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
