BIOD 151 module 5 exam Latest Update 2025-
2026 Actual Exam Questions with 100% Verified
Correct Answers Guaranteed A+ Verified by
Professor
A person sustained a back injury to the muscle group closest to the spine. What muscle
group was injured?
A. Longissimus
B. Spinalis
C. Sternocleidomastoid
D. Iliocostalis
E. Rectus abdominis - CORRECT ANSWER: B
Acetylcholine is what type of substance? - CORRECT ANSWER: Neurotransmitter
chart 2 - CORRECT ANSWER: chart 2 answers
Contraction of _______ results in _______?
A. obturator externus, spine flexion
B. obturator externus, spine extension
C. iliacus, hip flexion
D. iliacus, hip extension - CORRECT ANSWER: C
Describe how acetylcholine, sodium ions and calcium ions work together to enable a
muscle contraction. - CORRECT ANSWER: Acetylcholine (a special chemical called a
neurotransmitter) is released from a motor nerve at the neuromuscular junction (or
NMJ). Acetylcholine binds to receptors on the muscle fiber that cause sodium channels
, to open. Sodium ions rush inside the cell, triggering an action potential which eventually
reaches the sarcoplasmic reticulum. Calcium ions are released from the sarcoplasmic
reticulum of the muscle cell, causing a muscle contraction to occur.
Describe what is meant by muscle fiber "cross-bridges". What occurs to enable
movement of the cross-bridges? - CORRECT ANSWER: In the presence of calcium
ions, portions of a myosin filament called cross-bridges bend backward and attach to an
actin filament. After attaching to the actin filament, the crossbridges bend forward, and
the actin filament is pulled along. The cross-bridges attach and detach some fifty to 100
times as the thin filaments are pulled to the center of a sarcomere. ATP is needed on a
cellular level for the myosin to pull actin along.
During a muscle contraction which protein myofilament is pulled along? - CORRECT
ANSWER: Actin
KNOW DIAGRAM - CORRECT ANSWER: picture 1
Know picture 4 - CORRECT ANSWER: know picture 4
know picture 5 - CORRECT ANSWER: know labels
Ligaments connect which types of tissue? - CORRECT ANSWER: Connect bone to
bone
Picture 3 Diagram Questions:
1. Which muscle has origins on both the clavicle and scapula? (specify letter on
diagram with the name of the muscle for full credit) 2. Which muscle is innervated by the
thoracodorsal nerve? (specify letter on diagram with the name of the muscle for full
credit)
3. What is the name of muscle D?
2026 Actual Exam Questions with 100% Verified
Correct Answers Guaranteed A+ Verified by
Professor
A person sustained a back injury to the muscle group closest to the spine. What muscle
group was injured?
A. Longissimus
B. Spinalis
C. Sternocleidomastoid
D. Iliocostalis
E. Rectus abdominis - CORRECT ANSWER: B
Acetylcholine is what type of substance? - CORRECT ANSWER: Neurotransmitter
chart 2 - CORRECT ANSWER: chart 2 answers
Contraction of _______ results in _______?
A. obturator externus, spine flexion
B. obturator externus, spine extension
C. iliacus, hip flexion
D. iliacus, hip extension - CORRECT ANSWER: C
Describe how acetylcholine, sodium ions and calcium ions work together to enable a
muscle contraction. - CORRECT ANSWER: Acetylcholine (a special chemical called a
neurotransmitter) is released from a motor nerve at the neuromuscular junction (or
NMJ). Acetylcholine binds to receptors on the muscle fiber that cause sodium channels
, to open. Sodium ions rush inside the cell, triggering an action potential which eventually
reaches the sarcoplasmic reticulum. Calcium ions are released from the sarcoplasmic
reticulum of the muscle cell, causing a muscle contraction to occur.
Describe what is meant by muscle fiber "cross-bridges". What occurs to enable
movement of the cross-bridges? - CORRECT ANSWER: In the presence of calcium
ions, portions of a myosin filament called cross-bridges bend backward and attach to an
actin filament. After attaching to the actin filament, the crossbridges bend forward, and
the actin filament is pulled along. The cross-bridges attach and detach some fifty to 100
times as the thin filaments are pulled to the center of a sarcomere. ATP is needed on a
cellular level for the myosin to pull actin along.
During a muscle contraction which protein myofilament is pulled along? - CORRECT
ANSWER: Actin
KNOW DIAGRAM - CORRECT ANSWER: picture 1
Know picture 4 - CORRECT ANSWER: know picture 4
know picture 5 - CORRECT ANSWER: know labels
Ligaments connect which types of tissue? - CORRECT ANSWER: Connect bone to
bone
Picture 3 Diagram Questions:
1. Which muscle has origins on both the clavicle and scapula? (specify letter on
diagram with the name of the muscle for full credit) 2. Which muscle is innervated by the
thoracodorsal nerve? (specify letter on diagram with the name of the muscle for full
credit)
3. What is the name of muscle D?
