PRACTICE RAT DISSECTION TEST

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Presentation transcript:

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 16 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. 16

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. 11 12

Questions Identify the following structures: 13 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? 23

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