true or false Flashcards
Blood consists of cells and a ground substance made of formed elements.
false
Columnar cells lining the small intestine have a brush border of microvilli on the apical surface.
true
Dendrites in a neuron send outgoing signals to other cells.
false
Desmosomes are more effective than tight junctions in preventing substances from passing between cells.
false
Excitable cells respond to outside stimuli by means of changes in plasma membrane shape.
false
Fibrocartilage is found in intervertebral discs.
true
Nonkeratinized cells exfoliate from the surface of the skin.
false
Plasma cells produce the ground substance that forms the matrix of connective tissues.
false
Scar tissue helps to hold an organ together but does not restore normal function of the damaged tissue.
true
Smooth and cardiac muscles are under involuntary control.
true
The clear gel that usually surrounds cells is called interstitial fluid.
true
The duct of an endocrine gland leads into the bloodstream rather than onto an epithelial surface.
false
The secretory product of a gland is produced by its parenchyma, not its stroma.
true
Albinism is the genetic lack of melanin that results in a milky white coloration of the skin.
true
Debridement is not necessary to infection control.
false
Embarrassment can be perceived by an abnormal coloration of the skin called cyanosis.
false
Freckles are elevated patches with an abnormal coloration of the skin.
false
Hair and nails are composed of collagen.
false
Melanin, hemoglobin, and carotene give color to the skin.
true
Merocrine sweat glands are associated with hair follicles in the pubic and anal regions, axilla, areola, and beard.
false
Pattern baldness is relatively rare in women because women have lower testosterone levels than men.
true
Straight hair is round, wavy hair is oval, and curly hair is relatively flat.
true
The deeper of the two layers of the skin is the hypodermis.
false
The three forms of skin cancer are defined by the types of cells from which they originate.
true
The youngest keratinocytes are found in the stratum basale.
true
A vertebra is considered an irregular bone.
true
Closed reduction is the surgical realignment of the parts of a broken bone.
false
Hypercalcemia is rare, but hypocalcemia can result from a wide variety of conditions.
true
Most blood cells are produced in the red marrow of bones.
true
Osteomalacia results in bone brittleness.
false
Osteoporosis often leads to an exaggerated thoracic spinal curvature, which is called kyphosis.
true
A dark band formed by parallel thick filaments that partly overlap the thin filaments is known as an H band.
false
A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis
true
An isometric contraction does not change muscle length.
true
Clinically, dystrophin is the most important noncontractile protein to occur in muscle fibers.
true
Extensibility refers to the ability of a muscle to stretch
true
Some smooth muscle is autorhythmic.
true
The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.
true
The sliding filament theory of muscle contraction has emerged from research only in the last 10 to 15 years.
false
