Types of Neurons

Q. Which of the following is not involved in knee- jerk reflex?

1. Muscle spindle
2. Motor neuron
3. Brain
4. Inter neurons

Q. Match the following from column I and Column II ?
$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{(A) Bipolar neuron}& \text{(i) Embryonic stage}\\ \text{(B) Unipolar neuron}& \text{(ii) Cerebral cortex}\\ \text{(C) Multipolar neuron}& \text{(iii) Retina}\end{array}$

1. A-iii, B-i, C-ii
2. A-iii, B-ii, C-i
3. A-ii, B-i, C-iii
4. A-ii, B-iii, C-ii

Q. Unipolar neurons are found only in

1. early embryos
2. retina of the eye
3. spinal cord
4. olfactory epithelium

Q. ________ are found in the retina of the eye.

1. Bipolar neurons
2. Multipolar neurons
3. Both a and b
4. Unipolar neurons

Q.

Differentiate between nerve cord and notochord.??

Q.

Where can multipolar neurons be found?

Q. Which of the following diagram illustrates the distribution of $N{a}^{+}$ and $K^{+}$ ions in a section of non-myelinated axon which is at resting potential?

1. 
2. 
3. 
4. 

Q. Which of the following about neurons is incorrect?

1. Nissl’s granules are basophilic
2. Cyton of the neuron possess a large nucleus
3. Schwann cells form a myelin sheath around the axon
4. Bipolar neuron has one axon and two dendrites

Q. Which of the following is not true for chordates?

1. Notochord is present
2. Pharynx is perforted by gill slits
3. Heart is ventral
4. Central nervous system is ventral

Q. I have a doubt.
I have read that methanogens are present in cows gut. Hence, methanogens digest whatever they can in the cow's gut. There should hence be nothing in cow's excreta that can be digested by methanogens (Everything is digested before excretion).
If I am correct till here.. it means that if we provide cow's dung to methanogens for them to break it down they have nothing left and won't be able to break it down.
Then how can we use cow dung in a biogas plant because cow dung has nothing left to be digested by methanogens!!!???

Q. Multipolar nerve cells are present in :

1. Cochlea
2. Dorsal root ganglia of spinal cord
3. Retina of eye
4. Brain

Q.

Write about myelin sheath.

Q.

Rods and Cones of the retina are modified into______.

1. Bipolar Neurons.

2. Unipolar neurons

3. Multipolar neurons

4. None of these

Q.

What are the four neurons which conduct visual impulses to the visual cortex?

Q.

Name a region where bipolar neurons are seen.

Q. Choose the correct option concerning earthworm.

1. Dorsal notochord and ventral nerve cord
2. Ventral notochord and no nerve cord
3. No notochord and ventral nerve cord
4. No notochord and dorsal nerve cord

Q.

In the absence of nucleus:

1. Cell cannot survive

2. Cell can survive

3. Cell survive till cytoplasmic proteins are exhausted

4. All of the above

Q. Match the following.
(Dend.- dendrites; proc.- process)

1. 2 processes
2. 1 proc. splits in 2
3. 1 axon, many dend.
4. Seen in embryo

Q. A neuron with one axon only may be observed in:

1. Dorsal root ganglion of spinal nerve
2. Embryonic stage
3. Retina of eye
4. All of these

Q. The path taben by the light striking the retina will be:

1. Sensory nerves $\to$ Ganglionic cells $\to$ Bipolar neurons $\to$ Photosensory cells
2. Photosensory cells $\to$ Ganglionic cells $\to$ Bipolar neurons $\to$ Sensory nerves
3. Photosensory cells $\to$ Bipolar neurons $\to$ Ganglionic cells $\to$ Sensory nerves
4. Sensory nerves $\to$ Bipolar neurons $\to$ Ganglionic cells $\to$ Photosensory cells

Q. Fill in the blanks with appropriate words.
The nerves carrying impulse messages from the central nervous system to the effectors are called .......... , while those carrying sensory messages to the central nervous system are called ..........

Q. A bipolar neuron has __________________.

1. One axon and one dendron
2. Two axons and one dendron
3. One axon and two dendrons
4. Two axons and two dendrons

Q. Where are the bipolar nerve cells present in the human body?

Q.

What is meant by notochord and nerve cord ?

Q. The box given below shows some cells found in the human body. Which of these cells are found in the nervous system?

1. R
2. Q
3. S
4. P

Q. (i) Give an account of the structure of different kinds of neurons.

Q. Nicotine present in cigarettes and beedis stimulate the

1. Nervous system
2. Productive system
3. Blood circulatory system
4. Respiratory system

Q. Chordates are distinguished from non chordates by the presence of

1. ventral nerve cord
2. dorsal heart
3. open circulatory system
4. dorsal tubular nerve cord

Q. Neural canal develops from

1. Ectoderm
2. Endoderm
3. Mesoderm
4. All of the above
5. None of the above

Q. Given below is an example of certain structures and their special functional activities :
For example : Eye and vision. On a similar pattern complete the following :
(i) Neutrophils : ___________________________
(ii) Ureter : _______________________________
(iii) Neurotransmitters : _____________________
(iv) Iris of the eye : ________________________
(v) Placenta : ____________________________