STRAIGHTERLINE ANATOMY EXAM
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ Given these events:
1. acetylcholine broken down into acetic acid and choline
2. acetylcholine moves across the synaptic cleft
3. action potential reaches the terminal branch of the motor neuron
4. acetylcholine combines with a receptor molecule
5. action potential is produced on the muscle fiber's plasma
membrane
Choose the arrangement that lists the events in the order they occur
at a neuromuscular junction.
A) 2,3,4,1,5
B) 3,2,4,5,1
C) 3,4,2,1,5
D) 4,5,2,1,3
E) 5,1,2,4,3 Answer: B) 3,2,4,5,1
,◉ Acetylcholinesterase is an important molecule in the
neuromuscular junction because it
A) stimulates receptors on the presynaptic terminal.
B) synthesizes acetylcholine from acetic acid and choline.
C) stimulates receptors within the postsynaptic membrane.
D) breaks down acetylcholine.
E) causes the release of Ca2+ from the sarcoplasmic reticulum.
Answer: D) breaks down acetylcholine.
◉ Given these events:
1. sarcoplasmic reticulum releases Ca2+
2. sarcoplasmic reticulum takes up Ca2+
3. Ca2+ diffuse into myofibrils
4. action potential moves down the T tubule
5. sarcomere shortens
6. muscle relaxes
Choose the arrangement that lists the events in the order they occur
following a single stimulation of a skeletal muscle cell.
A) 1,3,4,5,2,6
B) 2,3,5,4,6,1
C) 4,1,3,5,2,6
,D) 4,2,3,5,1,6
E) 5,1,4,3,2,6
F) 4,1,3,5,2,6 Answer: C) 4,1,3,5,2,6
◉ Given these events:
1. Ca2+ combine with tropomyosin
2. Ca2+ combine with troponin
3. tropomyosin pulls away from actin
4. troponin pulls away from actin
5. tropomyosin pulls away from myosin
6. troponin pulls away from myosin
7. myosin binds to actin
Choose the arrangement that lists the events in the order they occur
during muscle contraction.
A) 1,4,7
B) 2,5,6
C) 1,3,7
D) 2,4,7
E) 2,3,7 Answer: E) 2,3,7
◉ Which of these regions shortens during skeletal muscle
contraction?
, A) A band
B) I band
C) H zone
D) both a and b
E) both b and c Answer: E) both b and c
◉ With stimuli of increasing strength, which of these is capable of a
graded response?
A) nerve axon
B) muscle fiber
C) motor unit
D) whole muscle Answer: D) whole muscle
◉ Considering the force of contraction of a skeletal muscle cell,
multiple-wave summation occurs because of
A) increased strength of action potentials on the plasma membrane.
B) a decreased number of cross-bridges formed.
C) an increase in Ca2+ concentration around the myofibrils.
D) an increased number of motor units recruited.
E) increased permeability of the sarcolemma to Ca2+. Answer: C) an
increase in Ca2+ concentration around the myofibrils.
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ Given these events:
1. acetylcholine broken down into acetic acid and choline
2. acetylcholine moves across the synaptic cleft
3. action potential reaches the terminal branch of the motor neuron
4. acetylcholine combines with a receptor molecule
5. action potential is produced on the muscle fiber's plasma
membrane
Choose the arrangement that lists the events in the order they occur
at a neuromuscular junction.
A) 2,3,4,1,5
B) 3,2,4,5,1
C) 3,4,2,1,5
D) 4,5,2,1,3
E) 5,1,2,4,3 Answer: B) 3,2,4,5,1
,◉ Acetylcholinesterase is an important molecule in the
neuromuscular junction because it
A) stimulates receptors on the presynaptic terminal.
B) synthesizes acetylcholine from acetic acid and choline.
C) stimulates receptors within the postsynaptic membrane.
D) breaks down acetylcholine.
E) causes the release of Ca2+ from the sarcoplasmic reticulum.
Answer: D) breaks down acetylcholine.
◉ Given these events:
1. sarcoplasmic reticulum releases Ca2+
2. sarcoplasmic reticulum takes up Ca2+
3. Ca2+ diffuse into myofibrils
4. action potential moves down the T tubule
5. sarcomere shortens
6. muscle relaxes
Choose the arrangement that lists the events in the order they occur
following a single stimulation of a skeletal muscle cell.
A) 1,3,4,5,2,6
B) 2,3,5,4,6,1
C) 4,1,3,5,2,6
,D) 4,2,3,5,1,6
E) 5,1,4,3,2,6
F) 4,1,3,5,2,6 Answer: C) 4,1,3,5,2,6
◉ Given these events:
1. Ca2+ combine with tropomyosin
2. Ca2+ combine with troponin
3. tropomyosin pulls away from actin
4. troponin pulls away from actin
5. tropomyosin pulls away from myosin
6. troponin pulls away from myosin
7. myosin binds to actin
Choose the arrangement that lists the events in the order they occur
during muscle contraction.
A) 1,4,7
B) 2,5,6
C) 1,3,7
D) 2,4,7
E) 2,3,7 Answer: E) 2,3,7
◉ Which of these regions shortens during skeletal muscle
contraction?
, A) A band
B) I band
C) H zone
D) both a and b
E) both b and c Answer: E) both b and c
◉ With stimuli of increasing strength, which of these is capable of a
graded response?
A) nerve axon
B) muscle fiber
C) motor unit
D) whole muscle Answer: D) whole muscle
◉ Considering the force of contraction of a skeletal muscle cell,
multiple-wave summation occurs because of
A) increased strength of action potentials on the plasma membrane.
B) a decreased number of cross-bridges formed.
C) an increase in Ca2+ concentration around the myofibrils.
D) an increased number of motor units recruited.
E) increased permeability of the sarcolemma to Ca2+. Answer: C) an
increase in Ca2+ concentration around the myofibrils.
