Biology Hormonal Communication Exam Questions And Correctly Well Defined Answers.
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Course
HORMONES
Institution
HORMONES
The following terms relate to the metabolism of carbohydrates in the human body:
1 gluconeogenesis
2 glycogenesis
3 glycolysis
Which of these processes will be stimulated when glucagon is released into the bloodstream? - correct answer 1 gluconeogenesis
Studies on the effects of hCG in ...
The following terms relate to the metabolism of carbohydrates in the human body:
1 gluconeogenesis
2 glycogenesis
3 glycolysis
Which of these processes will be stimulated when glucagon is released into the bloodstream? - correct
answer 1 gluconeogenesis
Studies on the effects of hCG in humans have revealed the following information:
Many different tissues are affected by hCG.
Susceptible cells have glycoprotein receptors on their cell surface.
These receptors are complementary to the shape of hCG molecules.
What can be concluded from this information? - correct answer (hCG is a) peptide hormone / hCG is
not a
lipid-based hormone (1)
(hCG) binds to cell surface receptor (1)
idea that cell signalling is involved in action
of hCG (1)
(hCG) uses cAMP / second messenger, to
bring about response in cell (1)
Another hormone produced during pregnancy is oestrogen. Oestrogen is lipid soluble. Which molecule
does oestrogen interact with when it changes cell activity? - correct answer DNA
A hydatidiform mole is a rare complication of pregnancy that can occur after implantation of the
fertilised egg in
, the uterus. It results in excessive production of hCG and damage to the lining of the womb, leading to
miscarriage.
Suggest how a hydatidiform mole could increase hCG above normal levels. - correct answer idea that
(hydatidiform mole) cells produce
more hCG than normal (1)
(due to) expression / up regulation, of
genes (1)
synthesising more, hCG / protein(s) (1)
idea that other tissues could be stimulated
to produce more hCG than normal (1)
Growth hormone (GH) is a peptide hormone that stimulates cell reproduction and regeneration in
humans and
other animals. It is produced during development to increase muscle mass and increase bone size and
density.
GH can also be used in farming to enhance yields from different animals.
Design an experiment to investigate the following hypothesis:
"Varying the concentration of GH injected affects the yield of meat from farmed
chickens"
You must explain how you would obtain valid data. - correct answer Independent variable -
concentration
of GH injected
Dependent variable - rate of growth
Control variables - animal species,
foodstuff, (named) conditions
Trial populations over several months
Control group to ensure validity of
conclusions
Method for assessing growth - e.g. %
mass change or growth rate to allow
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