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The Skeletal System all questions solved 100 accurately latest version
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The Skeletal SystemSkeletal system-✔✔ Interconnected system of bones ligaments and
tendons
Provide support and protection for body
Composed of 206 bones
Support-✔✔ provides solid axis for muscles to act against, creating
motion.
Protection-✔✔ bones such as skull provide barrier of protection from
external forces
Hematopoiesis-✔✔ production of red blood cells
Long, Short, Flat, Irregular, and Sesamoid-✔✔ 5 classes of bones
Long bones-✔✔ Found in the limbs. Each bone is made of a body
(diaphysis) and two extremities (epiphyses). Wall consists of dense tissue.
Central canal called medullary canal is filled with marrow.
Short bones-✔✔ Found in skeleton where strength, compactness, and
limited movement are desired 2 main examples are Tarsus and Carpus
Flat bones-✔✔ Used in spots where protection or muscular attachment is
desired. Main locations are skull and scapula.
Irregular bones-✔✔ Bones which don’t fit into other categories due to
irregular shapes Examples: vertebrae, sphenoid, and hyoid
Sesamoid bones-✔✔ Usually small and round. Embedded within tendons
adjacent to joints. Example: patella (knee cap)
, Fetal skeleton-✔✔ Begins as mainly cartilage Calcifies in utero At birth,
fontanels remain
Ossification-✔✔ Bone production process gives bone extreme tensile and
compressional strength. Several things contribute to strength.
Physical Exercise, Exposure to sunlight, Hormonal Secretion, and
Nutrition-✔✔ Factors which contribute to bone growth
Nutrition-✔✔ Mainly calcium consumption
calcitonin-✔✔ Increased blood calcium triggers release of ____
osteoblasts-✔✔ bone builders constantly producing new bone tissue
parathyroid hormone-✔✔ Decrease in calcium triggers release of _____
that triggers osteoclasts to break down bone, releasing calcium into blood
Vitamin D-✔✔ UV light on the skin causes ___________ production which
promotes proper absorption of calcium in the Small Intestine (SI)
strength-✔✔ In physical activity, the increase in physical exertion on bone
tissue actually increases bone density and _________
Somatotropin or HGH-✔✔ In hormonal excretion, ________ is secreted by
the anterior lobe of the pituitary gland. It stimulates the growth of essentially
all tissues of the body, including bone. Both hormones stimulate activity in
the epiphyseal plate.
osteoclasts-✔✔ clean out old bone tissue and causes holes or tunnels in
bone which osteoblasts then fill in with calcium and phosphate compounds
Simple fracture-✔✔ Also called closed fracture
Bone breaks cleanly and does not penetrate skin.
Little chance of infection
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