Biology
The figures A and B given below represent the ways of heat regulation in our body with the help of blood vessels. Study the figures and answer the following questions.
(a) Name the process/condition shown in figures A and B.
(b) During what climatic conditions, do these processes occur in our body?
(c) What colour change do we see in the facial appearance of a person during these situations?
(d) Do these situations occur due to emotional causes? If yes, name them.
Skin
71 Likes
Answer
(a) The process/condition shown in figures A and B are :
- A → Vasoconstriction
- B → Vasodilation
(b) Vasoconstriction occurs in cold climatic conditions. Vasodilation occurs in hot climatic conditions.
(c) The facial appearance of a person becomes pale or bluish during vasoconstriction and reddish during vasodilation.
(d) These situations may occur due to fright, nervousness or sudden emotion.
Answered By
49 Likes
Related Questions
Given below is a diagrammatic sketch of the vertical section of human skin.
(a) Label the parts numbered 1 to 9
(b) State one main function of each of the following parts:
- Part 2.
- Part 3.
- Part 4.
- Part 9.
(c) Name any one of the above parts which has at least three functions.
(d) Part 4 may add to one's good appearances or the "figure". State one example of this function which may be common to both men and women.
Draw a labelled diagram of the generalized vertical section of mammalian skin.