Question

V. Choose the odd one out and give scientific reasons.
1. Spinal cord, cerebrum, cerebellum, medulla oblongata
2. Dendrites, axon, cyton, cerebellum
3. Stimuli, receptors, effectors, impulses
4. Axon, cerebellum, cell body, dendrite
5. Cerebellum, cerebrum, medulla oblongata, neuron​

Answer 1

Answer:

1. spinal cord

2.cerebellum

3.stimuli

4.axon

5.neuron

Answer 2

Answer:

The odd ones out in the given questions along with the scientific reasons are as follows

1. Spinal cord- the other three options are the parts of the brain.

2. Cerebellum- The other three options are the parts of the neuron.

3. Stimulus- The other three options indicate the components of the sensory mechanism.

4. Cerebellum- Remaining options are the parts of the neuron.

5. Neuron- The other three options are the parts of the brain.

Explanation:

1. The spinal cord is the odd one out as the cerebellum, the cerebrum and the medulla oblongata are the parts of the brain.

• The cerebrum belongs to the forebrain region and the hindbrain consists of the cerebellum and medulla oblongata.

• The medulla oblongata connects the brain to the spinal cord.

2. The cerebellum is the odd term out as the dendrites, axon and cyton are all the parts of a neuron.

• A neuron consists of a cell body- cyton, long nerve fiber-axon, and appendages that help in communication- dendrites.

3. Impulses are the electrical signals which are generated when a neuron gets stimulated.

• The receptors on receiving a stimulus generate impulse and respond via effectors.

• The stimulus is the change in the external or internal environment which generates the sensory mechanism.

4. Cerebellum is the odd term as the remaining options are the parts of a neuron.

• The cerebellum is the part of the brain controlling the postural functions and maintaining balance.

5. Neuron is the odd one out as the remaining three structures are the parts of the brain.