radioactiveviolet wrote:Kudos to the explanation from sciolyFTW_aku, and I hope this one's a bit easier
A woman comes into the E.R. with severe burns in the epidermis and extending into the dermis, characterized by swelling and blistering of the skin that was burned. The anterior side of her left leg and left arm were affected. (a) What degree burns does this woman have? (b) What percentage of her body is burnt?
Integ...
a) 2nd degree burns, due to the presence of blisters
b) 18% (whole leg is 18%, so front side would be half of that (9%), and either arm accounts for 9%, adding both (9%+9%) gives us 18%)
EDIT: Welcome to the SciOly Forums, radioactiveviolet!
Anyways, here's all you need to know about excitation-contraction coupling. So kids, start taking notes
Excitation-contraction coupling is the process in which a motor neuron conducts action potentials that travel to hundreds of skeletal fibers within muscles. In skeletal muscles, the coupling relies on two key proteins: the SR calcium release channel (the ryanodine receptor, RyR), and voltage-gated L-type channels (dihydropyridine receptors, DHPRs). This process occurs in the triad: a transverse tubule and two SR regions, which contain RyRs. These are the steps:
1) membrane potential of muscle cell depolarized by action potential
2) depolarization activates DHPRs
3) activates RyR (type 1)
4) as RyRs open, Ca (calcium) is released from SR in local space, which diffuses into cytoplasm. This causes a "cytoplasm spark".
5) The activation of 1000s of Ca spark at nearly the same time causes cell-wide increase in calcium, givs rise to upstroke of Ca transient
6) calcium released into cytosol binds to Troponin C (troponin has 3 subunits: T, I, C) by actin filaments, allowing cross-bridge cycling (last phase in muscular contraction)
7) the SERCA pumps Ca back into SR
8) as Ca declines to resting levels, relaxation occurs
source: https://en.wikipedia.org/wiki/Muscle_contraction#Excitation-contraction_coupling_in_skeletal_muscles
radioactiveviolet wrote:Kudos to the explanation from sciolyFTW_aku, and I hope this one's a bit easier
A woman comes into the E.R. with severe burns in the epidermis and extending into the dermis, characterized by swelling and blistering of the skin that was burned. The anterior side of her left leg and left arm were affected. (a) What degree burns does this woman have? (b) What percentage of her body is burnt?
Integ...
a) 2nd degree burns, due to the presence of blisters
b) 18% (whole leg is 18%, so front side would be half of that (9%), and either arm accounts for 9%, adding both (9%+9%) gives us 18%)
EDIT: Welcome to the SciOly Forums, radioactiveviolet!
radioactiveviolet wrote:Kudos to the explanation from sciolyFTW_aku, and I hope this one's a bit easier
A woman comes into the E.R. with severe burns in the epidermis and extending into the dermis, characterized by swelling and blistering of the skin that was burned. The anterior side of her left leg and left arm were affected. (a) What degree burns does this woman have? (b) What percentage of her body is burnt?
Integ...
a) 2nd degree burns, due to the presence of blisters
b) 18% (whole leg is 18%, so front side would be half of that (9%), and either arm accounts for 9%, adding both (9%+9%) gives us 18%)
EDIT: Welcome to the SciOly Forums, radioactiveviolet!
Correct! (and thanks, glad to be here!)
Oh hey, a Georgian! You should come over to the state thread and be active!
What is a hallux valgus? How does it form, and what are the causes? What are some treatments for treating this condition?
It is a big toe bunion, usually formed when the hallux (big toe) moves proximally towards the other toes, and pushes on the metatarsal bones. Some treatments could be to get it surgically repaired or to take anti-inflammatory drugs to reduce the swelling.
Last edited by radioactiveviolet on March 13th, 2016, 7:44 pm, edited 1 time in total.
What is a hallux valgus? How does it form, and what are the causes? What are some treatments for treating this condition?
It is a big toe bunion, usually formed when the hallux (big toe) moves proximally towards the other toes, and pushes on the metatarsal bones. Some treatments could be to get it surgically repaired or to take anti-inflammatory drugs to reduce the swelling.
What is a hallux valgus? How does it form, and what are the causes? What are some treatments for treating this condition?
It is a big toe bunion, usually formed when the hallux (big toe) moves proximally towards the other toes, and pushes on the metatarsal bones. Some treatments could be to get it surgically repaired or to take anti-inflammatory drugs to reduce the swelling.
Correct! Your turn!
What is a prime mover muscle used in closing the mouth, but mainly known for chewing?
Also, thanks for editing the "hide" thing, I forget sometimes.
A woman comes into the E.R. with severe burns in the epidermis and extending into the dermis, characterized by swelling and blistering of the skin that was burned. The anterior side of her left leg and left arm were affected. (a) What degree burns does this woman have? (b) What percentage of her body is burnt?
