1) an excess of hydrogen ions in the body fluids can have fatal results because this can
a) break chemical bonds.
b) change the shape of large complex molecules, rendering them nonfunctional.
c) disrupt tissue functions.
d) change body fluid ph.
e) all of the answers are correct.
2) thyroid hormone contains the element
a) fluorine.
b) chlorine.
c) iron.
d) iodine.
e) zinc.
3) two classes of macrophages include
a) mesenchymal cells and melanocytes.
b) mast cells and basophils.
c) fixed macrophages and free macrophages.
d) neutrophils and eosinophils.
e) microphages and adipocytes.
4) secretion of potassium into the urine is
a) increased by adh.
b) associated with the reabsorption of sodium from the distal tubules and collecting
ducts.
c) minimal because the human diet includes very little potassium.
d) an indication of dehydration.
e) all of the answers are correct.
5) all of the following are true of the secondary response of humoral immunity, except
that it
a) depends on memory b cells.
b) results in much higher antibody titers than in the primary response.
c) results in much quicker rise in antibody titers.
d) produces more effective antibodies.
e) weakens quickly because memory b cells only survive for a year or two.
6) the protein that permits stretching and recoiling of the skin is
a) collagen.
b) melanin.
c) keratin.
d) elastin.
e) carotene.
7) the primary spinal curves
a) are also called compensation curves.
b) accommodate the thoracic and abdominopelvic viscera.
c) develop several months after birth.
d) develop several months after birth to accommodate the growing viscera in the
thoracic cavity.
e) all of the answers are correct.
8)
figure 8-3 the femur
identify the structure labeled “3”
a) greater trochanter
b) lesser trochanter
c) head
d) lateral epicondyle
e) lateral condyle
9) each cytochrome contains
a) a lipoprotein.
b) a metal ion.
c) an atp synthase.
d) an inorganic salt.
e) all of the answers are correct.
10) where in the body does the production of precursors for the synthesis of calcitriol
occur?
a) bone
b) kidneys
c) small intestine
d) liver
e) skin
11) the most abundant proteins in blood plasma are
a) globulins.
b) transport proteins.
c) albumins.
d) lipoproteins.
e) fibrinogens.
12) eosinophils function in:
a) destroying antibody-labeled antigens
b) blood coagulation
c) production of surface antigens for red blood cells
d) antibody production
e) production of heparin
13) the four spinal curves include all but one of the following. identify the exception.
a) thoracic
b) cervical
c) lumbar
d) axial
e) sacral
14) straight tubules originate at the seminiferous tubules and form a network of
passageways called the
a) epididymis.
b) ductus deferens.
c) rete testis.
d) efferent ducts.
e) vas deferens.
15) drugs known as calcium channel blockers such as nifedipine can be used to
a) decrease the force of cardiac contraction.
b) decrease blood pressure.
c) dilate the coronary arteries.
d) produce a negative inotropic effect.
e) all of the answers are correct.
16) triggering of the muscle action potential occurs after
a) acetylcholine binds to chemically-gated channels in the end plate membrane.
b) acetylcholinesterase binds to receptors on the end plate.
c) calcium ion binds to channels on the end plate.
d) the nerve action potential jumps across the neuromuscular junction.
e) any of the above can produce an action potential in the muscle cell.
17) changes in the central nervous system that accompany aging include
a) reduction in brain size and weight.
b) decrease in the number of neurons.
c) decreased blood flow to the brain.
d) changes in synaptic organization in the brain.
e) all of the answers are correct.
18) the space between the cheeks or lips and the teeth is called the
a) pharynx.
b) larynx.
c) fauces.
d) vestibule.
e) dip sulcus.
19) the ankle joint is an example of a(n) ________ joint.
a) condylar
b) saddle
c) hinge
d) ball-and-socket
e) gliding
20) the common name for the pollex is the ________.
21) the most abundant plasma protein is ________.
22) the girdles of the appendicular skeleton support the bones of the ________.
23) whenever positive and negative ions have been separated, a(n) ________ will be
produced.
24) the transfer of heat energy by emission of photons is called ________.
25) fatty acids that are necessary for proper health but cannot be synthesized by the
body are called ________.