BackANP Exam #3 Review: Bone Tissue and Skeletal System Study Guidance
Study Guide - Smart Notes
Tailored notes based on your materials, expanded with key definitions, examples, and context.
Q1a. Differentiate between long bones, short bones, flat bones, irregular bones, and sesamoid bones.
Background
Topic: Bone Classification
This question tests your understanding of the different types of bones based on their shapes and functions in the human body.
Key Terms:
Long bones: Typically longer than they are wide, mostly found in limbs.
Short bones: Nearly equal in length and width, found in wrists and ankles.
Flat bones: Thin, flattened, and usually curved, such as the sternum and skull bones.
Irregular bones: Complicated shapes that do not fit other categories, like vertebrae.
Sesamoid bones: Small, round bones embedded within tendons, e.g., the patella.
Step-by-Step Guidance
Start by defining each bone type based on its shape and general location in the body.
Think of examples for each type (e.g., femur for long bone, carpals for short bone).
Consider the functional significance of each bone type (e.g., long bones act as levers, flat bones protect organs).
Compare and contrast the features that distinguish each category from the others.
Try describing each bone type and their differences before checking the answer!
Q1b. Differentiate between intramembranous bone and endochondral bone.
Background
Topic: Bone Development (Ossification)
This question focuses on the two main processes by which bones are formed during development.
Key Terms:
Intramembranous ossification: Bone develops directly from mesenchymal tissue.
Endochondral ossification: Bone develops by replacing hyaline cartilage.
Step-by-Step Guidance
Define each process and identify the starting tissue (mesenchyme vs. cartilage).
List examples of bones formed by each process (e.g., flat bones of the skull for intramembranous, long bones for endochondral).
Summarize the main steps involved in each type of ossification.
Highlight the key differences in the sequence and outcome of each process.
Try outlining the differences before revealing the answer!
Q1c. Differentiate between compact and spongy bone.
Background
Topic: Bone Tissue Structure
This question tests your knowledge of the two main types of bone tissue and their structural and functional differences.
Key Terms:
Compact bone: Dense, solid bone tissue forming the outer layer of bones.
Spongy bone: Porous, lattice-like bone tissue found inside bones.
Step-by-Step Guidance
Describe the microscopic structure of each type (e.g., osteons in compact bone, trabeculae in spongy bone).
Identify where each type is typically located in a long bone.
Discuss the functional roles of each type (e.g., support, storage of marrow).
Compare their appearance and mechanical properties.
Try listing the differences before checking the answer!
Q2. Identify all bone markings and surface features.
Background
Topic: Bone Markings and Anatomy
This question requires you to recognize and name the various projections, depressions, and openings found on bones.
Key Terms:
Examples: foramen, fossa, condyle, tubercle, crest, spine, meatus, sinus, etc.
Step-by-Step Guidance
Review the definitions of common bone markings (e.g., foramen = hole, fossa = depression).
Match each term to its description and typical location on bones.
Practice identifying these features on diagrams or models.
Try matching each term to its definition before revealing the answer!
Q3. Diagram and label the structure of a typical long bone.
Background
Topic: Long Bone Anatomy
This question tests your ability to visually represent and label the main parts of a long bone.
Key Terms:
Diaphysis, epiphysis, metaphysis, periosteum, endosteum, medullary (marrow) cavity, articular cartilage, compact bone, spongy bone, epiphyseal plate/line.
Step-by-Step Guidance
Draw an outline of a long bone (e.g., femur or humerus).
Label the shaft (diaphysis) and the ends (epiphyses).
Indicate the location of the metaphysis and epiphyseal plate/line.
Show the periosteum (outer covering) and endosteum (lining the marrow cavity).
Identify the compact bone, spongy bone, and marrow cavity.
Try drawing and labeling before checking the answer!
Q4. Compare the histological characteristics of spongy and dense bone tissue.
Background
Topic: Bone Histology
This question focuses on the microscopic differences between spongy (cancellous) and compact (dense) bone.
Key Terms:
Osteon (Haversian system), trabeculae, lamellae, canaliculi, lacunae, central canal.
Step-by-Step Guidance
Describe the organization of compact bone (osteons, central canals, concentric lamellae).
Describe the structure of spongy bone (trabeculae, spaces for marrow).
Compare the arrangement of cells and matrix in each type.
Discuss how these structures relate to their functions.
Try outlining the differences before revealing the answer!
Q5. Diagram and label a Haversian system.
Background
Topic: Compact Bone Microanatomy
This question tests your ability to recognize and label the components of an osteon (Haversian system).
Key Terms:
Central (Haversian) canal, concentric lamellae, lacunae, canaliculi, osteocyte.
Step-by-Step Guidance
Draw a cross-section of an osteon, showing the central canal in the middle.
Label the concentric rings (lamellae) around the canal.
Indicate the small spaces (lacunae) containing osteocytes.
Show the tiny channels (canaliculi) connecting lacunae.
Try drawing and labeling before checking the answer!
Q6. Contrast the steps involved in intramembranous and endochondral ossification and what type of bones are formed by each.
Background
Topic: Bone Formation Processes
This question asks you to compare the sequence of events in the two main types of bone formation and the bones they produce.
Key Terms:
Ossification, mesenchyme, cartilage model, primary ossification center, secondary ossification center.
Step-by-Step Guidance
List the main steps of intramembranous ossification (e.g., mesenchymal cells differentiate directly into bone).
List the main steps of endochondral ossification (e.g., cartilage model forms first, then is replaced by bone).
Identify which bones are formed by each process.
Highlight the differences in timing, location, and sequence.
Try outlining the steps before revealing the answer!
Q7. List five (5) functions of the skeletal system.
Background
Topic: Skeletal System Functions
This question tests your knowledge of the major roles the skeleton plays in the body.
Key Terms:
Support, protection, movement, mineral storage, blood cell production (hematopoiesis), fat storage.
Step-by-Step Guidance
Recall the main structural and physiological functions of bones.
List at least five distinct functions, providing a brief explanation for each.
Try listing the functions before checking the answer!
Q8. Explain bone construction and destruction as a homeostatic mechanism.
Background
Topic: Bone Remodeling and Homeostasis
This question focuses on how bone is continuously built up and broken down to maintain balance in the body.
Key Terms:
Osteoblasts (build bone), osteoclasts (break down bone), remodeling, homeostasis.
Step-by-Step Guidance
Describe the roles of osteoblasts and osteoclasts in bone remodeling.
Explain why bone construction and destruction must be balanced.
Discuss how this process helps maintain calcium levels and bone strength.
Try explaining the mechanism before revealing the answer!
Q9. Discuss the conditions for normal bone growth.
Background
Topic: Bone Growth Requirements
This question tests your understanding of the factors necessary for healthy bone development.
Key Terms:
Nutrition (calcium, vitamin D), hormones (growth hormone, sex hormones), physical activity.
Step-by-Step Guidance
List the nutrients and hormones essential for bone growth.
Explain the role of physical activity in stimulating bone formation.
Discuss the importance of a balanced diet and hormonal regulation.
Try listing the conditions before checking the answer!
Q10. Describe how endochondral bone is formed.
Background
Topic: Endochondral Ossification
This question asks you to outline the process by which most bones in the body are formed from a cartilage model.
Key Terms:
Cartilage model, primary ossification center, secondary ossification center, epiphyseal plate.
Step-by-Step Guidance
Describe the initial formation of a hyaline cartilage model.
Explain the development of the primary ossification center in the diaphysis.
Discuss the invasion of blood vessels and formation of bone tissue.
Mention the formation of secondary ossification centers in the epiphyses.
Try outlining the steps before revealing the answer!
Q11. Describe the repair of bone fracture.
Background
Topic: Bone Healing
This question tests your knowledge of the stages involved in bone repair after a fracture.
Key Terms:
Hematoma, fibrocartilaginous callus, bony callus, bone remodeling.
Step-by-Step Guidance
List the four main stages of bone healing after a fracture.
Briefly describe what happens in each stage (e.g., hematoma formation, callus formation).
Explain the role of osteoblasts and osteoclasts in the process.
Try outlining the stages before checking the answer!
Q12. Describe how intramembranous (membrane) bone is formed.
Background
Topic: Intramembranous Ossification
This question asks you to explain the process by which certain bones (mainly flat bones) are formed directly from mesenchymal tissue.
Key Terms:
Mesenchymal cells, ossification center, osteoblasts, spongy bone, compact bone.
Step-by-Step Guidance
Describe the aggregation of mesenchymal cells and their differentiation into osteoblasts.
Explain the formation of ossification centers and secretion of bone matrix.
Discuss the development of spongy bone and eventual formation of compact bone layers.
Try outlining the steps before revealing the answer!
Q13. Explain the homeostatic mechanism for regulating blood calcium levels. Include Parathyroid hormone and Calcitonin in your answer.
Background
Topic: Calcium Homeostasis
This question tests your understanding of how the body maintains stable blood calcium levels using hormones.
Key Terms:
Parathyroid hormone (PTH), calcitonin, osteoclasts, osteoblasts, calcium absorption and excretion.
Step-by-Step Guidance
Describe the role of parathyroid hormone in increasing blood calcium levels (stimulates osteoclasts, increases absorption in intestines and kidneys).
Describe the role of calcitonin in lowering blood calcium levels (inhibits osteoclasts, promotes calcium deposition in bone).
Explain how these hormones work together to maintain homeostasis.
Try explaining the mechanism before revealing the answer!
Q1a (Chapters 7 & 8). Differentiate between the axial and appendicular skeleton.
Background
Topic: Skeletal System Organization
This question tests your ability to distinguish between the two main divisions of the skeleton.
Key Terms:
Axial skeleton: skull, vertebral column, rib cage.
Appendicular skeleton: limbs and girdles (pectoral and pelvic).
Step-by-Step Guidance
Define the axial skeleton and list its major components.
Define the appendicular skeleton and list its major components.
Compare their functions and locations in the body.
Try outlining the differences before revealing the answer!
Q1b. Differentiate between the single and paired cranial bones.
Background
Topic: Skull Anatomy
This question tests your knowledge of which cranial bones are single (unpaired) and which are paired.
Key Terms:
Single cranial bones: frontal, occipital, sphenoid, ethmoid.
Paired cranial bones: parietal, temporal.
Step-by-Step Guidance
List all cranial bones and identify which are single and which are paired.
Consider their locations in the skull.
Try listing the bones before checking the answer!
Q1c. Differentiate between the single and paired facial bones.
Background
Topic: Skull Anatomy
This question tests your ability to identify which facial bones are single and which are paired.
Key Terms:
Single facial bones: mandible, vomer.
Paired facial bones: maxilla, zygomatic, nasal, lacrimal, palatine, inferior nasal concha.
Step-by-Step Guidance
List all facial bones and identify which are single and which are paired.
Consider their locations and functions.
Try listing the bones before checking the answer!
Q1d. Differentiate between the cervical curve, thoracic curve, lumbar curve, and sacral curve of the vertebral column.
Background
Topic: Vertebral Column Anatomy
This question tests your understanding of the normal curvatures of the vertebral column and their locations.
Key Terms:
Cervical curve, thoracic curve, lumbar curve, sacral curve.
Step-by-Step Guidance
Identify the location of each curve in the vertebral column.
Describe the direction of each curve (concave or convex anteriorly).
Discuss the functional significance of these curves.
Try outlining the differences before revealing the answer!
Q1e. Differentiate between the three malformities of the vertebral column.
Background
Topic: Vertebral Column Disorders
This question tests your knowledge of common abnormal curvatures of the spine.
Key Terms:
Scoliosis, kyphosis, lordosis.
Step-by-Step Guidance
Define each malformity and describe its appearance.
Identify which part of the spine is affected in each condition.
Discuss possible causes or consequences.
Try defining each malformity before checking the answer!
Q1f. Differentiate between the pectoral girdle and pelvic girdle.
Background
Topic: Girdles of the Skeleton
This question tests your understanding of the bones that connect the limbs to the axial skeleton.
Key Terms:
Pectoral girdle: clavicle and scapula.
Pelvic girdle: hip bones (ilium, ischium, pubis).
Step-by-Step Guidance
List the bones that make up each girdle.
Describe their locations and functions.
Compare their roles in supporting limb movement.
Try outlining the differences before revealing the answer!
Q1g. Differentiate between the various digits in the phalanges of the hand and foot.
Background
Topic: Phalanges Anatomy
This question tests your knowledge of the number and arrangement of phalanges in the hands and feet.
Key Terms:
Phalanges: proximal, middle, distal (thumb and big toe have only two).
Step-by-Step Guidance
Identify the number of phalanges in each digit of the hand and foot.
Note the differences between the thumb/big toe and other digits.
Compare the arrangement in hands versus feet.
Try outlining the differences before revealing the answer!
Q2. List all of the bones of the axial skeleton and describe their location that are listed on your bone chart.
Background
Topic: Axial Skeleton Anatomy
This question tests your ability to identify and locate the bones of the axial skeleton.
Key Terms:
Skull, vertebral column, ribs, sternum, hyoid bone.
Step-by-Step Guidance
List the major groups of bones in the axial skeleton.
Identify the specific bones within each group.
Describe the location of each bone or group.
Try listing and locating the bones before checking the answer!
Q3. List all of the bones of the appendicular skeleton and describe their location.
Background
Topic: Appendicular Skeleton Anatomy
This question tests your ability to identify and locate the bones of the appendicular skeleton.
Key Terms:
Pectoral girdle, upper limbs, pelvic girdle, lower limbs.
Step-by-Step Guidance
List the major groups of bones in the appendicular skeleton.
Identify the specific bones within each group.
Describe the location of each bone or group.
Try listing and locating the bones before checking the answer!
Q4. List and identify on the human skull the sagittal, coronal, lambdoidal and squamous sutures.
Background
Topic: Skull Sutures
This question tests your ability to identify the major sutures of the skull and their locations.
Key Terms:
Sagittal suture, coronal suture, lambdoidal suture, squamous suture.
Step-by-Step Guidance
Define each suture and its location on the skull.
Practice identifying these sutures on diagrams or models.
Try identifying the sutures before checking the answer!
Q5. List and describe the location of the 4 fontanelles in the newborn or fetal skull.
Background
Topic: Fontanelles of the Skull
This question tests your knowledge of the soft spots in the fetal and newborn skull and their locations.
Key Terms:
Anterior fontanelle, posterior fontanelle, sphenoidal (anterolateral) fontanelle, mastoid (posterolateral) fontanelle.
Step-by-Step Guidance
List the four fontanelles by name.
Describe the location of each fontanelle on the skull.
Try listing and locating the fontanelles before checking the answer!
Q6. List and describe the location of the frontal, maxillary and sphenoidal sinuses.
Background
Topic: Paranasal Sinuses
This question tests your ability to identify the major sinuses in the skull and their locations.
Key Terms:
Frontal sinus, maxillary sinus, sphenoidal sinus.
Step-by-Step Guidance
List each sinus by name.
Describe the location of each sinus in relation to the bones of the skull.
Try listing and locating the sinuses before checking the answer!
Q7. List the five regions of the vertebral column and the number of vertebrae in each region.
Background
Topic: Vertebral Column Anatomy
This question tests your knowledge of the organization of the vertebral column.
Key Terms:
Cervical, thoracic, lumbar, sacral, coccygeal regions.
Step-by-Step Guidance
List the five regions of the vertebral column.
State the typical number of vertebrae in each region.
Try listing the regions and numbers before checking the answer!
Q8. Compare the principal structural differences between male and female skeletons, especially those that pertain to the pelvis.
Background
Topic: Sexual Dimorphism in the Skeleton
This question tests your understanding of the anatomical differences between male and female skeletons, focusing on the pelvis.
Key Terms:
Pelvic inlet, subpubic angle, sacrum, overall bone size and robustness.
Step-by-Step Guidance
List the general differences between male and female skeletons (e.g., size, robustness).
Describe the specific differences in the pelvis (e.g., shape, angle, width).
Explain the functional reasons for these differences (e.g., childbirth).
Try outlining the differences before checking the answer!
