Study of cranial and facial bones, Study of paranasal sinuses

Multiple-Choice Questions (MCQs)

1. Which animal typically has a prominent frontal bone?
   • A) Dog
   • B) Ox
   • C) Horse
   • D) Pig
     Answer: C) Horse
2. How many cervical vertebrae do most mammals, including oxen and horses, have?
   • A) 5
   • B) 6
   • C) 7
   • D) 8
     Answer: C) 7
3. What structure forms the anterior boundary of the oral cavity?
   • A) Hard palate
   • B) Lips
   • C) Soft palate
   • D) Teeth
     Answer: B) Lips
4. Which species has a lightweight skull with a beak structure?
   • A) Dog
   • B) Fowl
   • C) Pig
   • D) Ox
     Answer: B) Fowl
5. The maxillary sinus is less developed in which of the following animals?
   • A) Horse
   • B) Ox
   • C) Dog
   • D) Pig
     Answer: C) Dog
6. Which animal has a flat skull profile with prominent maxillary bones?
   • A) Horse
   • B) Pig
   • C) Dog
   • D) Ox
     Answer: B) Pig
7. What type of cavity extends from the nostrils to the choanae?
   • A) Oral cavity
   • B) Nasal cavity
   • C) Orbital cavity
   • D) Cranial cavity
     Answer: B) Nasal cavity
8. Which species has cervical vertebrae that can number up to 25?
   • A) Dog
   • B) Fowl
   • C) Horse
   • D) Pig
     Answer: B) Fowl
9. The cranial cavity is primarily formed by which type of bones?
   • A) Facial bones
   • B) Cranial bones
   • C) Cervical vertebrae
   • D) Maxillary bones
     Answer: B) Cranial bones
10. The orbital cavity in horses is characterized by being a complete bony circle. True or False?
    • A) True
    • B) False
      Answer: A) True

True/False Statements

1. The ox has a rounded skull compared to other species. (False)
2. All mammals typically have seven cervical vertebrae. (True)
3. The nasal cavity is divided into three regions: vestibule, respiratory, and olfactory. (True)
4. Fowl have a heavy skull structure compared to mammals. (False)
5. The maxillary sinus is well developed in dogs. (False)
6. The frontal bone is less prominent in horses than in oxen. (False)
7. The oral cavity is bounded posteriorly by the soft palate. (True)
8. Pigs have a flat face with large nasal openings. (True)
9. The cranial cavity encloses the brain and is formed by facial bones. (False)
10. Horses have significant flexibility in their neck due to their cervical vertebrae structure. (True)

Fill in the Blanks

1. The ________ bone is prominent in horses and contributes to their large frontal sinus.
   Answer: Frontal
2. The oral cavity is bounded by the ________ anteriorly.
   Answer: Lips
3. Most mammals, including oxen and horses, have ________ cervical vertebrae.
   Answer: Seven
4. The ________ cavity contains three regions: vestibule, respiratory, and olfactory.
   Answer: Nasal
5. In fowl, the cervical vertebrae can vary up to ________ in number.
   Answer: Twenty-five
6. The maxillary sinus is less developed in ________ compared to other species.
   Answer: Dogs
7. The ________ cavity is formed by several bones including the frontal and zygomatic bones.
   Answer: Orbital
8. Pigs are characterized by a ________ skull profile with prominent maxillary bones.
   Answer: Flat
9. The cranial cavity is primarily formed by ________ bones.
   Answer: Cranial
10. The paranasal sinuses help reduce skull weight and affect vocal ________.
    Answer: Resonance