BIO 112 Test 3 ECPI - Questions With Efficient
Solutions
Synarthrotic joints Right Ans - immovable
Amphiarthrotic joints Right Ans - slightly movable
Diarthrotic joints Right Ans - freely movable
Fibrous joints Right Ans - held together by dense connective tissue
• Syndesmosis (Between tibia and fibula): Amphiarthrotic
• Suture (between flat bones of skull): Synarthrotic
• Gomphosis (Root of a tooth in maxilla or mandible):Synarthrotic
Cartilaginous joints Right Ans - Held together by cartilage
• Synchondrosis (epiphyseal plate, costal cartilages): Synarthrotic
• Symphysis (in between the pelvic bones, in between intervertebral discs):
Amphiarthrotic
Synovial joints Right Ans - Have a complex structure (all are diarthrotic)
• Ball-and-Socket Joint: Multiaxial, plus rotation (hip, shoulder)
• Condylar Joint: Biaxial movement, no rotation (between metacarpals and
phalanges)
• Plane Joint: Back-and-forth and twisting; Non-axial movement (Wrist and
ankle joints)
• Hinge Joint: Uniaxial movement; (elbow)
• Pivot Joint: Uniaxial movement; Rotation only ) Atlas (C1) and dens of axis
(C2)
• Saddle Joint: Biaxial movement; Carpal and metacarpal of thumb
Meniscus Right Ans - It's a piece of cartilage in your knee that cushions and
stabilizes the joint. It protects the bones from wear and tear
Bursa Right Ans - a tiny, slippery sac of fluid that provides a cushion and
reduces friction between the surfaces of a bone and tissue.
Smooth muscle Right Ans - non-striated; involuntary
, Skeletal muscle Right Ans - striated; voluntary
Cardiac Right Ans - striated; involuntary
Fascia Right Ans - Thin covering of connective tissue around a muscle
Tendon Right Ans - Cord-like mass of connective tissue that connects
muscle to a bone
Epimysium Right Ans - surrounds whole muscle; lies beneath fascia
Perimysium Right Ans - surrounds fascicles within a muscle
Endomysium Right Ans - surrounds muscle fibers (cells) within a fascicle
Motor neuron Right Ans - gets a stimulus from the brain and directs this
signal to the muscle cell
Neuromuscular junction Right Ans - space between the muscle cell and
neuron), the neurotransmitter, ACh (acetylcholine), is released
ACh Right Ans - causes affects that lead to calcium channels opening
Calcium binds to Right Ans - troponin (the lock on actin) and releases the
troponin and tropomyosin ("bike chain on actin") to expose the actin for
myosin to attach
ATP binds to Right Ans - the myosin head which causes the myosin to cock
back and the actin slides across
Power stroke Right Ans - shortens the myofibril and causes the muscle
fibers to shorten and then the fascicles
Once the neuron impulse stops -> Right Ans - causes ACh to stop -> calcium
to stop being released -> troponin and tropomyosin to "lock up" the actin
myofilament again until the next contraction
Solutions
Synarthrotic joints Right Ans - immovable
Amphiarthrotic joints Right Ans - slightly movable
Diarthrotic joints Right Ans - freely movable
Fibrous joints Right Ans - held together by dense connective tissue
• Syndesmosis (Between tibia and fibula): Amphiarthrotic
• Suture (between flat bones of skull): Synarthrotic
• Gomphosis (Root of a tooth in maxilla or mandible):Synarthrotic
Cartilaginous joints Right Ans - Held together by cartilage
• Synchondrosis (epiphyseal plate, costal cartilages): Synarthrotic
• Symphysis (in between the pelvic bones, in between intervertebral discs):
Amphiarthrotic
Synovial joints Right Ans - Have a complex structure (all are diarthrotic)
• Ball-and-Socket Joint: Multiaxial, plus rotation (hip, shoulder)
• Condylar Joint: Biaxial movement, no rotation (between metacarpals and
phalanges)
• Plane Joint: Back-and-forth and twisting; Non-axial movement (Wrist and
ankle joints)
• Hinge Joint: Uniaxial movement; (elbow)
• Pivot Joint: Uniaxial movement; Rotation only ) Atlas (C1) and dens of axis
(C2)
• Saddle Joint: Biaxial movement; Carpal and metacarpal of thumb
Meniscus Right Ans - It's a piece of cartilage in your knee that cushions and
stabilizes the joint. It protects the bones from wear and tear
Bursa Right Ans - a tiny, slippery sac of fluid that provides a cushion and
reduces friction between the surfaces of a bone and tissue.
Smooth muscle Right Ans - non-striated; involuntary
, Skeletal muscle Right Ans - striated; voluntary
Cardiac Right Ans - striated; involuntary
Fascia Right Ans - Thin covering of connective tissue around a muscle
Tendon Right Ans - Cord-like mass of connective tissue that connects
muscle to a bone
Epimysium Right Ans - surrounds whole muscle; lies beneath fascia
Perimysium Right Ans - surrounds fascicles within a muscle
Endomysium Right Ans - surrounds muscle fibers (cells) within a fascicle
Motor neuron Right Ans - gets a stimulus from the brain and directs this
signal to the muscle cell
Neuromuscular junction Right Ans - space between the muscle cell and
neuron), the neurotransmitter, ACh (acetylcholine), is released
ACh Right Ans - causes affects that lead to calcium channels opening
Calcium binds to Right Ans - troponin (the lock on actin) and releases the
troponin and tropomyosin ("bike chain on actin") to expose the actin for
myosin to attach
ATP binds to Right Ans - the myosin head which causes the myosin to cock
back and the actin slides across
Power stroke Right Ans - shortens the myofibril and causes the muscle
fibers to shorten and then the fascicles
Once the neuron impulse stops -> Right Ans - causes ACh to stop -> calcium
to stop being released -> troponin and tropomyosin to "lock up" the actin
myofilament again until the next contraction
