Group essay topics

Question 1

Question based on the essential steps of the Excitation Contraction Coupling process

Answer 1

watch video!

Question 2

The importance of PTH in the regulation of calcium homeostasis.

Answer 2

Question 3

Bone “remodeling” and the adaptation of bone to mechanical loading (or lack of mechanical loading).

Answer 3

During development and fracture repair, converts woven bone into lamellar bone
Caused by migration of Basic Multicellular Units
Groups of osteoclasts and osteoblasts that remodel bones
Involved in bone growth, changes in bone shape, adjustments in bone due to stress, bone repair, and Ca2+ ion regulation
Relative thickness of bone changes as bone grows. Bone constantly removed by osteoclasts and new bone formed by osteoblasts.
Formation of new osteons in compact bone
Osteoclasts enter the osteon from blood in the central canal and internally remove lamellae. Osteoblasts replace bone
Osteoclasts remove bone from the exterior and the bone is rebuilt

Question 4

How are cells in the articular cartilage (chondrocytes) nurtured in synovial joints?

Answer 4

As synovial joints move, interstitial fluid in articular cartilage is forced out (cartilage compressed) and taken in (cartilage relaxed) over and over again. In this process, O2, CO2, glucose, waste, and other small molecules move in and out of the cartilage (pores in the nm range prevent larger molecules to cross between cartilage and synovial fluid).