Anatomy & Physiology B/C

[watermydoing14]

Answer (Click to Show Hidden Text)

This is due to rigor mortis, the stiffening of limbs after death due to chemical changes in the muscles. After death ATP cannot be produced, and ATP is needed for the separation of cross-bridges between actin and myosin when the muscles relax. These cross-bridges must be degraded by enzymes during decomposition. The hand will not always be holding the vial because those enzymes during decomposition will degrade the cross-bridges, allowing the myosin and actin to separate and the muscle to relax.

[Fluorine]

Yep you got it. Your turn

[watermydoing14]

What layer of the skin are Merkel cells found in? What is the structure and function of Merkel cells?

[Fluorine]

What layer of the skin are Merkel cells found in? What is the structure and function of Merkel cells?

Here you go! (Click to Show Hidden Text)

Epidermis; stratum basale (I think)?
Merkel Cells function as light touch receptors and structured in an oval shape

[watermydoing14]

Correct! Your turn!

[Fluorine]

Let's talk about Bob

Bob begins "pumping iron" three times a week at his local gym. After several months Bob's muscles are substantially larger. Why does this occur?

[sciolylover13]

Let's talk about Bob

Bob begins "pumping iron" three times a week at his local gym. After several months Bob's muscles are substantially larger. Why does this occur?

Answer (Click to Show Hidden Text)

When you exercise, your muscles are "damaged". This disrupts muscle cell organelles which causes satellite cells to activate and proliferate to the injury site.  A biological effort to replace damaged muscle fibers begins. The satellite cells fuse together and to the muscles fibers, often leading to increases in  muscle hypertrophy. The satellite cells have only one nucleus and can replicate by dividing. As the satellite cells multiply, some remain as organelles on the muscle fiber where as the majority differentiate and fuse to muscle fibers to form new myofibrils and/or repair damaged fibers. The muscle cells’ myofibrils will increase in thickness and number. 

Source(s): http://www.unm.edu/~lkravitz/Article%20folder/musclesgrowLK.html

[Fluorine]

Let's talk about Bob

Bob begins "pumping iron" three times a week at his local gym. After several months Bob's muscles are substantially larger. Why does this occur?

Answer (Click to Show Hidden Text)

When you exercise, your muscles are "damaged". This disrupts muscle cell organelles which causes satellite cells to activate and proliferate to the injury site.  A biological effort to replace damaged muscle fibers begins. The satellite cells fuse together and to the muscles fibers, often leading to increases in  muscle hypertrophy. The satellite cells have only one nucleus and can replicate by dividing. As the satellite cells multiply, some remain as organelles on the muscle fiber where as the majority differentiate and fuse to muscle fibers to form new myofibrils and/or repair damaged fibers. The muscle cells’ myofibrils will increase in thickness and number. 

Source(s): http://www.unm.edu/~lkravitz/Article%20folder/musclesgrowLK.html

Yea you got it. Sorry for the super conceptual questions but someone has got to ask haha

[sciolylover13]

1. Describe the function of Volkmann's canals.
2. Give a description and the prevention, treatment, and risk factors for scoliosis.

[Anu_vb]

1. Volkmann canals are channels lying at right angles to the Harvesian or central canal, connecting blood and nerve supply of periosteum to the Haversian canal.
2. Scoliosis is a lateral curvature of the vertebral column. In extreme cases, there may be compression of some of the internal organs, scoliosis occurs in the rapid growth period of the teens, more often in girls than in boys. Early identification and treatment produce good results. Three proven treatments for scoliosis-observation, bracing, and surgery. These depend on the severity of scoliosis and physical maturity of the child.