BIOS251-EXAM 3(WEEK 6-SKELETAL
SYSTEM) QUESTIONS WITH CORRECT
ANSWERS 2025
major functions of the skeletal system CORRECT ANSWER 1. blood formation
2. support
3. protection
4. movement
5. storage and release of minerals
6. store triglycerides
blood formation CORRECT ANSWER
blood formed in RBM found in epiphysis of long bones, bones of axial skeleton, bones of pelvis
support CORRECT ANSWER provides structural support for the body
- serves as an attachment point for the tendons of skeletal muscles
protection CORRECT ANSWER the skull bones surround & protects the brain
- the vertebral column surrounds & protects the spinal cord
- the vertebrae, ribs, and sternum surround and protect the lungs and heart
- the pelvis partially surrounds and protects the reproductive organs
movement - CORRECT ANSWER -muscles attach to bone via tendons
storage and release of minerals CORRECT ANSWER
bone matrix is made of calcium & phosphorous salts; 99% of the body's calcium is stored in bone in t
he form of these salts
-
most important hormone is Parathyroid Hormone (PTH): secreted by parathyroid glands, function in a
ctivating osteoclasts & will instruct kidneys to retain calcium rather than excreting it
, - other hormone that affect bone density:
~ leptin: secreted by adipose tissue, inhibits osteoblast activity
~ serotonin: produced in the gut, secreted into blood after eating, also inhibits osteoblast activity
store triglycerides CORRECT ANSWER RBM gets replaced w adipocytes
-
these adipocytes function in the storage of lipids, mainly in the form of triglycerides; these lipids can
be used as a chemical and energy reserve
types of cells in bone tissue - CORRECT ANSWER -1. osteogenic cells
2. osteoblasts
3. osteocytes
4. osteoclasts
compact bone - CORRECT ANSWER -consists of:
-
concentric lamellae: matrix is laid out in circular pattern; resembles the pattern of an onion; osteon is
the name of the functional unit of all concentric lamellae
- circumferential lamellae: is matrix that runs in a pattern parallel to the bone surface
- interstitial lamellae: is matrix that fills up the spaces btw the osteons
spongy bone CORRECT ANSWER lighter in density than compact bone
- has an irregular, honeycomb-like appearance
- present during bone development & can be found in the marrow cavities of long bones
- form networks of trabeculae which allow for nutrient diffusion without the use of blood vessels
cartilage CORRECT ANSWER hyaline cartilage
- elastic cartilage
- fibrocartilage
SYSTEM) QUESTIONS WITH CORRECT
ANSWERS 2025
major functions of the skeletal system CORRECT ANSWER 1. blood formation
2. support
3. protection
4. movement
5. storage and release of minerals
6. store triglycerides
blood formation CORRECT ANSWER
blood formed in RBM found in epiphysis of long bones, bones of axial skeleton, bones of pelvis
support CORRECT ANSWER provides structural support for the body
- serves as an attachment point for the tendons of skeletal muscles
protection CORRECT ANSWER the skull bones surround & protects the brain
- the vertebral column surrounds & protects the spinal cord
- the vertebrae, ribs, and sternum surround and protect the lungs and heart
- the pelvis partially surrounds and protects the reproductive organs
movement - CORRECT ANSWER -muscles attach to bone via tendons
storage and release of minerals CORRECT ANSWER
bone matrix is made of calcium & phosphorous salts; 99% of the body's calcium is stored in bone in t
he form of these salts
-
most important hormone is Parathyroid Hormone (PTH): secreted by parathyroid glands, function in a
ctivating osteoclasts & will instruct kidneys to retain calcium rather than excreting it
, - other hormone that affect bone density:
~ leptin: secreted by adipose tissue, inhibits osteoblast activity
~ serotonin: produced in the gut, secreted into blood after eating, also inhibits osteoblast activity
store triglycerides CORRECT ANSWER RBM gets replaced w adipocytes
-
these adipocytes function in the storage of lipids, mainly in the form of triglycerides; these lipids can
be used as a chemical and energy reserve
types of cells in bone tissue - CORRECT ANSWER -1. osteogenic cells
2. osteoblasts
3. osteocytes
4. osteoclasts
compact bone - CORRECT ANSWER -consists of:
-
concentric lamellae: matrix is laid out in circular pattern; resembles the pattern of an onion; osteon is
the name of the functional unit of all concentric lamellae
- circumferential lamellae: is matrix that runs in a pattern parallel to the bone surface
- interstitial lamellae: is matrix that fills up the spaces btw the osteons
spongy bone CORRECT ANSWER lighter in density than compact bone
- has an irregular, honeycomb-like appearance
- present during bone development & can be found in the marrow cavities of long bones
- form networks of trabeculae which allow for nutrient diffusion without the use of blood vessels
cartilage CORRECT ANSWER hyaline cartilage
- elastic cartilage
- fibrocartilage
