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1) many medications introduced into the bloodstream cannot directly affect the neurons
of the cns because
a) oligodendrocytes form a continuous myelin sheath around the axons.
b) the endothelium of cns capillaries forms a blood-brain barrier.
c) the neurolemma is impermeable to most molecules.
d) ependymal cells restrict the flow of interstitial fluid between the capillaries and the
neurons.
e) astrocytes form a capsule around neurons.
2) movements unique to the large intestine are ________ movements.
a) peristaltic
b) segmentation
c) mass
d) pendular
e) writhing
3) the waste product bilirubin is produced from
a) globin chains of hemoglobin.
b) heme molecules plus iron.
c) heme molecules lacking iron.
d) iron found in hemoglobin molecules.
e) abnormal proteins found in red blood cells.
4) the auditory tubes open into the
a) nasopharynx.
b) oropharynx.
c) laryngopharynx.
d) larynx.
e) nasal cavity.
5) various types of macrophages are derived from
a) lymphocytes.
b) monocytes.
c) neutrophils.
d) eosinophils.
e) basophils.
6) ab a + b is to decomposition as a + b ab is to
a) exchange.
b) synthesis.
c) combustion.
d) replacement.
e) metabolism.
7) chondroitin sulfate is abundant in the matrix of
a) epithelial tissue.
b) cartilage.
c) areolar tissue.
d) elastic connective tissue.
e) adipose tissue.
8) the vitamin that is essential for the production of several clotting factors is vitamin
a) a.
b) b.
c) e.
d) c.
e) k.
9) the levator ani inserts on the
a) iliac crest.
b) coccyx.
c) ischial spine.
d) central tendon of the perineum.
e) sacrum.
10)
figure 26-1 the structure of the kidney
identify the structure labeled "8"
a) renal pelvis
b) minor calyx
c) ureter
d) major calyx
e) renal column
11) the interconnecting tiny arches of bone tissue found in spongy bone are called
a) osteons.
b) trabeculae.
c) concentric lamellae.
d) interstitial lamellae.
e) lacunae.
12) the heart is known to secrete all of the following hormones, except
a) anp.
b) bnp.
c) thymosin.
d) thyroxine.
e) thymosin and thyroxine.
13) which of the following does not influence the time necessary for a nerve impulse to
be transmitted?
a) length of the axon
b) presence or absence of a myelin sheath
c) diameter of the axon
d) presence or absence of nodes
e) whether or not the impulse begins in the cns
14) the basal nuclei
a) initiate conscious motor activity.
b) activate spinal reflexes.
c) provide the background patterns of movement involved in voluntary motor activities.
d) exert direct control over lower motor neurons.
e) act as gatekeepers, filtering out unnecessary sensorimotor activity.
15) which of these enhance the absorptive effectiveness of the small intestine?
a) the plicae circulares
b) the villi
c) the microvilli
d) intestinal movements
e) all of the answers are correct.
16) the only knee flexor that originates superior to the acetabulum is the
a) biceps femoris.
b) gracilis.
c) sartorius.
d) iliopsoas.
e) semimembranosus.
17) the placenta is a source of which of these hormones?
a) hcg
b) relaxin
c) placental lactogen
d) progesterone
e) all of the answers are correct.
18) examination of a sample of glandular cells reveals an extensive network of smooth
endoplasmic reticulum. which of the following is the likeliest product of these cells?
a) digestive enzymes
b) steroid hormones
c) protein hormones
d) transport proteins
e) antibodies
