true or false

Question 1

Blood consists of cells and a ground substance made of formed elements.

Answer 1

false

Question 2

Columnar cells lining the small intestine have a brush border of microvilli on the apical surface.

Answer 2

true

Question 3

Dendrites in a neuron send outgoing signals to other cells.

Answer 3

false

Question 4

Desmosomes are more effective than tight junctions in preventing substances from passing between cells.

Answer 4

false

Question 5

Excitable cells respond to outside stimuli by means of changes in plasma membrane shape.

Answer 5

false

Question 6

Fibrocartilage is found in intervertebral discs.

Answer 6

true

Question 7

Nonkeratinized cells exfoliate from the surface of the skin.

Answer 7

false

Question 8

Plasma cells produce the ground substance that forms the matrix of connective tissues.

Answer 8

false

Question 9

Scar tissue helps to hold an organ together but does not restore normal function of the damaged tissue.

Answer 9

true

Question 10

Smooth and cardiac muscles are under involuntary control.

Answer 10

true

Question 11

The clear gel that usually surrounds cells is called interstitial fluid.

Answer 11

true

Question 12

The duct of an endocrine gland leads into the bloodstream rather than onto an epithelial surface.

Answer 12

false

Question 13

The secretory product of a gland is produced by its parenchyma, not its stroma.

Answer 13

true

Question 14

Albinism is the genetic lack of melanin that results in a milky white coloration of the skin.

Answer 14

true

Question 15

Debridement is not necessary to infection control.

Answer 15

false

Question 16

Embarrassment can be perceived by an abnormal coloration of the skin called cyanosis.

Answer 16

false

Question 17

Freckles are elevated patches with an abnormal coloration of the skin.

Answer 17

false

Question 18

Hair and nails are composed of collagen.

Answer 18

false

Question 19

Melanin, hemoglobin, and carotene give color to the skin.

Answer 19

true

Question 20

Merocrine sweat glands are associated with hair follicles in the pubic and anal regions, axilla, areola, and beard.

Answer 20

false

Question 21

Pattern baldness is relatively rare in women because women have lower testosterone levels than men.

Answer 21

true

Question 22

Straight hair is round, wavy hair is oval, and curly hair is relatively flat.

Answer 22

true

Question 23

The deeper of the two layers of the skin is the hypodermis.

Answer 23

false

Question 24

The three forms of skin cancer are defined by the types of cells from which they originate.

Answer 24

true

Question 25

The youngest keratinocytes are found in the stratum basale.

Answer 25

true

Question 26

A vertebra is considered an irregular bone.

Answer 26

true

Question 27

Closed reduction is the surgical realignment of the parts of a broken bone.

Answer 27

false

Question 28

Hypercalcemia is rare, but hypocalcemia can result from a wide variety of conditions.

Answer 28

true

Question 29

Most blood cells are produced in the red marrow of bones.

Answer 29

true

Question 30

Osteomalacia results in bone brittleness.

Answer 30

false

Question 31

Osteoporosis often leads to an exaggerated thoracic spinal curvature, which is called kyphosis.

Answer 31

true

Question 32

A dark band formed by parallel thick filaments that partly overlap the thin filaments is known as an H band.

Answer 32

false

Question 33

A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis

Answer 33

true

Question 34

An isometric contraction does not change muscle length.

Answer 34

true

Question 35

Clinically, dystrophin is the most important noncontractile protein to occur in muscle fibers.

Answer 35

true

Question 36

Extensibility refers to the ability of a muscle to stretch

Answer 36

true

Question 37

Some smooth muscle is autorhythmic.

Answer 37

true

Question 38

The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.

Answer 38

true

Question 39

The sliding filament theory of muscle contraction has emerged from research only in the last 10 to 15 years.

Answer 39

false