1) a hormone that can lower blood levels of calcium ion is
a) parathyroid hormone.
b) thyroxine.
c) calcitonin.
d) glucagon.
e) oxytocin.
2) the surface of articular cartilage is
a) slick.
b) flat.
c) smooth.
d) rough.
e) both slick and smooth.
3) when a rod is stimulated by light,
a) the plasma membrane becomes hyperpolarized.
b) the retinal changes from the 11-cis to the 11-trans form.
c) less neurotransmitter is released.
d) cgmp decreases and sodium channels close.
e) all of the answers are correct.
4) an enzyme that digests proteins into peptides is
a) lipase.
b) amylase.
c) nuclease.
d) maltase.
e) trypsin.
5) gustatory receptors are located
a) in the eye.
b) in the ear.
c) on the surface of the tongue.
d) in the nose.
e) on the skin.
6) compared to the male pelvis, the female pelvis
a) is larger.
b) is heavier.
c) has a greater angle inferior to the pubic symphysis.
d) has a thicker ischial tuberosity.
e) has deep acetabula.
7) the t wave on an ecg tracing represents
a) atrial depolarization.
b) atrial repolarization.
c) ventricular depolarization.
d) ventricular repolarization.
e) ventricular contraction.
8) the white matter of the spinal cord contains
a) bundles of axons with common origins, destinations, and functions.
b) bundles of dendrites with common origins, destinations, and functions.
c) sensory and motor nuclei.
d) both axons and dendrites.
e) interneurons.
9) immunoglobulins that are primarily found in glandular secretions such as saliva and
tears are
a) iga.
b) igd.
c) ige.
d) igg.
e) igm.
10) low ph alters hemoglobin structure so that oxygen binds less strongly to
hemoglobin at low po2. this increases the effectiveness of
a) external respiration.
b) internal respiration.
c) carbon dioxide transport.
d) hemoglobin synthesis.
e) acid-base balance.
11) the penetration of the endometrium by the blastocyst is referred to as
a) cleavage.
b) implantation.
c) placentation.
d) embryogenesis.
e) fertilization.