©Jason MacConnell 2025 ALL RIGHTS RESERVED.
Anat 201 Exam 2 Questions With Correct
Answers A+
Functions of the muscular system are - Answer✔1.) Produce movement
2.)Maintain posture and body position
3.) Support soft tissues
4.) Guard entrances and exits
5.) Maintain body temperature
6.) Glycemic control
The three types of muscles are - Answer✔skeletal, cardiac, smooth
Sarcolemma - Answer✔specialized plasma membrane
Myofibrils - Answer✔long organelles inside muscle cell
sacroplasmic reticulum - Answer✔specialized smooth endoplasmic reticulum
stores and releases calcium
surround the myofibril
Characteristics of skeletal muscle - Answer✔Striated and voluntary
Characteristics of cardiac muscle - Answer✔striated and involuntary
autorhythmic
Characteristics of Smooth muscle - Answer✔non-striated and involuntary
small fusiform cell with one nucleus
Properties of muscle - Answer✔excitability, conductivity, contractility, extensibility, elasticity
Excitability - Answer✔ability to receive and respond to a stimulus
Conductivity - Answer✔passage of the electrical signal initiates events that lead to contraction
1
, ©Jason MacConnell 2025 ALL RIGHTS RESERVED.
Contractility - Answer✔ability to shorten when an adequate stimulus is received
Extensibility - Answer✔ability to be stretched
Elasticity - Answer✔ability to recoil and resume resting length after stretching
Epimysium - Answer✔covers the entire muscle
Perimysium - Answer✔divides the muscle into fascicles
blood vessels and nerves are contained in the perimysium
Endomysium - Answer✔covers each muscle fiber and ties fibers together
fascia - Answer✔sheet that separates neighboring muscles and groups from each other
Aponeurosis - Answer✔thin, flat sheet of connective tissue
a broad sheet of collagen fibers that connect muscles to each other
fascicle orientation - Answer✔Fusiform
Parallel
Circular
example of fusiform muscle - Answer✔biceps brachii
example of parallel muscle - Answer✔rectus abdominis
example of circular muscle - Answer✔orbicularis oris
Prime Mover (agonist) - Answer✔produces the most force during a particular action
ex. the brachialis the prime mover during flexion of elbow
Synergistic - Answer✔Same action (aids in the prime mover)
Antagonistic - Answer✔opposes action of prime mover/synergistic group
ex.) triceps brachii opposes movement of biceps brachii
Fixator - Answer✔prevents a bone from moving
neuromuscular junction - Answer✔where a motor neuron communicates with a skeletal muscle
fiber
axon terminal - Answer✔an enlarged end that contains vessicles of the neurotransmitter
Acetylcholine (ACh) - Answer✔the neurotransmitter that will cross the synaptic cleft
binds to the receptor on the motor end plate
2
Anat 201 Exam 2 Questions With Correct
Answers A+
Functions of the muscular system are - Answer✔1.) Produce movement
2.)Maintain posture and body position
3.) Support soft tissues
4.) Guard entrances and exits
5.) Maintain body temperature
6.) Glycemic control
The three types of muscles are - Answer✔skeletal, cardiac, smooth
Sarcolemma - Answer✔specialized plasma membrane
Myofibrils - Answer✔long organelles inside muscle cell
sacroplasmic reticulum - Answer✔specialized smooth endoplasmic reticulum
stores and releases calcium
surround the myofibril
Characteristics of skeletal muscle - Answer✔Striated and voluntary
Characteristics of cardiac muscle - Answer✔striated and involuntary
autorhythmic
Characteristics of Smooth muscle - Answer✔non-striated and involuntary
small fusiform cell with one nucleus
Properties of muscle - Answer✔excitability, conductivity, contractility, extensibility, elasticity
Excitability - Answer✔ability to receive and respond to a stimulus
Conductivity - Answer✔passage of the electrical signal initiates events that lead to contraction
1
, ©Jason MacConnell 2025 ALL RIGHTS RESERVED.
Contractility - Answer✔ability to shorten when an adequate stimulus is received
Extensibility - Answer✔ability to be stretched
Elasticity - Answer✔ability to recoil and resume resting length after stretching
Epimysium - Answer✔covers the entire muscle
Perimysium - Answer✔divides the muscle into fascicles
blood vessels and nerves are contained in the perimysium
Endomysium - Answer✔covers each muscle fiber and ties fibers together
fascia - Answer✔sheet that separates neighboring muscles and groups from each other
Aponeurosis - Answer✔thin, flat sheet of connective tissue
a broad sheet of collagen fibers that connect muscles to each other
fascicle orientation - Answer✔Fusiform
Parallel
Circular
example of fusiform muscle - Answer✔biceps brachii
example of parallel muscle - Answer✔rectus abdominis
example of circular muscle - Answer✔orbicularis oris
Prime Mover (agonist) - Answer✔produces the most force during a particular action
ex. the brachialis the prime mover during flexion of elbow
Synergistic - Answer✔Same action (aids in the prime mover)
Antagonistic - Answer✔opposes action of prime mover/synergistic group
ex.) triceps brachii opposes movement of biceps brachii
Fixator - Answer✔prevents a bone from moving
neuromuscular junction - Answer✔where a motor neuron communicates with a skeletal muscle
fiber
axon terminal - Answer✔an enlarged end that contains vessicles of the neurotransmitter
Acetylcholine (ACh) - Answer✔the neurotransmitter that will cross the synaptic cleft
binds to the receptor on the motor end plate
2
