BIOS251/ BIOS 251 Exam 3: Anatomy and Physiology I Guide (Latest 2025/ 2026 Update) | Qs & As| Grade A| 100% Correct (Verified Answers)- Chamberlain

BIOS251/l BIOSl 251l Examl 3:l Anatomyl
andl Physiologyl Il Guidel (Latestl 2025/l
2026l Update)l |l Qsl &l As|l Gradel A|l
100%l Correctl (Verifiedl Answers)-l
Chamberlain

QUESTION
Parathyroidl Hormonel (PTH)


Answer:
l Regulatesl calciuml levels,l activatesl osteoclasts.l Thisl inl turnl instructsl thel kidneysl tol
retainl calciuml ratherl thanl excretingl it




QUESTION
Osteoblasts


Answer:
l Bone-buildingl cellsl derivedl froml osteogenicl cells.




QUESTION
Osteocytes


Answer:
l Createdl froml osteoblastsl andl functionl inl bonel maintenance




QUESTION

,Osteoclasts


Answer:
l Cellsl responsiblel forl bonel breakdownl andl reabsorption.




QUESTION
Bloodl formation


Answer:
l Bloodl formedl inl redl bonel marrowl foundl inl epiphysisl ofl longl bones,l bonesl ofl axiall
skeleton,l bonesl ofl pelvis




QUESTION
Support


Answer:
l -l Providesl structurall supportl forl thel body.
-l Servesl asl anl attachmentl pointl forl thel tendonsl ofl skeletall muscles




QUESTION
Movement


Answer:
l Musclesl attachl tol bonesl vial tendons.




QUESTION
Minerall storage

,Answer:
l Bonesl storel calciuml andl phosphorusl salts.




QUESTION
Compactl bone


Answer:
l Concentricl lamellael -l matrixl isl laidl outl inl al circularl patternl aroundl al centrall
(Haversian)l canal.l Thisl typel ofl lamellal resemblesl thel patternl ofl anl onion.l Osteonl isl
thel namel ofl thel functionall unitl ofl alll ofl thel concentricl lamellael thatl surroundsl al singlel
centrall canal.

Circumferentiall lamellael -l isl matrixl thatl runsl inl al patternl parallell tol thel bonel surface.

Interstitiall lamellael -l isl matrixl thatl fillsl upl thel spacesl betweenl thel osteons.




QUESTION
Spongyl bone


Answer:
l -l lighterl inl densityl thanl compactl bone
-l hasl anl irregular,l honeycomb-likel appearance
-l presentl duringl bonel developmentl andl canl bel foundl inl thel marrowl cavitiesl ofl longl
bones
-l forml networksl ofl trabeculael whichl allowl forl nutrientl diffusionl withoutl thel usel ofl
bloodl vessels.




QUESTION
Elasticl cartilage


Answer:
l Foundl inl earl andl epiglottis,l flexible.l Similarl tol hyalinel cartilage,l butl withl morel elasticl
fibersl inl thel matrix.

, QUESTION
Fibrocartilage


Answer:
l locatedl inl bodyl regionsl thatl requirel strongl supportl andl thel abilityl tol withstandl
pressurel (specificallyl inl thel knee,l pubicl synthesis,l andl spine).l Thisl typel ofl cartilagel
obtainsl itsl morel rigidl characteristicsl froml rowsl ofl chondrocytesl alternatingl withl thickl
collagenl fibersl inl thel matrix.




QUESTION
Longl bone


Answer:
l Bonel longerl thanl itl isl wide,l e.g.,l femur.




QUESTION
Flatl bone


Answer:
l Bonel widerl thanl itl isl long,l e.g.,l sternum.




QUESTION
Shortl bone


Answer:
l Bonel equall inl lengthl andl width,l e.g.,l carpal.