SCSA Human Biology Homeostasis
5 sample questions with marking guides and sample answers · Avg. score: 62.5%
Type 2 diabetes is a condition whereby a person can
produce glucagon but their cells do not respond to it.
produce insulin but their cells do not respond to it.
no longer produce insulin.
no longer produce glucagon.
Respiratory acidosis is a disorder whereby the acidity of the blood is high. High acidity of the blood is caused by
a decrease in carbon dioxide levels, which leads to a decrease in hydrogen ion concentration.
an increase in carbon dioxide levels, which leads to an increase in hydrogen ion concentration.
an increase in carbon dioxide levels, which leads to a decrease in hydrogen ion concentration.
a decrease in carbon dioxide levels, which leads to an increase in hydrogen ion concentration.
During the 2024 Olympic Games in Paris, the cleanliness of the River Seine was of concern. High levels of the bacteria Escherichia coli (E. coli) were detected in the river, presenting potential health risks for the athletes competing in the triathlon and open-water swimming events. Several athletes were treated for E. coli infections.
Contrast three features of bacteria and viruses.
In addition to severe nausea, the unwell swimmers started feeling cold, shivering uncontrollably and were asking for blankets, despite the outside temperatures being warm.
Name and outline the physiological responses the swimmers' bodies were having to the infection.
After swimming in the River Seine, Australian athletes were prescribed antibiotics to prevent an E. coli infection.
Antibiotics can be classified into two groups based on their mode of action. Name these two groups and outline how they fight bacterial infections.
Homeostatic processes involve both nerves and hormones in the maintenance of many bodily functions, such as blood glucose levels.
Define homeostasis and describe how a negative feedback model contributes to the maintenance of bodily functions.
Explain the role the adrenal glands play in maintaining blood glucose levels.
During a trip to the Australian bush, a young man was lost for over six hours. The day on which he was lost was particularly hot, with temperatures peaking at 42 °C. After a day's rest, the young man recovered from his experience with no lasting ill-effects.
Describe the physiological mechanisms that would have been operating to maintain his internal body temperature during the six hours he was lost in the bush.
Explain how the mechanisms required to maintain homeostasis of the man's internal body temperature would have also triggered the homeostatic processes involved in the maintenance of his body fluid concentration.