BIOS 252 EXAM 1 (2026/2027) QUESTIONS AND
CORRECT ANSWERS GRADED A+
Which type of muscle tissue would best be described as long, thin, cylindrical,
multinucleated, and voluntary?
A. Smooth muscle
B. Skeletal muscle
C. Non-striated muscle
D. Cardiac muscle
B. Skeletal muscle
Intercalated discs are only found in __________________.
A. smooth muscle tissue
B. cardiac muscle tissue
C. voluntary muscle tissue
D. skeletal muscle tissue
B. cardiac muscle tissue
Which muscle type is found in blood vessels?
A. Striated muscle
B. Smooth muscle
C. Skeletal muscle
D. Cardiac muscle
,B. Smooth muscle
Which of the following is a function of smooth muscle?
A. Moving food through the digestive system
B. Pumping blood in the heart
C. Voluntary contraction
D. Blinking your eye
A. Moving food through the digestive system
The neurotransmitter used at the neuromuscular junction is acetylcholine (ACh).
A. True
B. False
A. True
Skeletal muscle fiber is considered to be multinucleated.
A. True
B. False
A. True
The fixed point of a lever system that the movement is applied to is known as
the_______________.
A. action
,B. effort
C. fulcrum
D. load
C. fulcrum
Place the events of excitation in the correct order, from first to last.
1. Ion channels on the sarcolemma open and sodium ions enter the muscle fiber.
2. The entry of sodium ions into the muscle fiber depolarizes the sarcolemma
locally.
3. Acetylcholine is released from vesicles in the motor neuron into the synaptic
cleft.
4. An action potential arrives at the axon terminal of a motor neuron.
5. Acetylcholine binds to ligand-gated sodium ion channels in the motor end plate.
4, 3, 5, 1, 2
Aerobic respiration is the type of energy creation that will give the muscle about
two minutes of energy only.
A. True
B. False
B. False
Between skeletal muscle, cardiac muscle, and smooth muscle, the smooth muscle
has the lowest adenosine triphosphate (ATP) demands due to the latch-bridge
mechanism.
, A. True
B. False
A. True
Stimulating a muscle fiber with such high frequency that the twitches fuse into a
single, nonfluctuating contraction is known as what?
A. Temporal summation
B. Wave summation
C. Incomplete tetanus
D. Fused tetanus
D. Fused tetanus
The muscle fiber (cell) is an important part of the organization of muscle tissue in
the skeletal muscle. What is the organization of muscle tissue from smallest to
largest?
A. Filament, myofibril, fiber, fascicle, skeletal muscle
B. Fiber, myofibril, filament, skeletal muscle, fascicle
C. Myofibril, fiber, skeletal muscle, filament, fascicle
D. Skeletal muscle, fascicle, fiber, myofibril, filament
A. Filament, myofibril, fiber, fascicle, skeletal muscle
What is the functional contractile unit of the myofibril where muscle tension is
produced?
A. A band
CORRECT ANSWERS GRADED A+
Which type of muscle tissue would best be described as long, thin, cylindrical,
multinucleated, and voluntary?
A. Smooth muscle
B. Skeletal muscle
C. Non-striated muscle
D. Cardiac muscle
B. Skeletal muscle
Intercalated discs are only found in __________________.
A. smooth muscle tissue
B. cardiac muscle tissue
C. voluntary muscle tissue
D. skeletal muscle tissue
B. cardiac muscle tissue
Which muscle type is found in blood vessels?
A. Striated muscle
B. Smooth muscle
C. Skeletal muscle
D. Cardiac muscle
,B. Smooth muscle
Which of the following is a function of smooth muscle?
A. Moving food through the digestive system
B. Pumping blood in the heart
C. Voluntary contraction
D. Blinking your eye
A. Moving food through the digestive system
The neurotransmitter used at the neuromuscular junction is acetylcholine (ACh).
A. True
B. False
A. True
Skeletal muscle fiber is considered to be multinucleated.
A. True
B. False
A. True
The fixed point of a lever system that the movement is applied to is known as
the_______________.
A. action
,B. effort
C. fulcrum
D. load
C. fulcrum
Place the events of excitation in the correct order, from first to last.
1. Ion channels on the sarcolemma open and sodium ions enter the muscle fiber.
2. The entry of sodium ions into the muscle fiber depolarizes the sarcolemma
locally.
3. Acetylcholine is released from vesicles in the motor neuron into the synaptic
cleft.
4. An action potential arrives at the axon terminal of a motor neuron.
5. Acetylcholine binds to ligand-gated sodium ion channels in the motor end plate.
4, 3, 5, 1, 2
Aerobic respiration is the type of energy creation that will give the muscle about
two minutes of energy only.
A. True
B. False
B. False
Between skeletal muscle, cardiac muscle, and smooth muscle, the smooth muscle
has the lowest adenosine triphosphate (ATP) demands due to the latch-bridge
mechanism.
, A. True
B. False
A. True
Stimulating a muscle fiber with such high frequency that the twitches fuse into a
single, nonfluctuating contraction is known as what?
A. Temporal summation
B. Wave summation
C. Incomplete tetanus
D. Fused tetanus
D. Fused tetanus
The muscle fiber (cell) is an important part of the organization of muscle tissue in
the skeletal muscle. What is the organization of muscle tissue from smallest to
largest?
A. Filament, myofibril, fiber, fascicle, skeletal muscle
B. Fiber, myofibril, filament, skeletal muscle, fascicle
C. Myofibril, fiber, skeletal muscle, filament, fascicle
D. Skeletal muscle, fascicle, fiber, myofibril, filament
A. Filament, myofibril, fiber, fascicle, skeletal muscle
What is the functional contractile unit of the myofibril where muscle tension is
produced?
A. A band
