rapid spread of electrical signals between cardiac muscle cells?
Which layer of the heart wall is responsible for the heart's pumping action?
Which layer of the heart wall is responsible for the heart's pumping action?
Which hormone has an antagonistic effect to ANF?
Which hormone has an antagonistic effect to ANF?
Which feature distinguishes Purkinje fibers from ordinary cardiac muscle fibers?
Which feature distinguishes Purkinje fibers from ordinary cardiac muscle fibers?
Which layer of the heart wall is continuous with the lining of blood vessels?
Which layer of the heart wall is continuous with the lining of blood vessels?
Which structure is found in the subendocardial layer and is responsible for transmitting electrical signals to the ventricular muscle?
Which structure is found in the subendocardial layer and is responsible for transmitting electrical signals to the ventricular muscle?
Which cell type is responsible for the endocrine function of the heart?
Which cell type is responsible for the endocrine function of the heart?
Which structure is a unique feature of cardiac muscle and plays a crucial role in synchronized contraction?
Which structure is a unique feature of cardiac muscle and plays a crucial role in synchronized contraction?
Which structure is responsible for the structural integrity of the heart wall and prevents overdistension?
Which structure is responsible for the structural integrity of the heart wall and prevents overdistension?
Which component of the intercalated disc contributes to the mechanical coupling of cardiac muscle cells?
Which component of the intercalated disc contributes to the mechanical coupling of cardiac muscle cells?
Which layer of the heart wall is composed of simple squamous mesothelium and loose connective tissue?
Which layer of the heart wall is composed of simple squamous mesothelium and loose connective tissue?
Which structure is responsible for the electrical insulation between atria and ventricles?
Which structure is responsible for the electrical insulation between atria and ventricles?
Which feature allows for the efficient diffusion of nutrients and oxygen in cardiac muscle tissue?
Which feature allows for the efficient diffusion of nutrients and oxygen in cardiac muscle tissue?
Which structure is responsible for the initiation of the heartbeat?
Which structure is responsible for the initiation of the heartbeat?
Which feature contributes to the rhythmic contraction of the heart?
Which feature contributes to the rhythmic contraction of the heart?
Which structure is responsible for the rapid conduction of electrical impulses throughout the ventricles?
Which structure is responsible for the rapid conduction of electrical impulses throughout the ventricles?
Which feature allows for the coordinated contraction of cardiac muscle cells within a fiber?
Which feature allows for the coordinated contraction of cardiac muscle cells within a fiber?
Flashcards are hidden until you start studying
