GAMSAT Practice Questions- Section III
Reasoning in the Biological and Physical Sciences
Questions 1-3 (Allow 5 minutes to complete this section of the mini-exam)
In the human body the speed of blood through the arterial pathway generally decreases with the distance from the heart.
For questions where the acceleration is constant or approximately constant, the following equations may be helpful:-
Where s = distance from origin, u = initial velocity, v = final velocity, a = acceleration, and t = time.
1. The blood flow between the points B and C slowed at a rate of
2. The best of the following estimates of the time that the blood took to travel between points B and C is
A 0.5 secs C 2.5 secs
B 1.5 secs D 3.5 secs
3. Illustrated below are possible velocity vs. time graphs for blood flow. The shaded area is also given. Which of the graphs below most accurately describes the velocity of blood flow through the arterial pathway?
Questions 4-5 (Allow 3 minutes to complete this section of the mini-exam)
A carbon is covalently bonded to 4 different atoms or groups of atoms (designated Red, Green, Blue and Yellow)
4. Which of these structures cannot be superimposed on any of the others?
A I C III
B II D IV
5. Which of the following statements is false?
A I and III are not diastereomers
B I and II are not superimposable
C I and II are chiral enantiomers
D III and IV are enantiomers
Questions 6-8 (Allow 5 minutes to complete this section of the mini-exam)
Growth hormone (GH) is secreted by the anterior pituitary gland in the brain and has actions on a variety of body tissues. The secretion of growth hormone is regulated primarily by the neurosecretory nuclei of the hypothalamus. These cells release the peptides Growth Hormone Releasing Hormone (GHRH) and Growth Hormone Inhibiting Hormone (Somatostatin). GH release is determined primarily by the balance of these two peptides which in turn is affected by many physiological stimulators (e.g. exercise, nutrition, sleep) and inhibitors (e.g. free fatty acids) of GH secretion.
In the figure above:
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The names of structures are circled
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The names of hormones are shown in bold text
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+ denotes a positive or increased effect on production/ response
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- denotes a negative or decreased effect on production/ response
6. Which of the following is a consequence of increased somatostatin production by the hypothalamus?
A Reduced muscle growth
B Increased bone growth
C Increased ghrelin production
D Increased IGF-1 levels
7. Which of the following is affected most directly by negative feedback?
A Liver
B Muscle
C Anterior pituitary
D Adipose tissue
8. Increased fat mass (reduced lipolysis) could be caused by:
A Poor sleep
B High GHRH levels
C High ghrelin levels
D Low somatostatin levels
How did you go?
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