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1) the portion of the nasal cavity contained within the flexible tissues of the external
nose is the
a) nasopharynx.
b) vestibule.
c) internal chamber.
d) conchae.
e) nasal septum.
2) type ii diabetes is characterized by:
a) a lack of response by target cells to insulin
b) a decrease in secretion by pancreatic beta cells
c) excessive secretion of glucagon
d) inadequate insulin production
e) low blood-glucose concentration
3)
figure 24-1 the stomach (dissected)
identify the structure labeled "3"
a) rugae
b) circular muscle layer
c) oblique muscle layer
d) longitudinal muscle layer
e) submucosa
4) which of the following statements about the action potential is false?
a) the rapid depolarization phase is caused by the entry of potassium ions.
b) during the repolarization phase, sodium channels close and potassium channels open.
c) during the depolarization phase, membrane potential becomes positive.
d) in the after-hyperpolarization phase, membrane potential approaches the potassium
equilibrium potential.
e) repolarization occurs as potassium ions leave the axon.
5) aldosterone
a) is secreted in response to decreased levels of potassium in the blood.
b) promotes sodium retention in the kidneys.
c) helps decrease blood volume and lower blood pressure.
d) regulates blood calcium levels.
e) regulates water reabsorption in the kidneys.
6) the junction type that lets neighboring cells exchange small molecules is the
a) desmosome
b) hemidesmosome
c) gap junction
d) tight junction
e) zonula adherens
7) the atomic number represents the number of
a) electrons in an atom.
b) protons in an atom.
c) neutrons in an atom.
d) protons and neutrons in an atom.
e) chemical bonds the atom may form.
8) in the ets, ________ accepts electrons from one molecule and transfers them to
another.
a) a hydrogen ion
b) a coenzyme
c) the acetyl group
d) adp
e) nad
9) which of the following statements about the golgi apparatus is false?
a) receives transport vesicles from the rer
b) sends transport vesicles to the rer
c) produces lysosomes
d) supplies new membrane components
e) produces secretory vesicles
10) which of the following affects blood flow through the body?
a) blood viscosity
b) turbulence
c) vascular resistance
d) vessel diameter
e) all of the answers are correct.
11) the ability to form concentrated urine depends on the functions of
a) the proximal convoluted tubule.
b) the distal convoluted tubule.
c) the collecting duct.
d) the nephron loop (loop of henle).
e) the loop of henle and the collecting duct.
12) which of the following would increase heart rate?
a) increased sympathetic stimulation of sa node
b) decreased parasympathetic stimulation of nodal fibers
c) increased levels of epinephrine
d) faster depolarization of the pacemaker potential
e) all of the answers are correct.
13) what type of cell makes up almost half the volume of blood?
a) erythrocyte
b) leukocyte
c) platelet
d) monocyte
e) phagocyte
14) the spinal cord is part of the
a) peripheral nervous system.
b) somatic nervous system.
c) central nervous system.
d) autonomic nervous system.
e) afferent nervous system.
