1) the sodium-glucose transport protein (sglt) is one example of an active transport
process involving a uniport carrier.
2) the parasympathetic division stimulates digestion.
3) cytotoxic t cells respond only to antigens bound to mhc-i proteins.
4) the liver is the body’s largest gland.
5) there are three codons that do not code for any amino acid.
6) only germ cells undergo meiosis, which produces four haploid cells with 23
chromosomes each.
7) ligand-gated ion channels are membrane proteins that open or close in response to
the binding of a chemical.
8) after a wound is sealed, tissue repair is followed by fibrinolysis.
9) all preganglionic fibers of the ans pass through the sympathetic chain of ganglia,
synapsing at least once there.
10) most nerves are motor nerves.
11) all autonomic output originates in the central nervous system.
12) under normal circumstances, both divisions of the autonomic nervous system are
active simultaneously.
13) a teratogen is most likely to cause __________.
a. a deformity of the limbs
b. aneuploidy
c. trisomy
d. nondisjunction
e. a mutation
14) second-order neurons synapse with third-order neurons in the __________.
a. thalamus
b. dorsal root ganglion
c. spinal cord
d. cerebral cortex
e. medulla oblongata
15) __________ are found especially in the mucous membrane, standing guard against
parasites and allergens.
a. monocytes
b. lymphocytes
c. basophils
d. neutrophils
e. eosinophils
16) what is the white opaque “moon” often found at the proximal end of a fingernail
called?
a. free edge
b. nail body
c. eponychium
d. lunule
e. nail root
17) which of these happens first in an cholinergic synaptic transmission?
a. acetylcholine diffuses across the synaptic cleft
b. a postsynaptic potential is produced
c. sodium enters the postsynaptic cell
d. the synaptic vesicles release acetylcholine
e. acetylcholine binds to ligand-regulated gates
18) in a workout your muscle cells produce lactic acid, yet you maintain a constant
blood ph because _________.
a. metabolic acids are neutralized in muscle cells before released into the blood
b. metabolic bases are produced at the same rate by muscle cells to neutralize the acids
c. the respiratory system removes excess h+ from the blood before the ph is lowered
d. the body contains chemicals called buffers that resist changes in ph
e. endothelial cells secrete excess h+ to prevent a decrease in ph
19) looking at a slide of axillary skin under the microscope, you notice the presence of
__________ glands that are absent on slides of the scalp.
a. merocrine
b. apocrine
c. sebaceous
d. ceruminous
e. perspiration
20) __________ play an important role in cell division, and they are made of
__________.
a. mitochondria; microtubules
b. ribosomes; intermediate filaments
c. nucleoli; microfilaments
d. centrioles; microtubules
e. inclusions; centrosomes
21) the human immunodeficiency virus (hiv) targets mainly __________.
a. helper t cells
b. b cells
c. plasma cells
d. cytotoxic t cells
e. natural killer cells
22) which of the following is predominately made up of myosin?
a. g actin
b. f actin
c. the thin filament
d. the thick filament
e. the elastic filament
23) the background rate of sympathetic and parasympathetic activity is called
___________.
a. “fight-or-flight” activity
b. visceral motor activity
c. autonomic reflex arc activity
d. visceral tone
e. autonomic tone
24) stimuli produced by sound waves reach the brain following which pathway?
a. cochlear duct -> spiral organ -> ossicles -> oval window -> auditory canal ->
tympanic membrane -> fibers of cochlear nerve
b. auditory canal -> tympanic membrane -> oval window -> cochlear duct -> ossicles ->
spiral organ -> fibers of cochlear nerve
c. cochlear duct -> oval window -> auditory canal -> tympanic membrane -> ossicles ->
spiral organ -> fibers of cochlear nerve
d. tympanic membrane -> auditory canal -> ossicles -> oval window -> cochlear duct ->
spiral organ -> fibers of cochlear nerve
e. auditory canal -> tympanic membrane -> ossicles -> oval window -> cochlear duct ->
spiral organ -> fibers of cochlear nerve
25) proteins are __________ built from __________ different amino acids.
a.monomers; 10
b.molecules; 10
c.polymers; 20
d.macromolecules; 40
e.polypeptides; 20
26) whichof the following is notcomposed of cuboidal epithelium?
a. the thin segment of the nephron loop
b. the thick segment of the nephron loop
c. the collecting duct
d. the proximal convoluted tubule
e. the distal convoluted tubule
27) when a clot is no longer needed, fibrin is dissolved by __________.
a. prothrombin
b. thromboplastin
c. kallikrein
d. plasmin
e. platelet-derived growth factor
28) which of the following is true regarding cortisol?
a. it inhibits fat digestion.
b. it stimulates protein synthesis.
c. it promotes glycogen synthesis.
d. it stimulates glucose intake by most organs.
e. it promotes breakdown of fat and protein.
29) basophils of the blood help to get defensive leukocytes to the site quickly by
releasing an anticoagulant called __________ and a vasodilator called __________.
a. bradykinin; histamine
b. selectin; prostaglandin
c. histamine; heparin
d. heparin; histamine
e. prostaglandins; selectin