Muscles Flashcards
What are the three main types of muscle tissue in the human body?
Skeletal, cardiac, and smooth muscle.
True or False: Skeletal muscle is involuntary.
False.
Fill in the blank: __________ muscle is responsible for pumping blood throughout the body.
Cardiac.
Which type of muscle is striated and under voluntary control?
Skeletal muscle.
What type of muscle tissue is found in the walls of hollow organs?
Smooth muscle.
True or False: Cardiac muscle can regenerate quickly after injury.
False.
What is the primary function of smooth muscle?
To facilitate involuntary movements such as digestion and blood vessel constriction.
What is the characteristic feature of cardiac muscle cells?
They are interconnected by intercalated discs.
Which muscle type is responsible for voluntary movements like walking and lifting?
Skeletal muscle.
Fill in the blank: Cardiac muscle is __________ in nature.
Involuntary.
What kind of muscle tissue is not striated?
Smooth muscle.
True or False: Skeletal muscle fibers can be multinucleated.
True.
Which muscle type has a single nucleus per cell?
Smooth muscle.
What type of muscle tissue is found only in the heart?
Cardiac muscle.
Fill in the blank: Smooth muscle contractions are typically __________.
Slow and sustained.
What triggers the contraction of cardiac muscle?
Electrical impulses from the heart’s pacemaker.
Which type of muscle is primarily responsible for posture?
Skeletal muscle.
True or False: Smooth muscle is found in the respiratory tract.
True.
What is the role of calcium ions in muscle contraction?
They initiate the contraction process by binding to regulatory proteins.
Fill in the blank: The __________ is the functional unit of skeletal muscle.
Sarcomere.
Which type of muscle has a high endurance capacity?
Cardiac muscle.
What is the main energy source for muscle contraction?
Adenosine triphosphate (ATP).
True or False: All muscle types can undergo hypertrophy.
False.
What is the primary role of skeletal muscle?
To facilitate voluntary movements and maintain body posture.
