#1
Which type of muscle tissue is under voluntary control?
Smooth muscle
Cardiac muscle
Skeletal muscle
Striated muscle
#2
Which of the following is NOT a characteristic of smooth muscle tissue?
Striated appearance
Involuntary control
Spindle-shaped cells
Found in walls of hollow organs
#3
Which of the following statements about skeletal muscle fibers is true?
They are multinucleated and under involuntary control
They are uninucleated and under voluntary control
They are uninucleated and under involuntary control
They are multinucleated and under voluntary control
#4
Which of the following is NOT a function of skeletal muscle?
Generation of heat
Movement of bones
Regulation of blood pressure
Maintenance of posture
#5
Which type of muscle tissue contains intercalated discs?
Smooth muscle
Cardiac muscle
Skeletal muscle
Striated muscle
#6
Which of the following statements about cardiac muscle tissue is true?
It is striated and under involuntary control
It is non-striated and under voluntary control
It is non-striated and under involuntary control
It is striated and under voluntary control
#7
What is the functional unit of a skeletal muscle fiber?
Sarcomere
Myofibril
Myofilament
Muscle fiber
#8
Which protein is primarily responsible for muscle contraction?
Myosin
Actin
Troponin
Tropomyosin
#9
Which neurotransmitter is responsible for the contraction of skeletal muscle fibers?
Acetylcholine
Norepinephrine
Dopamine
Serotonin
#10
What is the role of calcium ions in muscle contraction?
Activate myosin heads
Prevent actin-myosin binding
Release neurotransmitters
Expose binding sites on actin
#11
What is the main function of smooth muscle tissue?
Voluntary movement
Involuntary movement
Heart contraction
Breathing
#12
What is the primary function of the sarcoplasmic reticulum in muscle cells?
Produce ATP
Store and release calcium ions
Generate action potentials
Facilitate neurotransmitter release
#13
Which type of muscle tissue is found in the walls of blood vessels and airways?
Skeletal muscle
Cardiac muscle
Smooth muscle
Striated muscle
#14
Which structure connects the muscle to bone?
Tendon
Ligament
Cartilage
Bursa
#15
Which molecule binds to calcium ions and triggers the movement of tropomyosin during muscle contraction?
Myosin
Actin
Troponin
Tropomyosin