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Re: Anatomy & Physiology B/C

Posted: January 27th, 2015, 4:03 pm
by bernard
Describe each of the layers present in thick skin.

Re: Anatomy & Physiology B/C

Posted: January 28th, 2015, 7:11 pm
by GoofyFoofer
Stratum: Basale, Spinosum, Granulosum, Lucidum (only present in thick skin), and Corneum

Re: Anatomy & Physiology B/C

Posted: January 28th, 2015, 7:24 pm
by bernard
Stratum: Basale, Spinosum, Granulosum, Lucidum (only present in thick skin), and Corneum
Keep going! Notice I said "describe" rather than "list" ;)

Re: Anatomy & Physiology B/C

Posted: January 28th, 2015, 8:02 pm
by GoofyFoofer
Stratum: Basale, Spinosum, Granulosum, Lucidum (only present in thick skin), and Corneum
Keep going! Notice I said "describe" rather than "list" ;)
Oh, sorry.
stratum basale: typically 1-3 cells thick, layer where skin cells grow and divide; also contains melanocytes, Langerhans cells, and Merkel cells
stratum spinosum: composed of layers of polygonal cells that have a spiny appearance (hence its name)
stratum granulosum: thin layer of skin where cells lose their their nuclei and gain hydrophobic qualities
stratum lucidum: thin, clear, layer of dead cells that have flattened, only present in thick skin 
stratum corneum: 15-20 layers of dead cells w/out nuclei nor organelles, serves to protect underlying tissues from              chemicals, dehydration, infection, etc.

Re: Anatomy & Physiology B/C

Posted: January 28th, 2015, 8:14 pm
by bernard
Stratum: Basale, Spinosum, Granulosum, Lucidum (only present in thick skin), and Corneum
Keep going! Notice I said "describe" rather than "list" ;)
Oh, sorry.
stratum basale: typically 1-3 cells thick, layer where skin cells grow and divide; also contains melanocytes, Langerhans cells, and Merkel cells
stratum spinosum: composed of layers of polygonal cells that have a spiny appearance (hence its name)
stratum granulosum: thin layer of skin where cells lose their their nuclei and gain hydrophobic qualities
stratum lucidum: thin, clear, layer of dead cells that have flattened, only present in thick skin 
stratum corneum: 15-20 layers of dead cells w/out nuclei nor organelles, serves to protect underlying tissues from              chemicals, dehydration, infection, etc.
Very good; you had all the key things I was looking for! Your turn!

Re: Anatomy & Physiology B/C

Posted: January 28th, 2015, 10:03 pm
by GoofyFoofer
Alright.
Describe the path a signal takes through the electrical system of the heart.

Re: Anatomy & Physiology B/C

Posted: January 29th, 2015, 3:30 pm
by Eggo
The signal travels as follows: SA Node-->AV Node-->AV Bundle(Bundle of His)--> Left and Right Bundle Branches-->Purkinje Fibers

Re: Anatomy & Physiology B/C

Posted: January 29th, 2015, 8:42 pm
by GoofyFoofer
Correct, Eggo!
Your turn!

Re: Anatomy & Physiology B/C

Posted: February 13th, 2015, 10:30 pm
by Eggo
When an individual is exercising after eating a meal, what role will his pre-capillary sphincters play in giving him cramps?

Re: Anatomy & Physiology B/C

Posted: February 17th, 2015, 9:26 am
by pandora_9999
When an individual is exercising after eating a meal, what role will his pre-capillary sphincters play in giving him cramps?
Pre-cappillary sphincters are bands of smooth muscle that can control the blood flow to a certain area. When one exercises after eating a meal, blood flow to the digestive system decreases to allow more blood flow to the muscles under stress therefore causing cramps in the gut.