Chapter 14, Problem 1A

Summary Introduction

Introduction:

Nervous system controls and coordinates the functions of body. It is comprised of brain, spinal cord, sensory organs and spinal cord. Nervous tissue has two types of cells: neurons and glial cells. Neuron is a structural and functional unit of nervous system. It has ability to receive the electrical signal and convert them into an action potential and transmit it to other cells.

Answer to Problem 1A

Correct answer:

The parts of the neuron receives signals from sensory receptors of other neurons are dendrites. Therefore, option (c) is correct.

Explanation of Solution

Reason for the correct statement:

The dendrites are short extension which receives signals from the sensory organs or from the other neurons.

Option (c) is given as “dendrites”.

As “the neuron parts receives signals from sensory receptors of other neurons are dendrites”, it is the right answer.

Hence, option (c) is correct.

Reasons for the incorrect statements:

Option (a) is given as “cell body”.
Cell body does not receive any signals from sensory receptors of other neurons. As the above mentioned statement is neuron parts receives signals from sensory receptors of other neurons. So, it is a wrong answer.

Option (b) is given as “axon”.
Axon conducted the nerve impulses. It does not receive any signals from sensory receptors of other neurons. As the above mentioned statement is neuron parts receives signals from sensory receptors of other neurons. So, it is a wrong answer.

Option (d) is given as “both (a) and (c) are correct”.
Axon does not receive any signals but dendrites receive signals from sensory receptors of other neurons. So, it is a wrong answer.

Hence, options (a), (b), and (d) are incorrect.

Conclusion

The dendrites are short extension which receives signals from the sensory organs or from the other neurons.