Anatomy B/C Question Marathon

[glitchmaster77]

You got it!
Your turn to ask a question.

[hmath729]

1. Squamous cell carcinoma is characterized by...
2. It causes __% of all skin cancers.
Please remember to hide your answers!!!

[vennowsah]

Answer (Click to Show Hidden Text)

1. Squamous cell carcinoma is the cancer of squamous cells in the stratum spinosum characterized by a firm red nodule, a flat sore w/ scaly crust, or a  rough scaly patch on lip.
2. It causes 20% of all skin cancers.

[hmath729]

That's right, . Your turn!!!

[vennowsah]

1. Explain the symptoms and treatments of Merkel Cell Carcinoma.
2. Describe a nerve impulse (action potential, resting potential, re-polarization, etc.)

[skatakam]

IS IT... (Click to Show Hidden Text)

1. Merkel Cell carcinoma is characterized by rapid, out of control growth of Merkel Cells. The carcinoma itself is characterized by a firm, dome-shaped lump that is red or violet in color. It appears as a single, painless lump on sun-exposed skin. The standard treatment is that of any other cancer treatment: surgery, radiation therapy, or chemotherapy. 2. ?????

My partner and I are doing one system each, so I am not very knowledgeable on the nuances of the nervous system.

[rtunnel97]

1. Explain the symptoms and treatments of Merkel Cell Carcinoma.
2. Describe a nerve impulse (action potential, resting potential, re-polarization, etc.)

to answer the second part of the question, initially the neuron is paralyzed, with a negative charge on the inside and a positive one outside, there are more sodium ions outside the neuron than there are inside the neuron. also inside the neuron there is an abundance of potassium ions. the neuron will remain inactive and polarized, also called resting potential, until a stimulus come along. when a stimulus does come along, the gated ion channels will open, allowing sodium ions to enter the neuron, where there is a lower concentration of sodium, this is known as depolarization. threshold is met when the neuron is depolarizing and this stage of the neuron impulse is known as the action potential. once the neuron reaches it's threshold, there is no turning back. then comes repolarization where the potassium ions travel outside the neuron and the sodium ions stay inside the neuron. this restores the electric balance. now comes hyperpolarization where there are more potassium ions outside the neuron than there are sodium ions inside, creating a potential greater than that of resting potential. finally the neuron returns to resting potential, but there is a refractory period where the potassium returns to the inside of the neuron and the sodium returns to the outside of the neuron. I hope I didn't miss anything there.

[vennowsah]

You both are correct! I guess either one of you can ask.

[glitchmaster77]

or me again!
compare and contrast Broca's and Wernicke's area

[rtunnel97]

Broca's area is located in the frontal lobe where as Wernicke's area is located in the parietal and temporal lobe. Broca's area of the brain is the motor speech area, which means it in movements required to produce speech. Wernicke's area is responsible for for sensory speech, meaning it allows you to understand speech and express your thoughts through speech.