ECPI BIO 111 Ch:9 Exam Questions With 100%
Verified Correct Answers.
Types of Muscle Tissue:
Skeletal, Cardiac, Smooth
Skeletal Muscle
Muscle attaced to bones of skeleton; most abundant muscle; voluntary (consciously
controlled); striated; multinucleated; only contracts when the nervous system tells it to
Cardiac Muscle
The rarest muscle; makes up most of the wall of the heart; allows for pumping of heart;
involuntary (non-consciously controlled); striated; singly nucleated; can contract independent
of the nervous system
Smooth Muscle
Second most abundant muscle; found in walls of internal organs (e.g. stomach, intestines,
gallbladder); involuntary (non-consciously controlled); non-striated, singly nucleated
Approximate amount of Skeletal Muscles in the body:
600-650
Skeletal Muscles are composed of:
Skeletal muscle tissue, Nervous tissue, Blood, Connective tissues
Fascia
Thin covering of connective tissue surrounding a whole muscle
Tendon
Cord-like mass of connective tissue that connects a muscle to bone
Aponeurosis
, Sheet-like mass of connective tissue that connects a muscle to bone, skin, or another muscle
Epimysium
Surrounds whole muscle; lies beneath Fascia
Perimysium
Surrounds fascicles within muscle
Endomysium
Surrounds muscle fibers (cells) within a fascicle
Sarcolemma
Cell membrane of muscle fiber
Sarcoplasm
Cytoplasm of muscle fiber
Myofibrils
Cylinder-shaped bundle of actin and myosin; longg parallel structures that run down fiber;
consist of thin actin filaments and thick myosin filaments; made up of sacomeres
Sarcomeres
Units that connect end-to-end from one z-line/disc to the next z-line/disc, to make up
myofibrils
Sarcoplasmic Reticulum (SR)
Endoplasmic Reticulum of muscle; stores calcium and releases it when needed to permit muscle
contraction
Transverse (T) Tubule
Relays electrical impulses to the SR
Verified Correct Answers.
Types of Muscle Tissue:
Skeletal, Cardiac, Smooth
Skeletal Muscle
Muscle attaced to bones of skeleton; most abundant muscle; voluntary (consciously
controlled); striated; multinucleated; only contracts when the nervous system tells it to
Cardiac Muscle
The rarest muscle; makes up most of the wall of the heart; allows for pumping of heart;
involuntary (non-consciously controlled); striated; singly nucleated; can contract independent
of the nervous system
Smooth Muscle
Second most abundant muscle; found in walls of internal organs (e.g. stomach, intestines,
gallbladder); involuntary (non-consciously controlled); non-striated, singly nucleated
Approximate amount of Skeletal Muscles in the body:
600-650
Skeletal Muscles are composed of:
Skeletal muscle tissue, Nervous tissue, Blood, Connective tissues
Fascia
Thin covering of connective tissue surrounding a whole muscle
Tendon
Cord-like mass of connective tissue that connects a muscle to bone
Aponeurosis
, Sheet-like mass of connective tissue that connects a muscle to bone, skin, or another muscle
Epimysium
Surrounds whole muscle; lies beneath Fascia
Perimysium
Surrounds fascicles within muscle
Endomysium
Surrounds muscle fibers (cells) within a fascicle
Sarcolemma
Cell membrane of muscle fiber
Sarcoplasm
Cytoplasm of muscle fiber
Myofibrils
Cylinder-shaped bundle of actin and myosin; longg parallel structures that run down fiber;
consist of thin actin filaments and thick myosin filaments; made up of sacomeres
Sarcomeres
Units that connect end-to-end from one z-line/disc to the next z-line/disc, to make up
myofibrils
Sarcoplasmic Reticulum (SR)
Endoplasmic Reticulum of muscle; stores calcium and releases it when needed to permit muscle
contraction
Transverse (T) Tubule
Relays electrical impulses to the SR
