Transcript practice rat dissection test

PRACTICE RAT
DISSECTION TEST
PRACTICE TEST
• The test is normally called a
dissection “practical”. This is
how most dissection tests are
given!
• Pans of dissected rats are
situated around the lab in
strategic locations.
• Each rat will have two-three
numbered pins stuck in various
structures.
• A question card will
accompany the rat and the
pins.
• You MUST be sure to read the
question card as you look at
the pins.
PRACTICE TEST
• On some tests there will
also be a written portion.
• You will be given a word
bank to assist you.
• The photos in this
practice test may or may
not have pins in the rat
but may simply use an
arrow like in this pig
example.
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PRACTICE TEST
• On the answer sheet for this practice test,
go to number one and using the terms to
know sheet from your dissection packet,
go to number one. Use your dissection
packet and your “Terms to know” packet to
help you figure out the answer.
Questions
• 1. What term refers to the “tail-end” of the
rat?
• 2. The moveable end of muscle
attachment is known as the…
• 3. Muscles that straighten a body part
such as the arm are……
Questions
• 4. What does cephalization mean?
• 5. A term that describes a paw or foot with
5 digits is….
• 6. A narrow band of dense regular
connective tissue that connects muscle to
bone is….
Questions
• 7. Appendages, such as arms and legs,
are found on what division of the body?
• 8 & 9. Mammals may be distinguished
from all other animals by the presence of?
• 10. How do you distinguish Rattus
norvegicus from Rattus rattus in a
laboratory bred rat? Be specific.
Questions
• Identify the following structures – be sure
to use the anatomical terms and not the
common name.
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12
Questions
• Identify the following structures:
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15
14
Questions
• 16. What is this reduced eye structure
found in mammals?
Questions
• 17 & 18 The trunk of the body can be
divided into?
• 19. What is the sex of this rat?
questions
• 20 & 21 What two
parts of the rat’s foot
left this print?
• 22. Rats place just
their toes on the
substrate. What type
of gait is this?
Questions
• 23. What is the name of this tendon on the
abdomen of the rat?
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Questions
Cranial end
• 24. What muscle of
the rat functions to
elevate the jaw?
• 25. What muscle of
the thorax has been
separated in the
photo?
Caudal end
questions
• 26. Of the muscles below; which originates
on the humerus, inserts on the ulna, and
extends the forearm?
questions
• 27. What is the origin of the latissimus
dorsi?
• 28. What is the action of the external
oblique?
• 29. What muscle is usually removed with
the skinning of the rat?
• 30. What is the largest of the hind leg
muscles of the rat?
Answers
•
•
•
•
1. caudal
2. Insertion
3. externsors
4. nervous tissue in
well-defined head
• 5. pentadactyl
• 6. tendon
• 7. trunk
• 8/9 hair & mammary
glands
• 10. length of tail;
R.rattus tail is longer
than body
• 11. vibrissae
• 12. pinna
• 13. nare
• 14. mouth
Answers
• 15. eye
• 16. plica semilunaris
• 17/18 thorax &
abdomen
• 19. male
• 20/21 tori & claws
• 22. digitigrade
• 23. linea alba
•
•
•
•
24. masseter
25. pectoralis major
26. triceps brachii
27. thoracic & lumbar
vertebrae
• 28. constrict
abdominal region
• 29. cutaneous
maximus
• 30. biceps femoris