Company Explo A&P; in the Laboratory IEdition: 2lag .com I Printed from www.cheg
ID: 91734 • Letter: C
Question
Company Explo A&P; in the Laboratory IEdition: 2lag .com I Printed from www.chegg.com Define the following terms: Morton Publishing Company Nonaxial boratory dogg gmail.com ed from www.chegg.com Uniaxial joint Biaxial joint Multiaxial joint Chegg 7 Which of the following describes a plane joint correctly? Copyright Morton Publishin a. The convex articular surface of one bone fits into a concave articular surface ofanother boneP in the Laborat Edition: 2 b. One bone rotates around another bone. agg meado93gmaiLcom c. The flat articular surfaces of two bones glide past one another. Printed from www.chegg con d. The rounded, ball-like end of one bone fits into a concave depression of another bone. 8 Which of the following correctly describes a pivot joint? a. The convex articular surface of one bone fits into a concave articular surface of another bone. b. One bone rotates around another bone. c. The flat articular surfaces of two bones glide past one another. The rounded, ball-like end of one bone fits into a concave depression of another bone. d. Copyright Morton Publishing Company Exploring A&P; in the Laboratory mend 09 gmail.com Printed from www chega comExplanation / Answer
Answer:
6. (a) Non-axial joint:
Joints, such as the intertarsal joints, which allow only a very limited movement (e.g. side to side, or back and forth) are called non-axial joint.
(b) Uniaxial joint:
Some joints occurs around one axis and allow movement in only one plane; these joints are uniaxial. One common uniaxial joint is the hinge joint.
(c) Biaxial joint:
Joints occuring around 2 axes and at right angles to each other are called biaxial joints. Examples: saddle and condyloid joints.
(d) Multiaxial joint:
Joints occuring around several axes and allowing all movements are called multiaxial joints. Examples: ball and socket joints.
7. (c) The flat articular surfaces of two bones glide past one another
Explanation:
A plane joint (arthrodial joint, gliding joint, plane articulation) is a synovial joint which, under physiological conditions, allows only gliding movement.
8. (b) One bone rotates around another bone
Explanation:
Pivot joint, also called rotary joint, or trochoid joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament.
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