bioQ quickones

[utdent20]

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1what does calcium bind to start contractions in a muscle?? troponin or tropomyosin..
2.what is responsible for increasing glucose concentration?? glucagon?
3. In a emergency situation(sympathetic NS) uses _______??? Epinephrine right?

 

[tranv117]

what does calcium bind to start contractions in a muscle?? troponin or tropomyosin..
2.what is responsible for increasing glucose concentration?? glucagon?

1. calcium binds troponin protein located on tropomyosin.

2. glucagon will increase blood glucose concentration

 

[utdent20]

glucagon increases blood glucose, what about, cortisol(acc to destroyer) cortisol and epinephrine will do the same.. do you agree?

 

[tranv117]

cortisol will increase gluconeogeneis and glycogen breakdown. So in a sense, it will increase blood glucose

 

[tranv117]

not sure what you mean by emergency for question number 3. Yes, sympathetic nervous system is part of the autonomic "fight of flight" NS. In the sympathetic NS, there is a pre and postganglionic nerve fiber. The preganglionic fiber secretes ACh neurotransmitter while the post ganglionic fiber will secrete norepinephrine to the proper effector muscles, ie. heart.

 

[utdent20]

wow that was a good detailed explanation...thank you!

 

[keliao]

not sure what you mean by emergency for question number 3. Yes, sympathetic nervous system is part of the autonomic "fight of flight" NS. In the sympathetic NS, there is a pre and postganglionic nerve fiber. The preganglionic fiber secretes ACh neurotransmitter while the post ganglionic fiber will secrete norepinephrine to the proper effector muscles, ie. heart.

mmmmmmm..... i thought
sympathethic (fight or flight) - post ganglonic
parasympa (Acetylcholine)- pre ganglionic neuron

 

[tranv117]

mmmmmmm..... i thought
sympathethic (fight or flight) - post ganglonic
parasympa (Acetylcholine)- pre ganglionic neuron

In both systems, there is a post and preganglionic nerve fiber. PNS only uses ACh neurotransmitter while SNS uses both ACh and norepinephrine

 

[IWantSmile]

In both systems, there is a post and preganglionic nerve fiber. PNS only uses ACh neurotransmitter while SNS uses both ACh and norepinephrine

You must really good at Human physio. 🙂 I always confused at that subject. I will ask you when it comes up.

 

[tranv117]

You must really good at Human physio. 🙂 I always confused at that subject. I will ask you when it comes up.

i only wish i was half as good as some people here on SDN. hah, I highly recommend MCAT review material for the sciences, I found that it helps much more on the conceptual understanding stuff then any other DAT prep stuff I've seen/used so far.