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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Questions

• Identify the following structures:

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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

• 24. What muscle of the rat functions to elevate the jaw?

• 25. What muscle of the thorax has been separated in the photo?

Cranial end

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