MSK anatomy + random Flashcards
Motor unit size is subject to a lot of variation. Small motor units tend to have relatively small cell bodies and fewer axons.
Which is the correct order when ranking muscles according to the size of motor units, largest to smallest?
(1) Quadriceps femoris
(2) semimembranosus
(3) opponens pollicis
(4) superior rectus
A basketball player suffers a severe tear in his Achilles tendon. What will occur at the site of injury?
Fibroblast recruitment for tendon repair
Where does hematopoiesis predominantly occur?
Epiphsis
The diaphysis is the central shaft of the bone and primarily contains what and for what?
yellow bone marrow, serving as a store for fats
What method is responsible for the formation of the skull’s flat bones?
Intranetbranous ossification
What do Volkmann’s canals connect Haversian canals to?
Endostenum
What is the shaft of a long bone called?
Diaphysis
What would an increase in calcitonin lead to?
Decrease osteoclast activity
Growth of long bones originates in what region?
Epiphyseal growth plate
While crossing the street, Paul is hit by a car and suffers an injury to his knee. Upon screening by a doctor, it is determined that he has torn his anterior cruciate ligament. What two structures does this ligament connect?
Femur bone to tibia bone
What connective tissue connects bones to bones?
ligaments
What connects muscles to bone?
tendons
Loss-of-function mutation in the gene that produces what would lead to an increase in blood calcium levels?
Calcitonin
What the cortical bone?
periosteum
What is bone reabsorbing cells?
Osteoclasts
= Break down bone, releasing calcium back into the blood
What diseases decrease blood calcium levels?
Parathyroid hormone or calcitonin
Calcitonin
What is bone forming cells?
Osteoblasts
Cartilage and synovial fluid decomposition and function deteriorate with age and repeated wear and tear. This describes what?
osteoarthritis
Synovial fluid proliferation and inflammation. This describes what?
RA
Deposition of salt crystals eg, uric acid. This describes what?
gouty arthritis
