Module 1 Exam Questions and Answers
Graded A+
Skeletal system - Correct answer-Composed of 206 boned in the adult body.
Provides leverage, support, and protection.
Pulled on by muscles to allow the body to push or pull against external objects.
Axial skeleton - Correct answer-Consist of the skull, vertebra, colum (C1-coccyx),
ribs, and sternum.
Appendicular skeleton - Correct answer-Consist of shoulder girdle; bones of the
arms, wrist, hands, and pelvic girdle; and bones of the legs, ankles, and feet
Joint - Correct answer-Junctions of bones
Fibrous - Correct answer-Allow virtually no movement. Example: Sutures of the
skull
( No movement)
Cartilaginous - Correct answer-Allow limited movement. Example: Intervertebral
(Some movement)
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,Synovial - Correct answer-Allow considerable movement. Example: Elbows and
knees
(Full movement)
Uniaxial - Correct answer-Operate as a hinge, rotate about one axis. Example:
Elbow
Biaxial - Correct answer-Operate in two perpendicular axes. Example: Ankle and
wrist
Multiaxial - Correct answer-Allow movement in all three axes. Example: Shoulder
and hip
Vertebral Column - Correct answer-Vertebral bones separated by flexible disks that
allow for movement. They include:
-7 Cervical vertebrae (neck region): C1-C7
-12 Thoracic vertebrae (upper back): T1-T12
-5 Lumbar vertebare (lower back): L1-L5
-5 Sacral vertebrae (make up rear of pelvis): S1-S5
-3-5 Coccygeal vertebrae (form vestigial tail extending down from the pelvis)
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, Musculoskeletal Macrostructure and Microstructure - Correct answer--Each
skeletal muscle is an organ that contains muscle tissue, connective tissue, nerves,
and blood vessels.
-Fibrous connective tissue, or epimysium, covers more than 430 skeletal muscles.
-Pulled on by muscles to allow the body to push or pull against external objects.
Motor Unit - Correct answer-Consists of a motor neuron and the muscle fivers it
innervates.
There are typically several hundred muscle fibres in a single unit.
Myosin and actin - Correct answer--The arrangement of myosin (thick) and actin
(thin) filaments gives skeletal muscle its striated appearance.
-The discharge of an action potential from a motor nerve signals calcium release
from the sarcoplasmic reticulum into the myofibril, causing tension development in
muscle.
Sliding-Filament Theory of Muscular Contraction - Correct answer-This theory of
muscular contraction states that the actin filaments at each end of the sarcomere
slide inwards on myosin filaments, pulling the Z-lines toward the center of the
sarcomere and thus shortening the muscle fiber.
Phases of Sliding Filament Theory - Correct answer-1. Resting phase
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Graded A+
Skeletal system - Correct answer-Composed of 206 boned in the adult body.
Provides leverage, support, and protection.
Pulled on by muscles to allow the body to push or pull against external objects.
Axial skeleton - Correct answer-Consist of the skull, vertebra, colum (C1-coccyx),
ribs, and sternum.
Appendicular skeleton - Correct answer-Consist of shoulder girdle; bones of the
arms, wrist, hands, and pelvic girdle; and bones of the legs, ankles, and feet
Joint - Correct answer-Junctions of bones
Fibrous - Correct answer-Allow virtually no movement. Example: Sutures of the
skull
( No movement)
Cartilaginous - Correct answer-Allow limited movement. Example: Intervertebral
(Some movement)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,Synovial - Correct answer-Allow considerable movement. Example: Elbows and
knees
(Full movement)
Uniaxial - Correct answer-Operate as a hinge, rotate about one axis. Example:
Elbow
Biaxial - Correct answer-Operate in two perpendicular axes. Example: Ankle and
wrist
Multiaxial - Correct answer-Allow movement in all three axes. Example: Shoulder
and hip
Vertebral Column - Correct answer-Vertebral bones separated by flexible disks that
allow for movement. They include:
-7 Cervical vertebrae (neck region): C1-C7
-12 Thoracic vertebrae (upper back): T1-T12
-5 Lumbar vertebare (lower back): L1-L5
-5 Sacral vertebrae (make up rear of pelvis): S1-S5
-3-5 Coccygeal vertebrae (form vestigial tail extending down from the pelvis)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, Musculoskeletal Macrostructure and Microstructure - Correct answer--Each
skeletal muscle is an organ that contains muscle tissue, connective tissue, nerves,
and blood vessels.
-Fibrous connective tissue, or epimysium, covers more than 430 skeletal muscles.
-Pulled on by muscles to allow the body to push or pull against external objects.
Motor Unit - Correct answer-Consists of a motor neuron and the muscle fivers it
innervates.
There are typically several hundred muscle fibres in a single unit.
Myosin and actin - Correct answer--The arrangement of myosin (thick) and actin
(thin) filaments gives skeletal muscle its striated appearance.
-The discharge of an action potential from a motor nerve signals calcium release
from the sarcoplasmic reticulum into the myofibril, causing tension development in
muscle.
Sliding-Filament Theory of Muscular Contraction - Correct answer-This theory of
muscular contraction states that the actin filaments at each end of the sarcomere
slide inwards on myosin filaments, pulling the Z-lines toward the center of the
sarcomere and thus shortening the muscle fiber.
Phases of Sliding Filament Theory - Correct answer-1. Resting phase
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