NEW
Font size
Worksheets5.2 Controlling Body Temperature
Total questions: 17
Worksheet time: 9mins
What type of feedback is associated with homeostasis?
Negative
Positive
When body temperature is high which of the following is a behavioural response to reduce the amount of heat produced?
Shivering
Put on items of clothing
Eat watermelon :-)
Reduce physical activity
Where are peripheral thermoreceptors located?
In the extremeties
In the mucous membrane and skin
In the skin only
In the hypothalamus
Which nerve fibre delivers the message to arterioles to constrict, in the skin in response to cold environments?
Parasympathetic fibres
Somatic nerve fibres
Sympathetic nerve fibres
Which part of the brain has no role in the coordination of shivering?
Hypothalamus
Corpus Callosum
Cerebellum
What are the temperature receptors of the body?
hypothalamus and motor neurons in the eye
hypothalamus and motor neurons in the skin
hypothalamus and sensory neurons in the eye
hypothalamus and sensory neurons in the skin
What detects external temperature changes via the skin
hypothalamus
motor neurons in the skin
the retina
sensory neurons in the skin
What detects internal temperature changes via the blood?
hypothalamus
motor neurons in the skin
the retina
sensory neurons in the skin
What are two mechanisms for decreasing body temperature?
Shivering and Vasodilation
Sweating and Vasodilation
Shivering and Vasoconstriction
Sweating and Vasoconstriction
When running a marathon which of these would be most useful?
Shivering and Vasodilation
Sweating and Vasodilation
Shivering and Vasoconstriction
Sweating and Vasoconstriction
In very cold weather which of these would be most useful?
Shivering and Vasodilation
Sweating and Vasodilation
Shivering and Vasoconstriction
Sweating and Vasoconstriction
What is Vasodilation?
The widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls. It warms us up.
The widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls. It cools us down.
The narrowing of blood vessels. It results from contraction of smooth muscle cells within the vessel walls. It warms us up.
The narrowing of blood vessels. It results from contraction of smooth muscle cells within the vessel walls. It cools us down.
What is Vasoconstriction?
The widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls. It warms us up.
The widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls. It cools us down.
The narrowing of blood vessels. It results from contraction of smooth muscle cells within the vessel walls. It warms us up.
The narrowing of blood vessels. It results from contraction of smooth muscle cells within the vessel walls. It cools us down.
Why does shivering INCREASE our body temperature
As sweat evaporates heat is lost along with the moisture
Our muscles contract more rapidly producing energy and heat
Our blood flows closer to the surface of the skin so more heat is lost
Our blood flows further away from the surface of the skin so less heat is lost
Why does sweating DECREASE our body temperature
As sweat evaporates heat is lost along with the moisture
Our muscles contract more rapidly producing energy and heat
Our blood flows closer to the surface of the skin so more heat is lost
Our blood flows further away from the surface of the skin so less heat is lost
Why does vasodilation DECREASE our body temperature
As sweat evaporates heat is lost along with the moisture
Our muscles contract more rapidly producing energy and heat
Our blood flows closer to the surface of the skin so more heat is lost
Our blood flows further away from the surface of the skin so less heat is lost
Why does vasoconstriction INCREASE our body temperature
As sweat evaporates heat is lost along with the moisture
Our muscles contract more rapidly producing energy and heat
Our blood flows closer to the surface of the skin so more heat is lost
Our blood flows further away from the surface of the skin so less heat is lost
