Types of Neurons

Q.

Which of these neurons carry impulses from the CNS to the effectors?

1. Association neurons

2. Sensory neurons

3. Connection neurons

4. Motor neurons

Q.

What is stimulus and response?

Q. What happens when a diaphragm is ruptured in an accident?

Q.

Question 5 (b)
Tick the correct answer:
(b) During heavy exercise, we get cramps in the legs due to the accumulation of
(i) carbon dioxide
(ii) lactic acid
(iii) alcohol
(iv) water

Q.

What is the function of motor neuron?

Q. How do the muscles act on getting impulse?

Q. What is a neuromuscular junction?

1. A gap between two axons
2. A gap between two neurons
3. The synapse between a motor neuron and a skeletal muscle cell
4. The synapse between a sensory neuron and a skeletal muscle cell

Q. A neuron contains cyton axon and dendrites. Then how can neuron in a nerve just be axon. As nerve is considered to be a bundle of axons. Why do neurons in a nerve don not have cyton but just contains axons?

Q.

Control of reflex action is through ___ .

Q.

Nerve which carries nerve impulse from tissue to central nervous system is called

1. Afferent

2. Efferent

3. Motor

4. Mixed

Q. Why do impulses flow only in one direction in reflex arc

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Q.

Match the following:

$\begin{array}{cc}\text{I. Multipolar neuron}& \text{p. Two processes}\\ \text{II. Bipolar neuron}& \text{q. Single process that splits into two}\\ \text{III. Unipolar}& \text{r. One axon and many dendrites}\\ \text{IV. Pseudounipolar neuron}& \text{s. Found in embryonic state}\end{array}$

1. I-q, II-s, III-p, IV-r

2. I-q, II-s, III-r, IV-p

3. I-r, II-p, III-s, IV-q

4. I-q, II-s, III-r, IV-p

Q.

What are the two ways in which nervous system communicates with muscles?

Q.

Is blinking of eyes a reflex action?

Q.

Identify the neuron that helps in forming the spinal cord and brain.

1. Sensory neurons

2. Motor neurons

3. Interneurons

Q. What is the difference between neurons (nerve cells) and nerves?

Q.

Mark the parts labelled in the following diagram

1. A - Receptor, B - Sensory neuron, C - Motor neuron, D - Relay neuron

2. A - Central Nervous System, B - Electrical impulse, C - Sensory neuron, D - Motor neuron

3. A - Central Nervous System, B - Electrical impulse, C - Sensory neuron, D - Motor neuron

4. A - Neuromuscular junction, B - Cell body, C - Sensory neuron, D - Motor neuron

Q.

Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action.

(ii) Sensory neurons carry signals from the spinal cord to muscles.

(iii) Motor neurons carry signals from receptors to the spinal cord.

(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc.

1. (i) and (ii)
2. (i) and (iii)
3. (i) and (iv)
4. (i) , (ii) and (iii)

Q. Match the following neurons with their criteria.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Multipolar}& \text{a. One axon and One dendrite}\\ \text{ii. Bipolar}& \text{b. One axon and Several dendrites}\\ \text{iii. Unipolar}& \text{c. One cell process that splits into two axons}\\ \text{iv. Pseudo Unipola}r& \text{d. Cell body with One axon only}\end{array}$

1. i).➡ d., ii).➡ c., iii).➡ b., iv). ➡ a.

2. i).➡ a., ii).➡ b., iii).➡ c., iv). ➡ d.

3. i).➡ c., ii).➡ d., iii).➡ a., iv). ➡ b.

4. i).➡ b., ii).➡ a., iii).➡ d., iv). ➡ c.

Q. What is the other name of efferent neurons?

1. Motor neurons
2. Sensory neurons
3. Interneurons
4. Afferent neurons

Q.

What kind of cellular respiration takes place inside our muscle cells, when we are resting?

1. Both aerobic and anaerobic

2. Fermentation

3. Anaerobic

4. Aerobic

Q.

What is the term for" the ability of nerve cells to respond to stimuli and convert them into nerve impulses?"

Q.

Assertion: Relay neurons form connection between other neurons.

Reason : Relay neurons, though form nerve connections, are only present in brain.

1. A & R both are incorrect

2. A is correct, R is incorrect

3. A is incorrect and R is correct

4. A & R both are correct

Q.

Choose the correct answer from the four options given below:

A reflex arc is best is best described as movement of stimuli from

1. Receptor cell, sensory neuron, relaying neuron, effector muscles

2. Receptor cell, efferent nerve, relaying neuron, muscles of the body

3. Receptor cell, spinal cord, motor neuron, relaying neuron

4. Receptor cell, synapse, motor neuron, relaying neuron

Q.

What is a neuro-muscular junction?

Q.

Most of the neurons of our body are ___.

1. Neuroglia

2. Multipolar

3. Bipolar

4. Unipolar

Q.

Are pre and postsynaptic neurons associated with each other at electrical synapses?

Q.

Can fermentation result in the production of lactate?

Q.

In humans, the alternative pathway of respiration where pyruvate is converted into a three- carbon compound called lactic acid is found in-

1. Intestinal villi

2. Alveoli of lungs

3. Nerve cells

4. Muscle cells

Q.

Question 2
What does a neuron look like?