Question

fibrous, cartilaginous, and synovial joints

1. for each joint described below, select an answer from key a. then, if the

key a selection is other than c (synovial joint), classify the joint further by
making a choice from key b.
key a: a. cartilaginous
b. fibrous
c. synovial
key b: 1. gomphosis

1. suture
2. symphysis
3. syndesmosis
4. synchondrosis
5. synostosis

______ 1. characterized by hyaline
cartilage connecting the bony
portions
______ 2. all have a fibrous capsule
lined with a synovial
membrane surrounding a
joint cavity
______ 3. bone regions united by
fibrous connective tissue
______ 4. joints between skull bones
______ 5. joint between atlas and axis
______ 6. hip, elbow, knee, and inter-
carpal joints
______ 7. intervertebral joints (between
vertebral bodies)
______ 8. pubic symphysis
______ 9. all are reinforced by
ligaments
______ 10. costosternal joints 2–7
______ 11. joint providing the most
protection to underlying
structures
______ 12. often contains a fluid - filled
cushion
______ 13. childs epiphyseal plate made
of hyaline cartilage
______ 14. most joints of the limbs
______ 15. teeth in body alveolar
sockets
______ 16. joint between first rib and
manubrium of sternum
______ 17. ossified sutures
______ 18. distal tibiofibular joint

Explanation:

To solve these joint classification problems, we use the definitions of fibrous, cartilaginous, and synovial joints from anatomy (a subfield of Biology, Natural Science). Fibrous joints are united by fibrous connective tissue, cartilaginous by cartilage, and synovial have a synovial cavity. Key B refines fibrous (suture, syndesmosis, gomphosis) and cartilaginous (symphysis, synchondrosis) joints. We analyze each description:

1. Hyaline cartilage (cartilaginous, synchondrosis) → A, 5
2. Synovial cavity (synovial) → C
3. Fibrous connective tissue (fibrous) → B
4. Skull bones (fibrous, suture) → B, 2
5. Atlas - axis (synovial, pivot) → C
6. Limb joints (synovial) → C
7. Intervertebral (cartilaginous, symphysis) → A, 3
8. Pubic symphysis (cartilaginous, symphysis) → A, 3
9. Reinforced by ligaments (synovial) → C
10. Costosternal 2 - 7 (cartilaginous, synchondrosis) → A, 5
11. Most protection (synovial? No, fibrous suture? Wait, skull sutures protect, but synovial have cavities. Wait, sutures (fibrous) protect well. But maybe synovial? No, re - check: sutures (fibrous) are immovable, protect. But the question: "most protection". Alternatively, synovial? No, error. Wait, correct: sutures (fibrous) → B, 2? But maybe the answer is B, 2? Wait, no, the question is "joint providing most protection" → skull sutures (fibrous, suture) → B, 2?
12. Fluid - filled cushion (synovial, meniscus) → C
13. Epiphyseal plate (cartilaginous, synchondrosis) → A, 5
14. Limb joints (synovial) → C
15. Teeth (fibrous, gomphosis) → B, 1
16. First rib - manubrium (cartilaginous, synchondrosis) → A, 5
17. Ossified sutures (fibrous, synostosis) → B, 6
18. Distal tibiofibular (fibrous, syndesmosis) → B, 4

Answer:

1. A, 5
2. C
3. B
4. B, 2
5. C
6. C
7. A, 3
8. A, 3
9. C
10. A, 5
11. B, 2 (or C? Re - check: sutures are fibrous, immovable, protect. So B, 2)
12. C
13. A, 5
14. C
15. B, 1
16. A, 5
17. B, 6
18. B, 4

(Note: For question 11, if "most protection" refers to synovial (e.g., hip), but sutures are more protective. The answer depends on textbook definitions. Here, we follow fibrous (suture) as protective. Adjust if needed based on course material.)