BIOL 2457 - Joints Exam Questions and Answers Fully Solved

BIOL 2457 - Joints Exam Questions and Answers Fully Solved What are joints also known as? - Answers Articulations What are the 3 major functions of joints? - Answers 1) Binds bones together 2) Allow bone growth 3) Enables the body to move in response to skeletal muscle contraction Joint can be identified as either structural or functional. How are joints STRUCTURALLY classified? - Answers By how adjacent bones are joined Joints can be identified as either structural or functional. How are joints FUNCTIONALLY classified? - Answers By the degree of movement that they allow What are the 3 STRUCTURAL classifications of joints? - Answers 1) Fibrous 2) Cartilaginous 3) Synovial What is a fibrous joint? - Answers A joint that is made of dense connective tissue - Made for ANCHORING What is a cartilaginous joint? - Answers A joint that is made of cartilage What is a synovial joint? - Answers A joint that is made of a fluid-filled membranous capsule What are the 3 FUNCTIONAL classifications of joints? - Answers 1) Synarthroses 2) Amphiarthroses 3) Diarthroses What is a synarthroses joint? - Answers A joint that allows NO movement (immovable) What is an amphiarthroses joint? - Answers A joint that allows SLIGHT movement (slightly movable) What is a diarthroses joint? - Answers A joint that allows FREE movement (freely movable) Fibrous joints can only be either synarthrotic or amphiarthrotic. Why? - Answers The collagen fibers inside of the dense connective tissue (what fibrous joints are made of) span between adjacent bones. This allow LITTLE to NO MOVEMENT What are the 3 types of fibrous joints? Determine whether they're synarthrotic or amphiarthrotic. - Answers 1) Sutures (immovable/synarthrotic) 2) Gomphoses (immovable/synarthrotic) 3) Syndesmose (slightly movable/amphiarthrotic) Sutures are a type of fibrous joints. Where are sutures found? - Answers Found in the skull; they bind skull bones together (immovable) Types: - Serrate: interlocking articulations; ex: sagittal suture - Lap: bone overlaps bone; ex: squamous suture - Plane: edges of articulating bones are smooth; ex: maxillary suture Gomphoses is a type of fibrous joints. Where are gomphoses found? - Answers ONLY found attaching teeth to its sockets (immovable) - Teeth held in place by fibrous periodontal ligaments Syndesmose are a type of fibrous joints. Where are syndesmose found? - Answers Found in the membrane between the tibia and fibula (slightly movable) - Bones bound by interosseus membrane Cartilaginous joints can only be either synarthrotic or amphiarthrotic (like fibrous joints). Why? - Answers Just like collagen fibers in fibrous joints, cartilage spans between adjacent bones, causing LITTLE to NO MOVEMENT What are the 2 types of cartilaginous joints? Determine whether they're synarthrotic or amphiarthrotic. - Answers 1) Synchondrose (immovable/synarthrotic_ 2) Symphyses (slightly movable/amphiarthrotic) Synchondrose is a type of cartilaginous joints. Where are synchondrose found? - Answers Found in hyaline cartilage (immovable) - Ex: Epiphyseal plate, costal cartilages on ribs, end of long bones (tibia) Symphyses is a type of cartilaginous joints. Where are symphyses found? - Answers Found in fibrocartilage and some hyaline cartilage (slightly movable) - Ex: Intervertebral joints and pubic symphysis