1) when atoms complete their outer electron shell by sharing electrons, they form
a) ionic bonds.
b) covalent bonds.
c) hydrogen bonds.
d) anions.
e) cations.
2) puffer fish poison blocks voltage-gated sodium channels like a cork. what effect
would this neurotoxin have on the function of neurons?
a) neurons would depolarize more rapidly.
b) action potentials would lack a repolarization phase.
c) the absolute refractory period would be shorter than normal.
d) the axon would be unable to generate action potentials.
e) none, because the chemically-gated sodium channels would still function.
3) shortly after gastrulation, the body and organs of the embryo begin to form. this
process is called
a) cleavage.
b) implantation.
c) placentation.
d) embryogenesis.
e) germination.
4) a child with rickets often has
a) oversized facial bones.
b) long fingers.
c) frequent bruises.
d) bowed legs.
e) inadequate muscle development.
5) dividing lymphocytes can be found in the ________ of the lymphatic nodule.
a) sinus
b) germinal center
c) cortex
d) capsule
e) stromba
6) the part of the endometrium that covers the implanted embryo and lacks chorionic
villi is the
a) decidua parietalis.
b) decidua albicans.
c) decidua functionalis.
d) decidua capsularis.
e) decidua basalis.
7) peyer patches are characteristic of the
a) stomach.
b) duodenum.
c) jejunum.
d) ileum.
e) colon.
8) the series of membranous channels that surround each myofibril is the
a) sarcoplasmic reticulum.
b) sarcoplasm.
c) sarcomere.
d) sarcolemma.
e) endomysium.
9) which of following properties of the cytoskeleton is false?
a) supports organelles
b) controls cell shape
c) provides cell strength
d) made of cytobones
e) moves organelles
10) a vitamin obtained from meat that is a coenzyme in amino acid and lipid
metabolism is
a) pyridoxine (b6).
b) pantothenic acid.
c) riboflavin.
d) folic acid (folate).
e) niacin.
11) ________ account(s) for almost two-thirds of the weight of bone.
a) water
b) calcium carbonate
c) collagen fibers
d) fluoride
e) calcium phosphate
12) proteolytic enzymes that digest a path through the zona pellucida include
a) hyaluronidase and hcg.
b) hyaluronidase and acrosin.
c) acrosin and collagenase.
d) relaxin and hyalouronidase.
e) acetic acid and hydrochloric acid.
13) the tissue that always has a “top” and a “bottom” is
a) epithelial tissue.
b) connective tissue.
c) muscle tissue.
d) basal tissue.
e) apical tissue.
14) the layers of bone tissue immediately deep to the periosteum are
a) circumferential lamellae.
b) osteoid plates.
c) trabeculae.
d) concentric lamellae.
e) epiphseal ridges.
15) during the absorptive state,
a) the liver forms glycogen.
b) adipocytes release fatty acids to the circulation.
c) skeletal muscle breaks down glycogen.
d) insulin levels are low.
e) skeletal muscle fibers release glucose.
16) each amino acid differs from another in the
a) number of central carbon atoms.
b) size of the amino group.
c) number of carboxyl groups.
d) nature of the side chain.
e) number of peptide bonds in the molecule.
17) the merging of ________ forms the right lymphatic duct.
a) the right jugular, right subclavian, and right bronchomediastinal trunks
b) the left jugular, right subclavian, and right bronchomediastinal trunks
c) two great vessels
d) the thoracic and mediastinal ducts
e) superior and inferior lymphatic ducts
18) a state of unconsciousness in which an individual cannot be aroused even by strong
stimuli is
a) somnolence.
b) sleep.
c) stupor.
d) coma.
e) a chronic vegetative state.
19) approximately 45% of the blood volume is composed of the ________ .
20) a transport mechanism that can move a substance against a concentration gradient
by using cellular energy is ________.
21) the nerve crucial for breathing that originates within the cervical plexus is called the
________ nerve.
22) describe the basic sequence of events that occurs as an action potential arrives at the
neuromuscular junction and is transmitted to the muscle cell.
23) why is the inferior region of the shoulder joint most vulnerable to dislocation?
24) blood is drained from the liver by the ________.
25) the tetrad of maternal and paternal chromosomes forms during meiosis by the
process called ________.
26) a ________ allele is expressed only when homozygous.
27) give the clinical term for the condition in which the vertebral laminae fail to unite
during development.