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A and B Are the Two Systems of Control and Coordination in the Human Body. the Messages in System a Are Transmitted in the Form of Chemical Substances C Which Travel Comparatively Slowly Through the Blood Stream. the Substances C Are Made in Tissues D Present in the Head and Trunk of Human Body. the Messages in System B Are Transmitted Very Quickly in the Form of Electrical Impulses Through Fibres E. the Effect of Messages Transmitted by System B Usually Lasts for a Much Shorter Time as Compared to Those Transmitted by System A. (A) Name the System A. What Does System a Consist Of? (B) Name the Chemical Substance C. (C) What is Tissue D? Name Any Five Such Tissues in the Human Body. (D) Name the System B. What Does System B Consist Of? (E) Name the Fibres E. (F) State Whether System a Controls the Working of System B Or System B Controls the Working of System A. - CBSE Class 10 - Science

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Question

A and B are the two systems of control and coordination in the human body. The messages in system A are transmitted in the form of chemical substances C which travel comparatively slowly through the blood stream. The substances C are made in tissues D present in the head and trunk of human body. The messages in system b are transmitted very quickly in the form of electrical impulses through fibres E. The effect of messages transmitted by system b usually lasts for a much shorter time as compared to those transmitted by system A.
(a) Name the system A. What does system A consist of?
(b) Name the chemical substance C.
(c) What is tissue D? Name any five such tissues in the human body.
(d) Name the system B. What does system B consist of?
(e) Name the fibres E.
(f) State whether system A controls the working of system B or system B controls the working of system A.

Solution

  1. A represents the endocrine system. The endocrine system is composed of glands.
  2. C represents hormones. Hormones are the chemical messengers of the body and they travel slowly through the bloodstream.
  3. D represents endocrine glands that are made up of tissues. Hypothalamus, thyroid, thymus, pancreas and adrenal glands are some of the endocrine glands present in the human body.
  4. B represents the nervous system. It comprises the brain, spinal cord and nerves.
  5. E represents nerve fibres. They transmit messages very quickly in the form of electrical impulses.
  6. The nervous system (B) controls the working of the endocrine system (A).
  Is there an error in this question or solution?

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 Lakhmir Singh Solution for Biology for Class 10 (2018 to Current)
Chapter 2: Control and Coordination
Q: 104 | Page no. 120

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Solution A and B Are the Two Systems of Control and Coordination in the Human Body. the Messages in System a Are Transmitted in the Form of Chemical Substances C Which Travel Comparatively Slowly Through the Blood Stream. the Substances C Are Made in Tissues D Present in the Head and Trunk of Human Body. the Messages in System B Are Transmitted Very Quickly in the Form of Electrical Impulses Through Fibres E. the Effect of Messages Transmitted by System B Usually Lasts for a Much Shorter Time as Compared to Those Transmitted by System A. (A) Name the System A. What Does System a Consist Of? (B) Name the Chemical Substance C. (C) What is Tissue D? Name Any Five Such Tissues in the Human Body. (D) Name the System B. What Does System B Consist Of? (E) Name the Fibres E. (F) State Whether System a Controls the Working of System B Or System B Controls the Working of System A. Concept: Hormones in Animals.
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