Oorsig/Review
1. Trace minerals are required at
concentrations of less than how many parts
per million?
a.
b.
c.
d.
e.
1
10
100
1000
10,000
2. Which 4 trace minerals are generally
recognized as the most problematic in
grazing beef cattle?
SMS code: a71102
6. A study in the United States have found
what percentage of infertile men to have
elevated levels of ROS in their seminal
plasma?
a.
b.
c.
d.
e. 15%
4%
34%
40%
9,8%
7. Reactive oxygen species are generated by
sperm metabolism and are required for:
a.
b.
c.
d.
e. H, O, Ag, C
P, S Ca, S
Co, Fe, Mo, Mg
Zn, Se, Mn, Cu
I, K, He, Cl a.
b.
c.
d.
e. Maturation
Capacitation and acrosome reaction
Modification of cellular compounds
None of the above
All of the above
a.
b.
c.
d.
e. Too much oxygen in the air
Increased exposure to or production of
oxidants
Lack of oxygen
All of the above
None of the above a.
b.
c.
d.
e. Sperm
Leucocytes
Scar tissue
A & B
B & C
a.
b.
c.
d.
e. Vitamin A
Vitamin C
Glutathione
β-carotene
All of the above a.
b.
c.
d.
e. Normal cellular processes (sperm
production)
Inflammatory events (disease conditions)
Stressful events (weaning, mating) and
environmental factors (heat stress, drought)
All of the above
None of the above
a.
b.
c.
d.
e. Copper, Zinc, Manganese
Sulphur, Copper, Selenium
Molybdenum, Magnesium, Manganese
Cobalt, Calcium, Potassium
Iodine, Sodium, Carbon
3. Oxidative stress is caused by
4. Non-enzymatic antioxidants include the
following
5. Spermatozoa are unique in their
susceptibility to ROS since they lack the
necessary cytoplasmic-enzyme repair
systems that make them unable to restore
the damage induced by oxidative stress.
a.
b.
c.
d.
e.
True
False
Maybe
Don’t know
All of the above
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8. ROS is produced by
9. Reactive oxygen species are produced by
living organisms as a result of:
10. Iron is a potent antagonist of which
minerals?
•
•
•
10
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