Question

Means (system) of communication between locations in animals are :
A. Muscular
B. Endocrine
C. Respiratory
D. Nervous
E. Skeletal
Choose the correct answer from the options given below :

• A. A and E only
• B. A and B only
• C. B and D only
• D. C and D only

Hint:

The nervous system is like the body's "wired" internet connection (fast, point-to-point), while the endocrine system is like a "radio broadcast" (slower, reaches anywhere blood flows, but only cells with the right receptor "antenna" respond).

Answer 1

The Correct Option is C

Step 1: Concept:
This question identifies the physiological organ systems responsible for transmitting information and coordinating actions between different parts of a multicellular animal body.

Step 2: Step-by-step Explanation:

• Animals possess two primary systems dedicated to internal communication, regulation, and control:

• The Nervous System (D): Provides rapid, highly targeted communication through electrical impulses travelling along neurons and chemical neurotransmitters crossing synapses. It acts instantly to coordinate immediate responses.

• The Endocrine System (B): Provides slower, broader, and more sustained communication by releasing chemical messengers (hormones) into the bloodstream, which travel to distant target organs.

• The Muscular (A) and Skeletal (E) systems are responsible for movement and structural support. The Respiratory system (C) handles gas exchange. None of these serve primarily as information transmission networks between distant body locations.
Therefore, only the Endocrine and Nervous systems act as communication networks.

Step 3: Final Answer:
The systems of communication are B and D only, which corresponds to option (C).