Biochemical Endocrinology Question Paper

Biochemical Endocrinology

Course:Bachelor Of Science

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR
OF SCIENCE (BIOCHEMISTRY AND BIOTECHNOLOGY)
SBC 400:
BIOCHEMICAL ENDOCRINOLOGY
==============================================================
DATE: MONDAY 21ST DECEMBER 2009 TIME: 8.00 A.M. – 10.00 A.M.

INSTRUCTIONS

Section A:
Answer TWO Questions.

1.
Using structures, describe the biosynthesis, secretion and regulation of insulin.

2.
a)
Explain the structure and function of hormone receptors and their
properties.
(10
marks)
b)
Distinguish
between
hydrophobic
and hydrophilic hormones.(5 marks)

c)
Illustrate the hormonal regulation of blood glucose.
(5 marks)

3.
a)
Discuss the role of the hormone cortisol in carbohydrate metabolism.

(10 marks)
b) Describe
the
rennim-angiotensin system that stimulates the synthesis of
aldosterone.
(5
marks)
c)
What is the role of Calcium ions in the regulation of parathyroid hormone
secretion?

(5 marks)
Section B:
Answer ALL Questions
4.
a)
Why is Vitamin D considered to be a hormone?

(4 marks)

b)
Describe the activation of Vitamin D3.

(6 marks)
5.
a)
Explain how phophodiesterase inhibits the cyclic adenylase after an
emergency.
(6
marks)

b)
Why is coffee an effective stimulant.

(4 marks)

6.
Discuss the principle of the second messenger concept.
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