biochem/physiology Questions...

[docnc]

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1. Each of the following polymer is correctly paired with its component precursor except one.which one is the exception.
polymer component

a. Dextran Sucrose
b. Glycogen Fructose
c. Mutan Sucrose
d. Glycogen UDP-glucose
e. Levan Sucrose


2.Atropine prevents the secretion of saliva resulting from stimulation of the chorda tympani because it????


3.Which of the following organs secretes insulin like growth factor 1 (IGF-1) & what stimulates this secretion?
a. ant pituitary , increasing IGF-RH in the blood.
b. ant pituitary ,increasing GRH in the blood.
c. kidney , increasing GH in the blood
d. liver , increasing GH in the blood
e. liver , increasing TSH in the blood.


4.An analysis of an EKG shows P-waves occurring in the S-T segment.This would indicate etopic beats originating in the
a. atria
b. A-V node
c. lower portion of the bundle of His
d. upp portion of the bundle of His

 

[vijaggi]

1. Each of the following polymer is correctly paired with its component precursor except one.which one is the exception.
polymer component

a. Dextran Sucrose
b. Glycogen Fructose.
c. Mutan Sucrose
d. Glycogen UDP-glucose
e. Levan Sucrose


2.Atropine prevents the secretion of saliva resulting from stimulation of the chorda tympani because it????


3.Which of the following organs secretes insulin like growth factor 1 (IGF-1) & what stimulates this secretion?
a. ant pituitary , increasing IGF-RH in the blood.
b. ant pituitary ,increasing GRH in the blood.
c. kidney , increasing GH in the blood
d. liver , increasing GH in the blood
e. liver , increasing TSH in the blood.


4.An analysis of an EKG shows P-waves occurring in the S-T segment.This would indicate etopic beats originating in the
a. atria
b. A-V node
c. lower portion of the bundle of His
d. upp portion of the bundle of His

acc to me.correct me if m wrong
1 b is the ans
3 i know liver secretes insulin like growth factor but not sure whether d r e is the ans
4 c is the ans

 

[vijaggi]

acc to me.correct me if m wrong
1 b is the ans
3 i know liver secretes insulin like growth factor so ans is d.
4 c is the ans

wikipedia says
The IGF "axis" is also commonly referred to as the Growth Hormone/IGF1 Axis. Insulin-like growth factor 1 (IGF-1) is mainly secreted by the liver as a result of stimulation by growth hormone (GH). IGF-1 is important for both the regulation of normal physiology, as well as a number of pathological states, including cancer. The IGF axis has been shown to play roles in the promotion of cell proliferation and the inhibition of cell death (apoptosis). Insulin-like growth factor 2 (IGF-2) is thought to be a primary growth factor required for early development while IGF-I expression is required for achieving maximal growth. Gene knockout studies in mice have confirmed this, though other animals are likely to regulate the expression of these genes in distinct ways. While IGF-2 may be primarily fetal in action it is also essential for development and function of organs such as the brain, liver and kidney.

 

[drknali]

chorda tympani is a branch of facial gives secretomotar fibres to the submandibular and sublingual gland
atropine blocks this

 

[docnc]

thanks vijaggi & drknali for your prompt reply....according to me ans for 3 will Liver ,increasing GH in the blood....correct me if i am wrong....