Neuron

Q. Statement-1: Reflex arcs have evolved in animals because the thinking process of the brain is not fast enough.
Statement-2: All involuntary actions are reflexes but all reflexes are not involuntary.
Statement-3: Reflex arcs continue to be more efficient for quick responses even after complex neuron networks have come into existence.

1. Only statement-1 is correct
2. Statement-1 and statement-2 are correct
3. Statement-1 and statement-3 are correct
4. All statements are correct

Q.

Machine learning is a subset of deep learning. True or False?

1. True
2. False

Q.

How are involuntary actions and reflex actions different?

Q.

What is the basic unit of the nervous system?

Q.

Differentiate between nervous coordination and chemical coordination.

Q.

What is a motor unit?

Q.

What are the special properties of neurones.

Q.

What are the derivatives of neural crests?

Q.

What is the function of a dendrite?

Q. The neurons which transmit impulses from the central nervous system towards the effectors are called

1. Relay neurons
2. Connector neurons
3. Motor neurons
4. Sensory neurons

Q.

Which of the following cells do not divide in adult humans?

1. Nerve cell

2. Liver cell

3. None of the above

4. Tumor cell

Q.

what is the difference between afferent and efferent neurons ?

Q. Cell body of neuron is also known as

1. Dendrite
2. Axon
3. Soma
4. Synapse

Q. Relay neurons are found in which part of the nervous system?

1. Central nervous system
2. Peripheral nervous system
3. Autonomous nervous system
4. Cranial nerves

Q.

What are interneurons ? Explain their location and function.

Q.

The largest cell in the body is:

1. WBC

2. Neuron

3. RBC

4. Muscle cell

Q.

What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs? [3 MARKS]

Q.

Question 2
Electrical impulse travels in a neuron from

(a) Dendrite → axon → axonal end → cell body
(b) Cell body → dendrite → axon → axonal end
(c) Dendrite → cell body → axon → axonal end
(d) Axonal end → axon → cell body → dendrite

Q.

Name the part of neuron:

(i) Where information is acquired.

(ii)Through which information travels as an electric impulse.

Q. The chemicals released when the electrical impulse reaches the axon ending is called ‘X’. These ‘X’ are present in ‘Y’ located in the ‘Z’. Identify X, Y and Z.

1. X - Synaptic knobs Y - Neurotransmitters Z - Synaptic vesicles
2. X - Synaptic clefts Y - Synaptic vesicles Z - Synaptic knobs
3. X - Neurotransmitters Y - Synaptic vesicles Z - Synaptic knobs
4. X - Neurotransmitters Y - Synaptic clefts Z - Synaptic vesicles

Q.

What is the function of a receptor?

Q.

What is the basic structural and functional unit of the nervous system?

1. Brain

2. Neuron

3. Nerve impulse

4. Spinal cord

Q.

what is Schwann cell?

Q. Amongst the following, which is not a conditioned reflex?

1. Playing a musical instrument
2. Pedaling a cycle
3. Writing
4. Blinking of eyes

Q. Dendrites are short fibres which branch repeatedly and protrude out of the cell body.

1. True
2. False

Q.

Rearrange the following in correct sequence pertaining to what is given within brackets at the end.

(a) Effector -Sensory neuron - Receptor - Motor neuron - Stimulus - Central nervous system - Response (Reflex arc)

(b) Repolarisation - Depolarisation - Resting (polarised) (during conduction of nerve impulse through a nerve fibre)

(c) Axon endings - Nucleus - Dendrites - Axon - Perikaryon - Dendron (Neuron structure)

(d) Diencephalon - Cerebellum - Medulla oblongata - Pons- Cerebrum - midbrain (sequence of parts of the human brain).

Q. Which of the following components of neuron is/are also known as soma?

1. Dendrites only
2. Axon only
3. Both dendrites and axon
4. Cyton

Q.

Which of the following carries impulses to and from the brain and spinal cord?

1. Sensory nerve

2. Mixed nerve

3. Motor nerve

4. Connective tissue

Q.

Nerve cells having one dendrite and one axon is called

1. Unipolar

2. Bipolar

3. Multipolar

4. None of these

Q.

___________ connects the sensory neuron and the motor neuron.

1. Interneuron

2. Spinal cord

3. Receptor

4. Mixed Neuron