Structure of Nerve Cell

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

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

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

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

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

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

Q. Label the parts of a neuron.

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