1) blood flow through a capillary bed is regulated by precapillary sphincters.
2) lung tissue receives nourishment and waste removal from the pulmonary circuit.
3) the first haploid stage of spermatogenesis is prophase ii.
4) a person develops anti-a antibodies only after he is exposed to antigen a, and anti-b
antibodies only after he is exposed to antigen b.
5) there are three cranial nerves involved in eye movement and two in the sense of taste.
6) the greater the concentration gradient, the faster the diffusion rate.
7) the cut of a guillotine is an example of a section done in the midsagittal plane.
8) life expectancy has steadily increased in the last century, whereas life span has not.
9) sympathetic nerve fibers trigger the secretion of nitric oxide, which dilates the deep
arteries allowing blood to engorge the penis.
10) pyrogens act by increasing the set point for body temperature in the thalamus.
11) the cerebellum exhibits folds called gyri separated by grooves called sulci.
12) gut-brain peptides are secreted by the brain and target the gastrointestinal tract.
13) circulating wbcs spend most of their lives in the bloodstream.
14) clonal selection of t cells happens in the thymus.
15) many effects of growth hormone are mediated by insulin-like growth factors (igfs)
secreted by the pancreas.
16) __________ epithelium provides a moist and slippery surface and is well suited to
resist stress, as seen in the __________.
a. transitional; tongue
b. keratinized; tongue
c. nonkeratinized; skin
d. keratinized; skin
e. nonkeratinized; vagina
17) the __________ can be easily palpated between the clavicles.
a. xiphoid process
b. suprasternal notch
c. body of the sternum
d. costal cartilage
e. costal groove
18) all of the following are found on the temporal bone except the __________.
a. zygomatic process
b. mastoid process
c. external acoustic meatus
d. sella turcica
e. mandibular fossa
19) why does one continue to breathe heavy after rigorous physical activity has
stopped?
a. the diaphragm is waiting for its acetylcholine to run out.
b. the body requires more oxygen to restore levels of atp and creatine phosphate.
c. the lungs can’t stop breathing until the heart rate slows down.
d. myosin heads need more oxygen to fully detach from actin.
e. the kidneys require oxygen to dispose of excess lactic acid.
20) the right and left cerebral hemispheres are separated from each other by
__________.
a. many sulci
b. many gyri
c. the brainstem
d. the longitudinal fissure
e. the corpus callosum
21) mucus plays an important role in cleansing inhaled air. it is produced by
__________ of the respiratory tract.
a. squamous alveolar cells
b. great alveolar cells
c. the pleurae
d. ciliated cells
e. goblet cells
22) the __________ belongs to the thoracic cage, whereas the __________ belongs to
the pectoral girdle.
a. sternum; clavicle
b. clavicle; sternum
c. vertebra t5; vertebra t1
d. scapula; clavicle
e. scapula; sternum
23) to tip the soles of the feet medially, so they face each other, requires __________.
tipping them out laterally so they face away from each other is __________.
a. dorsiflexion; plantar flexion
b. inversion; eversion
c. medial excursion; lateral excursion
d. opposition; reposition
e. retraction; protraction
24) what is the purpose of motor nerve varicosities as they relate to smooth muscle?
a. they link the thin filaments to the inside of the sarcolemma in smooth muscle.
b. they reabsorb the decomposition products of acetylcholine after acetylcholinesterase
breaks it down.
c. theyenable each cardiac myocyte to directly stimulate its neighbors.
d. they release neurotransmitter onto smooth muscle cells.
e. they prevent single-unit smooth muscle cells from pulling apart.
25) which of the following is not a derivative of ectoderm?
a. salivary glands
b. the nervous system
c. the epidermis
d. cutaneous glands
e. the dermis
26) an increased erythropoietin (epo) output by the kidneys would lead to all of the
following except __________.
a. increased hypoxemia
b. increased blood osmolarity
c. increased rbc production
d. increased blood viscosity
e. increased hematocrit