Tag: animal tissue

Questions Related to animal tissue

Area of coming together of two neuron ends in between a dendrite and axon end is known as

biology animal tissue types of neuron nervous tissue neural tissues

  1. Synapse

  2. Synapsis

  3. Cell junction

  4. Synapticula

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Correct Option: A
Explanation:

In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. Synapsis is the fusion of chromosome pairs at the start of meiosis. A cell junction (or intercellular bridge) is a type of structure that exists within the tissue of some multicellular organisms, such as animals. Cell junctions consist of multiprotein complexes that provide contact between neighbouring cells or between a cell and the extracellular matrix. Synapticula is one of the numerous calcareous processes which extend between, and unite, the adjacent septa of certain corals.

Therefore, the correct answer is option A.

A neuron transmits information through

biology animal tissue types of neuron nervous tissue neural tissues

  1. Electrical signals

  2. Chemical signals

  3. Both A and B

  4. None of the above

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Correct Option: C
Explanation:
Neurons are cells that send and receive electro-chemical signals to and from the brain and nervous system. There are about 100 billion neurons in the brain. 

Why defects in the myelin sheath is dangerous?

biology animal tissue types of neuron nervous tissue neural tissues

  1. Action potentials would be conducted too slowly along the neurons

  2. Muscles would not contract when stimulated

  3. The thyroid gland would not be able to produce thyroxine

  4. The bone tissue would not be properly maintained

Show answer
Correct Option: A
Explanation:

The myelin sheath of neurons provides them with an insulating covering. It allows rapid transmission of signals from the nervous system to the body and vice-versa. Any damage to the myelin sheath will cause hindrance and slowing down of the transmission of signals to the axons.

So, the correct answer is 'Action potentials would be conducted too slowly along the neurons'.

The cells which pass the instructions from brain to different parts of the body are called as

biology animal tissue types of neuron nervous tissue neural tissues

  1. Muscle tissue

  2. Neurons

  3. Red blood cells

  4. White blood cell

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Correct Option: B
Explanation:
A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. Neurons can connect to each other to form neural networks. Neurons are the core components of the brain and spinal cord of the central nervous system (CNS), and of the ganglia of the peripheral nervous system (PNS). 
Therefore, the correct answer is option B.

State whether the following statement is true or false.

Damage to any segment of the spinal cord can affect bodily functions. 

biology animal tissue types of neuron nervous tissue neural tissues

  1. True

  2. False

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Correct Option: A
Explanation:

The four segments of the spinal cord, going from top to bottom, these are the cervical, thoracic, lumbar and sacral segments. Injury to a certain segment of the cord will generally affect the parts of the body below the point of injury. Depending upon the severity and extent of the injury, there will be varying loss of movement and sensation. Damage to the spinal cord can also affect bodily functions such as breathing, bowel and bladder function, hormone release, temperature control, and movement of food through the stomach and intestines. It bears repeating that no two spinal cord injuries behave exactly alike. 

Therefore, the correct answer is option A.

Most of the neurons of our body are

biology animal tissue types of neuron nervous tissue neural tissues

  1. Unipolar

  2. Bipolar

  3. Pseudounipolar

  4. Multipolar

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Correct Option: D
Explanation:

A unipolar neuron is a type of neuron, in which only one neurite or protoplasmic process extends from the cell body. Bipolar neuron is a type of neuron, which has two processes extending from the cell body. Pseudounipolar contains an axon, that has split into two branches, one branch runs to the periphery and the other to the spinal cord. A multipolar neuron is a type of neuron that possesses a single, long axon and many dendrites. The majority of the neurons are multipolar.

Show the pathway of electric impulse.

biology animal tissue types of neuron nervous tissue neural tissues

  1. $Dendrite \rightarrow Cell\ body\rightarrow Axon\rightarrow$ to its end

  2. $Cell\ body \rightarrow Dendrite\rightarrow Axon\rightarrow$ to its end

  3. $Axon\rightarrow Cell\ body\rightarrow Dendrite\rightarrow$ to its end

  4. $Dendrite\rightarrow Axon\rightarrow Cell\ body\rightarrow$ to its end

Show answer
Correct Option: A
Explanation:

The dendrites are the short, cytoplasmic extension which is present in the sensory organs and are responsible for the reception of the electric impulse. The dendrite passes the electric impulse to the cell body which passes the impulse to the axon. The axon is the long cytoplasmic extension of the neuron. There are telodendrons which are present at the tail of the axons. These regions can release neurotransmitters which can help in the transmission of the impulse through the synapse to the next neuron.

Thus, the correct answer is option A. 

Afferent nerve fibres carry impulses from 

biology animal tissue types of neuron nervous tissue neural tissues

  1. Effector organs to central nervous system

  2. Receptors to central nervous system

  3. Central nervous system to muscles

  4. Central nervous system to receptors

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Correct Option: B
Explanation:

In the nervous system, afferent neurons (otherwise known as sensory neurons), carry nerve impulses from receptors or sense organs toward the central nervous system.

Units of nervous system are ______________.

biology animal tissue types of neuron nervous tissue neural tissues

  1. Cytons

  2. Axons

  3. Neurons

  4. Dendrites

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Correct Option: C

Which is not a neuroglial cell?

biology animal tissue types of neuron nervous tissue neural tissues

  1. Oligodendrocyte

  2. Microglia

  3. Astrocyte

  4. Chondrocyte

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Correct Option: D
Explanation:

The neuroglia or glial cells are defined as supportive cells of the central nervous and peripheral nervous system that primarily support, protect and nourish the neurons. There are basically four types of neuroglial cells:-

Astrocytes, Oligodendrocytes, Microglia and Ependyma.While Chondrocytes are cells that make up the dense connective tissue that is present in the cartilage matrix.
So, the correct answer is 'Chondrocyte'.