Bio 161 Exam 4 Review Questions and Answers
with Complete Solutions 100% Correct | New
Update 2025
muscle fiber - ANSWERS an individual muscle cell
fasicle - ANSWERS a group of muscle cells within the belly of a muscle
sarcolemma - ANSWERS plasma membrane of skeletal muscle cells
sarcoplasm - ANSWERS the cytoplasm of a skeletal muscle cell
sarcomere - ANSWERS Contractile unit of a muscle cell that make a myofibirl
sarcoplasmic reticulum - ANSWERS Modified endoplasmic reticulum that
regulates calcium in the cell
T (transverse) tubules - ANSWERS Tubes continuous with the sarcolemma to
increase surface area
myofibril - ANSWERS The major component of a muscle cell (takes up the
most intracellular volume)
, myoglobin - ANSWERS Oxygen-binding protein in a muscle cell
multi nucleate - ANSWERS Containing many nuclei
epimysium - ANSWERS Fibrous connective tissue that is continuous with the
tendon
Which type of muscle cell(s) is (are) striated? Choose all that apply. - ANSWERS
skeletal, cardiac
Skeletal muscle tends to contain short, branched cells. T or F? - ANSWERS
False, Skeletal muscle cells tend to be very long and cylindrical.
The neuromuscular junction (or synapse) involves with of the following two cell
types? - ANSWERS neuron:skeletal muscle
Which of the following neurotransmitters are released at the neuromuscular
junction? - ANSWERS acetylcholine
What type of channels bind to acetylcholine in the post-synaptic (muscle cell)
membrane? - ANSWERS chemical (ligand)-gated, (Acetylcholine is a chemical
and it provides the "key" to open channels in the muscle cell membrane.)
Receptors for acetylcholine are located in the motor end plate of the muscle cell.
T or F? - ANSWERS True, By definition, the motor end plate is the part of the
muscle cell membrane that forms a synapse with the somatic motor neuron.
with Complete Solutions 100% Correct | New
Update 2025
muscle fiber - ANSWERS an individual muscle cell
fasicle - ANSWERS a group of muscle cells within the belly of a muscle
sarcolemma - ANSWERS plasma membrane of skeletal muscle cells
sarcoplasm - ANSWERS the cytoplasm of a skeletal muscle cell
sarcomere - ANSWERS Contractile unit of a muscle cell that make a myofibirl
sarcoplasmic reticulum - ANSWERS Modified endoplasmic reticulum that
regulates calcium in the cell
T (transverse) tubules - ANSWERS Tubes continuous with the sarcolemma to
increase surface area
myofibril - ANSWERS The major component of a muscle cell (takes up the
most intracellular volume)
, myoglobin - ANSWERS Oxygen-binding protein in a muscle cell
multi nucleate - ANSWERS Containing many nuclei
epimysium - ANSWERS Fibrous connective tissue that is continuous with the
tendon
Which type of muscle cell(s) is (are) striated? Choose all that apply. - ANSWERS
skeletal, cardiac
Skeletal muscle tends to contain short, branched cells. T or F? - ANSWERS
False, Skeletal muscle cells tend to be very long and cylindrical.
The neuromuscular junction (or synapse) involves with of the following two cell
types? - ANSWERS neuron:skeletal muscle
Which of the following neurotransmitters are released at the neuromuscular
junction? - ANSWERS acetylcholine
What type of channels bind to acetylcholine in the post-synaptic (muscle cell)
membrane? - ANSWERS chemical (ligand)-gated, (Acetylcholine is a chemical
and it provides the "key" to open channels in the muscle cell membrane.)
Receptors for acetylcholine are located in the motor end plate of the muscle cell.
T or F? - ANSWERS True, By definition, the motor end plate is the part of the
muscle cell membrane that forms a synapse with the somatic motor neuron.
