Tag: zoology

Questions Related to zoology

3rd, 6th and 11th cranial nerves are

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. Optic, facial and accessory spinal

  2. Oculomotor, trigeminal and accessory spinal

  3. Trigeminal, abducens and vagus

  4. Oculomotor, abducens and accessory spinal

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Correct Option: D

Cranial nerve showing maximum branching is

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. Trigeminal

  2. Vagus

  3. Optic

  4. Facial

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Correct Option: B

Hypoglossal nerve controls the movements of

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. Ear

  2. Heart

  3. Tongue

  4. Limbs

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Correct Option: C

Vagus nerve is

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. Sensory tenth cranial nerve

  2. Motor tenth cranial nerve

  3. Mixed tenth cranial nerve

  4. Mixed eleventh cranial nerve

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Correct Option: C

The $3^{rd}, 6^{th} and 11^{th}$ cranial nerves are respectively

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. oculomotor, abducens and accessory

  2. oculomotor, trigeminal and accessory

  3. optic, facial and accessory

  4. trochlear, abducens and vagus

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Correct Option: A
Explanation:

In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves- olfactory (I), optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), and hypoglossal (XII).

The vagus nerve is the _______ cranial nerve.

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. $7^{th}$

  2. $5^{th}$

  3. $10^{th}$

  4. $9^{th}$

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Correct Option: C
Explanation:

The vagus nerve historically cited as the pneumogastric nerve, is the tenth cranial nerve or CN X, and interfaces with parasympathetic control of the heart, lungs, and digestive tract. The vagus nerves are paired but are normally referred to in the singular. It is the longest nerve of the autonomic nervous system in the human body.


So the correct option is '10th'.

Vagus nerve is

zoology nervous system of man pns divisions of nervous system peripheral nervous system

  1. 5th cranial nerve

  2. 6th cranial nerve

  3. 9th cranial nerve

  4. 10th cranial nerve

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Correct Option: D

From the list of characters given. Choose the characteristic which are exclusive to birds.
(a) Pneumatic bones
(b) Lungs with air sacs
(c) Four chambered heart
(d) Homoithermy
(e) Feathers
(f) Scales
(g) Crop and gizzard.

zoology tissue level of organisation specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. (a), (b), (d), (e) & (g)

  2. (a), (b) & (e)

  3. (a), (b)

  4. (e) only

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Correct Option: A

The direction of impulse in a typical neuron is

zoology tissue level of organisation specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. Axon to dendron

  2. Dendron to axon

  3. Both A and B

  4. None of these

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Correct Option: B
Explanation:

In a typical neuron, the incoming signals are first taken up by the dendrites and they are then passed on to the axons via the neuron body. 

Image result for The direction of impulse in a typical neuron is

So, the correct answer is 'Dendron to axon'. 

The integral component of the nervous tissue is 

zoology structural organization in living organisms specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. Axon

  2. Neuron

  3. Cyton

  4. None of the above

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Correct Option: B
Explanation:
The nervous system has a function in the control and coordination of the body. It consists of nervous tissue. Nervous tissues contain highly specialized cells called neurons or nerve cells. 
So, the correct answer is 'Neurons'.