Tag: zoology

Questions Related to zoology

3rd, 6th and 11th cranial nerves are

  1. Optic, facial and accessory spinal

  2. Oculomotor, trigeminal and accessory spinal

  3. Trigeminal, abducens and vagus

  4. Oculomotor, abducens and accessory spinal

Correct Option: D

Cranial nerve showing maximum branching is

  1. Trigeminal

  2. Vagus

  3. Optic

  4. Facial

Correct Option: B

Hypoglossal nerve controls the movements of

  1. Ear

  2. Heart

  3. Tongue

  4. Limbs

Correct Option: C

Vagus nerve is

  1. Sensory tenth cranial nerve

  2. Motor tenth cranial nerve

  3. Mixed tenth cranial nerve

  4. Mixed eleventh cranial nerve

Correct Option: C

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

  1. oculomotor, abducens and accessory

  2. oculomotor, trigeminal and accessory

  3. optic, facial and accessory

  4. trochlear, abducens and vagus

Correct Option: A

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.

  1. $7^{th}$

  2. $5^{th}$

  3. $10^{th}$

  4. $9^{th}$

Correct Option: C

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

  1. 5th cranial nerve

  2. 6th cranial nerve

  3. 9th cranial nerve

  4. 10th cranial nerve

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.

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

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

  3. (a), (b)

  4. (e) only

Correct Option: A

The direction of impulse in a typical neuron is

  1. Axon to dendron

  2. Dendron to axon

  3. Both A and B

  4. None of these

Correct Option: B

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 

  1. Axon

  2. Neuron

  3. Cyton

  4. None of the above

Correct Option: B
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'.