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WorksheetsChapter Test [Homeostasis]
Total questions: 16
Worksheet time: 4hrs 0mins
Which of the following best explains the importance of homeostasis?
It is important to detect changes in the normal conditions of the internal environment.
It is important to bring about the appropriate corrective response mechanism to reverse the changes in the normal conditions of the internal environment.
It is important to maintain a stable internal environment to allow the body function optimally.
It is important to signal to the receptor that the normal conditions of the internal environment have been restored through negative feedback.
The following show the different components involved in homeostasis.
1) Receptor
2) Negative Feedback
3) Stimulus
4) Regulatory (Corrective) Mechanism
Which of the following correctly lists the order that the different components are involved in homeostasis?
1 --> 3 --> 4 --> 2
1 --> 3 --> 2 --> 4
3 --> 1 --> 2 --> 4
3 --> 1 --> 4 --> 2
Which of the following is not a function of skin?
Absorption
Excretion
Protection
Regulation of body temperature
Which of the following states the sources from where we gain heat?
1) Metabolic activities
2) Exhalation
3) Internal environment
4) External environment
1 and 2 only
1 and 3 only
1, 2 and 3 only
1, 3 and 4 only
Which of the following states the activities by which the skin allows heat loss?
1) Conduction
2) Convection
3) Radiation
4) Evaporation of sweat
1 and 2 only
1, 2 and 3 only
1, 2 and 4 only
1, 2, 3 and 4
Which of the following is true about shunt vessels when there is an increase in body temperature?
A
B
C
D
Study the diagrams. Which of the following best classifies the activity that takes place in the body?
Receptor
Negative Feedback
Stimulus
Regulatory (Corrective) Mechanism
The graph shows changes in a person's body temperature plotted against time.
What causes the change in temperature between X and Y?
Increased air temperature
Increased evaporation of sweat
Reduced blood flow through surface capillaries
Shivering
What happens to the arterioles near the surface of the skin when the body temperature rises?
They absorb oxygen from the surrounding tissues.
They dilate and become wider.
They move nearer the skin surface.
They take in water from the surrounding tissues.
Which combination of factors helps prevent the loss of heat from the body?
A
B
C
D
On a hot day, how would these skin structures respond to help maintain a constant body temperature?
A
B
C
D
A person walks into a very cold room. Shortly afterwards, the hairs on the skin are raised. Which labelled structure is included in the first stage of this reflex?
A
B
C
D
The circles represent the diameter of the blood vessels in the surface of the skin as the body temperature changes.
Which shows the diameter of the blood vessels after a decrease and after an increase in body temperature?
A
B
C
D
The body can regulate both its temperature and the amount of water in its cells. What are these processes?
Assimilation
Excretion
Homeostasis
Osmosis
When the external temperature drops, the following changes may take place in the human body.
1) Body temperature falls
2) Body temperature rises
3) Brain detects cooler blood
4) Shivering begins
In which order do they occur (from first to last)?
1 --> 3 --> 4 --> 2
1 --> 4 --> 3 --> 2
3 --> 2 --> 4 --> 1
3 --> 4 --> 2 --> 1
The diagram shows a section through the skin. Which structure detects changes in skin temperature?
A
B
C
D
