Single Choice

All information from our environment is detected by the specialized .................. cells.

ANerve
Correct Answer
BNephron
CGlial
DCompanion

Solution

The two main types of cells of the nervous system are neurons/nerve cells and neuroglia. The main function of neurons is to receive sensory inputs from the internal and external environment by sensory nerves and transmit it to CNS (brain and spinal cord) for processing and finally transmit the nerve impulses from CNS to effectors (muscles and glands).
Neuroglia/glial cells support and nourish the nerve cells, destroy pathogen and modulate the impulse transmission.
The nephron is the anatomical and functional unit of kidney and thus is the part of the excretory system.
Companion cells are the component of phloem in flowering plants and regulate loading and unloading of sugars into sieve tube elements for translocation.
Therefore, the correct answer is option A.

SIMILAR QUESTIONS

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Given below is the diagram of a neuron. Name the parts numbered 1-5.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Cyton is the nucleus of a nerve cell.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Study the diagram given below and the answer the questions that follow: (a) Identify the cell. (b) Name the parts labelled 1,2,3,4,5, and 6. (c ) Where is this cell likely to be found in the human body and what is its function?

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

The longest cell in animals.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

The Nissl granules of nerve cells are made up of

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Nissl granules are mostly present in

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

................... is the functional and structural unit of the nervous system.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Main parts of a neuron are ............... and .........................

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong. Example: Nose, Tongue, Arm, Eye Answer: Odd Term- Arm, Category- Sense organs Dendrites, Medullary Sheath, Axon, Spinal cord.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Answer the following questions. i) Draw a well labelled diagram of a neuron and name the following parts. 1) Node of Ranvier 2) Nissil granules 3) Cyton ii) Name the part of the human brain which is concerned with the following. 1. Seat of memory 2. Coordinates muscular activity iii. Mention any three major activities of the WHO.

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