Step-by-Step Guidance for Skeletal System Pre-Lecture and Concept Check Questions

Q1. Which of the below is NOT a major function of the skeletal system?

Background

Topic: Skeletal System Functions

This question tests your understanding of the primary roles of the skeletal system in the human body.

Key Terms:

• Support: The skeleton provides structural support for the body.

• Blood cell production: The process of hematopoiesis occurs in bone marrow.

• Leverage: Bones act as levers for muscle action.

• Storage: Bones store minerals (like calcium and phosphate) and, to a lesser extent, lipids in yellow marrow.

Step-by-Step Guidance

1. Review the main functions of the skeletal system: support, protection, movement (leverage), mineral storage, and blood cell production.

2. Consider which of the listed options does not fit with these primary functions.

3. Recall that while bones store minerals and some lipids, they do not store sugars as a major function.

4. Eliminate the options that are clearly major functions, and focus on the one that is not.

Try solving on your own before revealing the answer!

Q2. What is the proper term for the central shaft of a bone?

Background

Topic: Bone Structure

This question tests your knowledge of the anatomical terminology for parts of a long bone.

Key Terms:

• Diaphysis: The shaft or central part of a long bone.

• Epiphysis: The end part of a long bone, initially growing separately from the shaft.

• Marrow cavity: The central cavity of bone shafts where marrow is stored.

Step-by-Step Guidance

1. Recall the structure of a typical long bone: diaphysis (shaft), epiphyses (ends), and marrow cavity (inside the shaft).

2. Match each term to its definition and location in the bone.

3. Identify which term specifically refers to the central shaft.

Try solving on your own before revealing the answer!

Q3. Which compound accounts for 2/3 the weight of bone?

Background

Topic: Bone Composition

This question tests your understanding of the chemical makeup of bone tissue.

Key Terms:

• Calcium phosphate: The main mineral component of bone, providing hardness and strength.

• Other compounds: Consider if sodium hypochlorite, copper sulphate, or carbon dioxide are significant in bone structure.

Step-by-Step Guidance

1. Recall that bone is composed of both organic (collagen) and inorganic (mineral) components.

2. Identify which mineral makes up the majority of the bone's weight.

3. Eliminate options that are not typically found in bone tissue.

Try solving on your own before revealing the answer!

Q4. Which of the following means ‘the enlargement of a bone’s diameter’? This process occurs as the bone lengthens.

Background

Topic: Bone Growth

This question tests your understanding of the terminology related to bone growth, specifically how bones increase in diameter.

Key Terms:

• Ossification: The process of bone tissue formation.

• Calcification: The deposition of calcium salts within tissues.

• Appositional growth: Growth in the diameter or thickness of bones.

Step-by-Step Guidance

1. Review the definitions of ossification, calcification, and appositional growth.

2. Determine which term specifically refers to the increase in bone diameter.

3. Recall that this process occurs alongside bone lengthening during development.

Try solving on your own before revealing the answer!

Q5. Approximately how much of the total calcium in the human body is contained in the skeleton?

Background

Topic: Mineral Storage in Bones

This question tests your knowledge of the role of bones in storing minerals, particularly calcium.

Key Terms:

• Calcium storage: Bones act as a reservoir for calcium, which is essential for many physiological processes.

Step-by-Step Guidance

1. Recall the percentage of calcium stored in bones compared to the total body calcium.

2. Consider the importance of bone as a mineral reservoir.

3. Eliminate options that are too low or not consistent with the major storage role of bone.

Try solving on your own before revealing the answer!

Q6. Choose the correct combination of function and shape for the parietal skull bone.

Background

Topic: Bone Classification and Function

This question tests your understanding of bone shapes and their associated functions, specifically for the parietal bone of the skull.

Key Terms:

• Flat bones: Bones that are thin and provide protection, such as those in the skull.

• Long bones: Bones that are longer than they are wide, primarily for movement.

Step-by-Step Guidance

1. Recall the shape and function of the parietal bone in the skull.

2. Match the correct function (protection or movement) with the correct bone shape (flat or long).

3. Eliminate combinations that do not fit the anatomical role of the parietal bone.

Try solving on your own before revealing the answer!

Q7. Which combination of cell/structure and function below is INCORRECT?

Background

Topic: Bone Cells and Structures

This question tests your knowledge of the functions of different bone cells and structures.

Key Terms:

• Osteoblast: Cells that build new bone matrix.

• Osteoclast: Cells that break down bone matrix and release minerals.

• Perforating canal: Canals that connect central canals of osteons.

• Canaliculi: Small channels connecting lacunae, allowing communication between osteocytes.

Step-by-Step Guidance

1. Review the function of each cell type and structure listed.

2. Identify which function does not match the cell or structure.

3. Eliminate the correct combinations to find the incorrect one.

Try solving on your own before revealing the answer!

Q8. A male pelvis will typically have a ________ pubic arch and a ________ distance between the ischia.

Background

Topic: Skeletal Differences Between Sexes

This question tests your understanding of anatomical differences between male and female pelvises.

Key Terms:

• Pubic arch: The angle formed below the pubic symphysis.

• Ischia: The lower, posterior portions of the pelvis.

Step-by-Step Guidance

1. Recall the typical characteristics of a male pelvis compared to a female pelvis.

2. Consider the shape and width of the pubic arch and the distance between the ischia in males.

3. Match the correct descriptors (narrower/wider, smaller/larger) to the male pelvis.

Try solving on your own before revealing the answer!

Q9. Which of the below joints are capable of free movement?

Background

Topic: Joint Classification

This question tests your knowledge of the types of joints and their range of movement.

Key Terms:

• Synarthroses: Immovable joints.

• Amphiarthroses: Slightly movable joints.

• Diarthroses: Freely movable joints (also known as synovial joints).

Step-by-Step Guidance

1. Review the definitions of synarthroses, amphiarthroses, and diarthroses.

2. Identify which type allows for free movement.

3. Eliminate the options that do not fit this description.

Try solving on your own before revealing the answer!

Q10. Moving one’s arm away from the center of the body, as depicted by ‘A’, would be considered ________, whereas moving it back towards the center of the body, as depicted by ‘B,’ would be considered _________.

Background

Topic: Anatomical Movements

This question tests your understanding of the terminology for limb movements relative to the midline of the body.

Key Terms:

• Abduction: Movement away from the midline of the body.

• Adduction: Movement toward the midline of the body.

• Lateral/Medial rotation: Rotational movements around the limb's axis.

Step-by-Step Guidance

1. Recall the definitions of abduction and adduction, as well as lateral and medial rotation.

2. Visualize or mimic the described movements to determine which term applies to each direction.

3. Match the correct terms to the movements described in the question.

Try solving on your own before revealing the answer!