Tag: zoology

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Questions Related to zoology

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

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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The 3rd cranial nerve is the Oculomotor nerve, the 6th is the Abducens nerve, and the 11th is the Accessory (spinal accessory) nerve.

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

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
Reveal answer Fill a bubble to check yourself
A Correct answer
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).

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

The vagus nerve is the _______ cranial nerve.

  1. $7^{th}$
  2. $5^{th}$
  3. $10^{th}$
  4. $9^{th}$
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birds are characterized by pneumatic (hollow) bones, lungs with air sacs for efficient respiration, four-chambered hearts, homeothermy (warm-bloodedness), feathers, and a crop/gizzard for digestion. Scales are generally found on the legs of birds, but are not exclusive to them (reptiles also have scales).

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

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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'. 

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

The integral component of the nervous tissue is 

  1. Axon

  2. Neuron

  3. Cyton

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.