1) microtubules have which of the following functions?
a) they form structural components of organelles.
b) they move chromosomes during cell division.
c) they provide a mechanism for changing the cell shape.
d) molecular motors move along them.
e) all of the answers are correct.
2) at rest, the tropomyosin molecule is held in place by
a) actin molecules.
b) myosin molecules.
c) troponin molecules.
d) atp molecules.
e) calcium ions.
3) which direction does carbon dioxide move during internal respiration?
a) from the blood into the tissue cells
b) from the blood into the lungs
c) from the lungs into the atmosphere
d) from the tissue cells into the blood
e) from the lungs into the blood
4) in a(n) ________ neuron, the dendrites and axon are continuous or fused.
a) multipolar
b) anaxonic
c) unipolar
d) bipolar
e) interneuron
5) which of the following about cytoplasm is false?
a) extracellular fluid contains more protein
b) the material that fills a cell
c) semi-rigid texture
d) includes cytoskeleton
e) includes cytosol
6) the endoderm forms
a) muscle.
b) blood.
c) neural tissue.
d) skin.
e) the urinary bladder.
7) which region of the stomach does the esophagus connect to?
a) fundus
b) cardia
c) body
d) antrum
e) pylorus
8) a bruise appears as a greenish spot in the skin because
a) hemoglobin has leaked from the blood into the injury and hemoglobin has a green
color.
b) the heme group in the hemoglobin has broken down into biliverdin.
c) bilirubin from hemoglobin recycling has built-up in the bruise.
d) red blood cells are green when they leave circulation.
e) dead white blood cells accumulate at the site of injury.
9) intracellular fluid (icf) is found only within
a) blood vessels.
b) lymph.
c) the cells of the body.
d) the interstitial space.
e) the cerebrospinal fluid.
10) each of the following factors would increase peripheral resistance, except
a) increased sympathetic stimulation.
b) elevated levels of epinephrine.
c) vasodilation.
d) irregularities in the vessel walls caused by plaques.
e) elevated hematocrit.
11) on a field trip you discover a skeleton with the following characteristics: the
acetabulum is directed laterally, the ischial spine points medially, and the angle inferior
to the pubic symphysis is less than 90 degrees. the long bones of the arms and legs are
relatively light and show epiphyseal plates. this skeleton is probably from
a) a young male.
b) a young female.
c) an elderly male.
d) an elderly female.
e) cannot tell on the basis of this information