Structure of Nerve Cell

Q.

Explain the functions of a neuron.

Q.

Why do nerve cells do not divide?

Q. Myelin sheath is produced by:

1. Astrocytes and Schwann Cells
2. Oligodendrocytes and Osteoclasts
3. Osteoclasts and Astrocytes
4. Schwann Cells and Oligodendrocytes

Q.

Describe the structure and function of the neuron with a labeled diagram

Q.

Question 53
Why is the flow of signals in a synapse from the axonal end of one neuron to dendritic end of another neuron but not the reverse?

Q. X, Y, Z are different parts of a neuron. X contains nucleus, surrounded by cytoplasm. It has all the cell organelles. Y conducts nerve impulse to X. Z is a long process from X and conducts nerve impulse away from X. Identify X, Y and Z.

1. X- Cell body, Y- Axon, Z- Nissl's granules
2. Y- Cell body, X- Dendrites, Z- Axon
3. Z- Cell body, Y- Axon, X- Nissl's granules
4. X- Cell body, Y- Dendrites, Z- Axon

Q.

What function do you think the three major regions of a neuron serve?

Q. ________ is the area of contact between two neurons.

1. Axon
2. Cell body
3. Nucleus
4. Synapse

Q.

Question 38
Label the parts of a neuron in the figure

Q.

Explain the structures and functions of a neuron

Q.

The supporting cells found within human neurons are called___

1. Dendrite cells

2. Node of Ranvier

3. Neuroglial cells

4. Ganglion

Q.

State whether the following actions are voluntary action, reflex action or conditioned reflex.

1. Blinking
2. Cleaning the table
3. Playing on the key board
4. Salivating when food is put in the mouth
5. We close our ears when we hear unbearable sound

Q.

______ send signals away from the neurons whereas ______ receive signals from other neurons.

1. Axons; synapses

2. Axons; dendrites

3. Dendrites; axons

4. Synapses; dendrites

Q. Which part of the neuron receives signals from another neuron?

1. Dendrite
2. Axon
3. Cyton
4. Myelin sheath

Q. In the central nervous system, myelinated parts of the neuron form the ___, while the non-myelinated parts of the cells form the ___.

1. Grey matter, white matter
2. White matter, grey matter
3. Yellow matter, white matter
4. Red matter, yellow matter

Q. Which among the following conducts the nerve impulse towards the cell body?

1. Axon
2. Dendrites
3. Schwann cell
4. Nissls granules

Q.

Question 45
Draw the structure of a neuron and explain its function.

Q. Which amongst the following is known as the functional unit of the nervous system?

1. Cyton
2. Dendron
3. Neuron
4. Auxin

Q. Dendrites of one neuron connect to the axons of the another neuron through:

1. Axon
2. Schwann cell
3. Synapse
4. Nissl's granules

Q. Label the parts of a neuron.

1. Cell body
2. Dendrites
3. Nodes of Ranvier
4. Axon terminal

Q. Identify the missing parts in the following diagram.

1. a - Dendrites, b - Nucleus, c - Axon, d - Cell body
2. a - Axon, b - Dendrites, c - Cell body, d - Nucleus
3. a - Dendrites, b - Cell body, c - Axon, d - Nucleus
4. a - Axon, b - Cell body, c - Dendrites, d - Nucleus

Q. Which of the following is specialised for transmitting impulses?

1. Connective tissue
2. Muscular tissue
3. Nervous tissue
4. Epithelial tissue

Q. The myelin sheath shows gaps through out the length of the axon called the.

1. nodes of Ranvier
2. dendrites
3. axon terminal
4. cell body

Q. The projections extending from the cell body of the neuron are called ________ .

1. dendrites
2. schwann cell
3. nissl's granules
4. nucleus

Q. The substance that is released at axonal endings to propagate a nervous impulse are called _______ .

1. neurons
2. neurotransmitters
3. synapse
4. effectors