Lab Test 1 Flashcards
5 main types of mature connective tissue and be able to give examples of where each can be found in the human body
Loose connective(adipose) Dense connective(tendons and ligaments0 Cartilage Bone Liquid connective tissue(blood)
What are the three main components that comprise connective tissue?
Cells, fibers, extracellular matrix
Know the main functions of connective tissue
Storage of energy
Protection of organs
Provide structural framework for the body
Connects body tissues
Cells spread through extracellular fluid
Resists and dampens compression
Articulated surfaces flat or slightly curved found in intercarpal, intertarsal, sternocostal(between sternum and second to seventh pairs of ribs)
Plane joint
Convex surface fits into concave surface(knee, elbow, ankle)
Hinge
Rounded or pointed surface fits into ring formed partly by bone and partly by ligament(atlanto-axial and radioulnar joints
Pivot
Oval shaped projection fits into oval shaped depression(radiocarpal and metacarpophalangeal joints)
Condyloid
Articular suurface of one bone is saddle-shaped: articular surface of other bone “sits” in saddle(carpometacarpal joint between trapezium and metacarpal of thumb)
Saddle
Ball-like surface fits into cuplike depression(shoulder and hip joints)
Ball-and-socket
Movement that straightens or opens a joint. Most joints are this in anatomical position.
Extension
Movement that bends a joint or brings the bones closer together. Most joints are this way in fetal position.
Flexion
Joint brings a limb medially toward the body’s midline
Adduction
Moves a limb laterally away from the midline
Abduction
Limb turns in toward the midline
Medial rotation
Limb swings away from the midline
Medial rotation
Possible only at the shoulder and hip joints; involves a combination of flexion, extension, adduction and abduction together these actions create a cone shaped movement.
Circumduction
Occurs only at axial skeleton, for example, when the head or vertebral column bends laterally to the side.
Lateral flexion
Occurs when radius and ulna lie parallel to one another
Supination
Takes place when the radius crosses over the ulna
Pronation
Happens only at the carpometacarpal joint of the thumb; oovurs when the thumbpad crosses the palm toward the last(pinkie) finger
Opposition
Elevates the foot’s medial side and brings the sole of the foot medially.
Inversion
Elevates the foot’s lateral side and moves the sole laterally
Eversion
Performed by moving the ankle to point your foot into the earth or stepping on a car’s gas pedal
Plantar flexion
Moving the ankle off the gas pedal
Dorsiflexion
Movement superiorly
Elevation
Movement inferiorly
Depression
Binds all the fascicles together to form the muscle belly
Epimysium
Wrapping of loose connective tissue surrounding each muscle fiber
Endomysium
Dense connective tissue surrounding each fascicle
Perimysium
The cytoplasm of a muscle fiber
Sarcoplasm
Invaginations of the sarcolemma; allow action potentials to enter cell
T-Tubes
The plasma membrane of a muscle fiber
Sarcolemma
The contractile element of muscle fiber; extend full length of muscle fiber
Myofibril