CH 4&5 Review
Hypoxia refers to the
the disruption of oxygen supply
The beginning of the acute inflammatory phase of healing involves processes which
Act to stop blood loss from the wound
The inflammatory phase of healing lasts 72 hours.
TRUE
The repair phase begins when the hematoma's size decreases enough to permit room for growth of new tissue
TRUE
The proliferative phase of healing includes which of the following processes?
angiogenisis, fibrous tissue formation, and wound contraction
During the acute inflammatory phase, heparin is released into the injured area, acting as an anticoagulant that results in increased swelling
FALSE
Hypoxia is defined as having a reduced concentration of oxygen.
TRUE
Mast cells are connective tissue cells that carry
heparin, histamine, and bradykinin
Vasodilatation is a narrowing of the blood vessels.
FALSE
A blister is an accumulation of fluid between the epidermis and the dermis.
TRUE
By their nature or cause, many secondary injuries could have been prevented.
TRUE
Movements of flexion and extension occur in the sagittal plane.
TRUE
The distribution of force over a given area is called
stress
Phagocytosis refers to
the ingestion of cellular debris and waste products
The tensile strength of a wound 3-4 weeks post-injury is approximately ___ % of normal.
25
Ecchymosis is a fluid with high protein content and cellular debris that forms in the area of injury.
FALSE
Tendons are equal in strength to their attached muscle.
FALSE
Which of the following is correct?
The wrist is distal to the elbow.
What two potential effects occur when a force acts on an object?
acceleration and deformation
When a structure is stronger in resisting force from certain directions than from others, it is said to be
anisotropic
Which of the following terms refers to a structure on both sides of the body or body part?
bilateral
Which of the following is a correctly matched pair of terms?
flexion - decreasing the angle of a joint
A contusion is an accumulation of blood between the layers of skin.
FALSE
Extensibility is the ability of a muscle to be stretched and to return to normal length after either lengthening or shortening.
FALSE
If tissues undergo abnormally high tensile stress before scar formation is complete, the newly forming tissue can be elongated and much stronger than the original tissue.
FALSE
The strength of scar tissue following injury is based primarily on the amount of collagen that has been laid down rather than the arrangement in which the collagen is laid down.
FALSE
Collagen is a non-elastic substance, but the arrangement of collagen fibers allows for a certain amount of elastic-type deformation.
TRUE
Neutrophils and macrophages are immature connective tissue cells released into the injured area by the exudate
TRUE
Tendons resist high, unidirectional tension loads from the attached muscle.
TRUE
The causative factor of an acute injury is a single force.
TRUE
The frontal plane divides the body into anterior and posterior halves.
TRUE
When a nerve is completely severed, healing does not occur and loss of function is typically permanent.
TRUE
Cells that are capable of generating collagen during the proliferative phase of healing are termed
fibroblasts
Which of the following are characteristics of scar tissue?
fibrous, inelastic, and nonvascular
Rubor, calor, tumor, dolor, and loss of function are all symptoms of
inflammation
What two factors determine whether an injury occurs when a force is sustained by tissues in the human body?
magnitude of forces and tissue's material properties
A force that acts parallel or tangent to a plane passing through the object is called a:
shear force
A pulling force that tends to stretch the object to which it is applied is called a(n)
tensile force
While stretching for an overthrown ball a first baseman strained an adductor muscle. What type of force would have produced this injury?
tensile force
The tissues affected by inflammation, edema, and hypoxia comprises:
the zone of secondary injury