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Bio10A:  Functions of systems in organisms

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
A person with a broken pelvic girdle would probably be unable to
a.
walk.
c.
raise his or her arm.
b.
turn his or her head.
d.
bend his or her wrist.
 

 2. 
Osteocytes trapped within the spaces in the bone surrounding them
a.
are called marrow cells.
b.
are provided with food and oxygen by Haversian canals.
c.
receive nutrients directly from the cells of the surrounding cartilage.
d.
eventually become osteoblasts as the bone matures.
 
 
bio10a-06_files/i0040000.jpg
 

 3. 
Refer to the illustration above. The joint shown in D would most likely be found in the
a.
shoulder.
c.
knee.
b.
elbow.
d.
wrist.
 

 4. 
Refer to the illustration above. Which figure shows a joint that allows bones to “glide” over each other?
a.
A
c.
C
b.
B
d.
D
 

 5. 
Tendons connect
a.
bone to bone.
c.
muscle to muscle.
b.
muscle to bone.
d.
cartilage to bone.
 

 6. 
A muscle can
a.
push a bone.
b.
pull a bone.
c.
both push and pull a bone simultaneously.
d.
sometimes push and sometimes pull a bone.
 

 7. 
The functional unit of muscle contraction is called the
a.
myofibril.
c.
muscle fiber.
b.
sarcomere.
d.
myosin filament.
 

 8. 
Actin and myosin
a.
are found in the sarcomeres.
c.
interact during muscle contraction.
b.
are proteins.
d.
All of the above
 

 9. 
The total amount of force that a muscle can exert
a.
is determined by the strength of the nerve impulse that caused the contraction.
b.
depends on the total number of individual muscle fibers that have been stimulated.
c.
is dependent upon the weight of the object being moved.
d.
correlates to the number of Z lines contained within the sarcomeres of the muscle.
 

 10. 
Skin receives nutrients, eliminates wastes, and helps regulate body temperature by using which of the following structures?
a.
dermis
c.
hair follicle
b.
blood vessels
d.
sensory nerve
 



 
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