Bio 240: Hu man Anatomy & Physiology I Lab Exam # 3 Summer 2017 Dr Precious Alaw
ID: 282108 • Letter: B
Question
Bio 240: Hu man Anatomy & Physiology I Lab Exam # 3 Summer 2017 Dr Precious Alawuru SLIDE B-1: Identify the numbered parts, matching them with the provided answer choices canaliculi central canal lamellae (2) lacuna bone matrix 43. Which of the following combinations of alphabet with the provided answer choices in picture Slide B-1 above is correct. a) A-canal cuti, B-central canal, C = lamellae (2), D-lacuna, E-bone matrix b) A - bone matrix, B- central canal, C lamellae (2), D- lacuna, E canaliculi. c) A-bone matrix. B-central canal, C analiculi, D lamellae (2), E = lacuna. d) A canaliculi, B central canal, C lacuna, D-lamellae (2), E bone matrix 44. Identify Slide B-1 above. a) Osseous tissue b) compact bone e) a and b only are correct c) cancellous or spongy bone d) red marroW SLIDE B-3: Match the labeled part to the correct answer choices. 45. Which of the following answer combinations is/are correct. a) U- transverse process, V lamina, W - spine, X- body, Z - superior articular process b) K - superior articular facet, L - pedicle, M vertebral arch, Y- vertebral foramern, c) K-superior articular process, L = lamina, M = Pedicle, U = transverse process, d) V- vertebral arch, W spine, X -vertebral foramen, Y- body, Z superior articular facet e) A and B onlyExplanation / Answer
43. SLIDE B-1.
A= bone marrow, B= central canal, C= lamellae, D= lacuna, E= canaliculi
A central tube or central canal called a Haversian canal, contains blood vessels and nerves. Lamellae are concentric rings of a strong matrix.
Each lacuna is occupied by a branched cell, termed an osteocyte or bone-cell or bone-corpuscle. It appears as fusiform opaque spot in an ordinary microscopic section. Lacunae are connected to one another by small canals called canaliculi. The canaliculi provide routes by which nutrients can reach the osteocytes and waste products can leave them.
44. In SLIDE B osseous tissue and compact bone can be seen clearly. Spongy bone, red marrow, are not shown diffentiately.
Ans: e) a and b are correct.
Bone tissue (osseous tissue) is a hard or dense connective tissue.
Cancellous bone is the meshwork of spongy tissue (trabeculae) of mature adult bone. It is typically found at the core of vertebral bones in the spine and the ends of the long bones such as the femur or thigh bone. But compact bone also called dense bone is a solidified structure filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes.
SLIDE B-3
Ans: b) K= superior articular facet; L=pedicle; M= vertebral arch; Y= vertebral foramen.
It is the section of a vertebra.
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