Tag: plant and animal tissues

Quizzes (6) Questions (70)

Questions Related to plant and animal tissues

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Which pair of structures distinguishes a nerve cell from other cells?

  1. Vacuole and fibres

  2. Nucleus and mitochondria

  3. Perikaryon and dendrites

  4. Flagellum and medullary sheath
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The perikaryon (cell body) and dendrites are characteristic structures of a neuron that distinguish it from other typical animal cells. While other cells have nuclei and mitochondria, these specific extensions and the cell body structure are unique to neurons.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

The area where medullary sheath is absent in the nerve fibre is

  1. Nissl granules

  2. Schwann cells

  3. Node of Ranvier

  4. Schwann node
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The medullary sheath is composed of a shinning, white, fatty substance called myelin. This sheath perhaps serves as an insulating layer, preventing loss of energy of the nerve impulse during its passage along the fibre. The medullary sheath is continuous around the fibres in the central nervous system, but in the fibres of the peripheral nerves, it is absent at certain points known as the Node of Ranvier. The part of a nerve fibre between two successive nodes is termed the internode.

So, the correct answer is 'Node of Ranvier'.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Choose the odd pair.

  1. Areolar connective tissue - Collagen

  2. Epithelium - Keratin

  3. Muscle fibre - Actin

  4. Neuron - Melanin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Areolar tissue contains collagen, epithelium contains keratin, and muscle fibers contain actin. Melanin is a pigment found in skin and hair, not a structural protein characteristic of neurons.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Non-excitable variously shaped cells found between neurons are ________________.

  1. Glial cells

  2. Schwann cells

  3. Dendrites

  4. Nissl bodies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is option A i.e. "Glial cells"
Glial cells- These cells are the helper cells in the central nervous system. They surround the neurons and provide insulation between two neurons. There are variously shaped like oligodendrocytes, astrocytes (star-shaped), ependymal etc.
Dendrites- They are branched extensions of nerve cells.
Nissl bodies- It is a large granular body found in the neuron cells.
Schwann cell- They are present in the axon of a neuron. They help in supporting nerve regeneration.
Thus the correct answer is "Glial cells"

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

On nerve fibres, to prevent leakage of an impulse, a layer of ...... is found.

  1. Rod cells

  2. Neurilemma

  3. Axons

  4. Myelin sheath
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Myelin is an insulating layer, or sheath, that forms around nerves. It is made up of protein and fatty substances. The fat helps to insulate the axons from electrically charged atoms and molecules. The purpose of the myelin sheath is to allow electrical impulses to transmit quickly and efficiently along the nerve cells.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Some cell in our body can be over a feet long. They are

  1. Muscle cells

  2. Bone cells

  3. Nerve cells

  4. Gland cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Certain neurons or nerve cells may almost equal the length of body itself. The axon of a motor neuron in the spinal cord, that innervates a muscle in the foot can be about 1 meter (3 feet) in length.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Which one is absent in neurons ?

  1. Neurilemma

  2. Axon

  3. Sareolemma

  4. Dendrites
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sareolemma appears to be a misspelling of sarcolemma, which is the cell membrane of muscle fibres, NOT neurons. Neurons DO have neurilemma (Schwann cell membrane), axon, dendrites. The spelling error makes option C the correct answer as the absent structure.