Neural Control and Coordination Test

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Neural Control and Coordination Test - 59

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Question 1
1 / -0

Neurilemma is name for:

A
Plasmamembrane of axon

B
Coating formed by myelin sheath

C
Covering of schwann cells

D
Connective tissue covering of nerve fasciculus

Solution

Neurilemma is the outermost covering of Schwann cells that surrounds the axon of a neuron. It is also known as neurolemma.
Thus, the correct answer is 'Covering formed by Schwann cells.'
Question 2
1 / -0

The peripheral nervous system transmits messages to and from the sense organs and is responsible for

A
Involuntary actions

B
Reflex actions

C
Autonomic actions

D
Voluntary actions
Solution
- The nervous system comprises two parts, namely the central nervous system (brain and spinal cord) and the peripheral nervous system (nerve networks).
- The peripheral nervous system is divided into two parts, the somatic nervous system, and the autonomic nervous system.
- Sensory nerves transmit messages to and from the sense organs.
- The autonomic nervous system controls involuntary actions such as heartbeat, respiration, digestion, and blood pressure.
Thus, the correct answer is 'Involuntary actions.'
Question 3
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All of the following are correct statements about non-medullated nerve fibres, except

A
It is enclosed by Schwennlls that do not form a myelin sheath around axons

B
It is found in spinal and cranial nerves

C
It is commonly found in autonomous and somatic neural system

D
Both (A) & (B)

Solution

Non-medullated nerve fibres are unmyelinated nerve fibres enclosed by the Schwann cells and do not form a myelin sheath around axons. It is commonly found in autonomous and somatic neural system. Myelinated axons are found in spinal and cranial nerve.
So, the correct option is 'it is found in spinal and cranial nerve'.
Question 4
1 / -0

Centrosome includes a pair of centrioles that help in cell division by spindle formation. The non-dividing cells in human are

A
Chondrocytes

B
Epithelial cells

C
Neurons

D
Neuroglial cells

Solution

A. Chondrocytes are the cells that are found in cartilage. These cells can divide forming a nest of 2-4 cells.
B. Epithelial cells are the cells lining the surfaces of the body. These cells can also divide by mitosis.
C. Neurons or the nerve cells are the largest cells in the body and found in the nervous system. These cells do not have centrioles and hence, do not undergo cell division.
D. Neuroglial cells are the cells in the central nervous system, other than neurons. These cells are meant for the protection of neurons and can divide by mitosis.
Hence, non-dividing cells in humans are neurons.

So, the correct answer is 'Neurons'.
Question 5
1 / -0

Due to stimulation of sympathetic nervous system?

A
Tear secretion increases

B
Saliva secretion decreases

C
Sweat secretion increases

D
All of the above

Solution

The sympathetic nervous system manifests 'fight or flight' responses. It decreases the tear secretion and saliva secretion but increases sweat secretion. The parasympathetic nervous system increases tear secretion and saliva secretion.
Hence, the correct answer is option C.
Question 6
1 / -0

Which of the following is not a structure of the eye?

A
Conjuctiva

B
Suspensory ligament

C
Basilar

D
Membrane lutea
Solution
- Conjunctiva is the mucous membrane that covers the eye on the front.
- Suspensory ligament emerges from the ciliary body and holds the lens.
- Macula lutea is the spot on the retina for perceiving light.
- So, the correct option is 'Basilar'.
Question 7
1 / -0

How many lobes does the surface of the cerebral hemisphere passes?

A
Two

B
Three

C
Four

D
Six

Solution

The brain of vertebrates is divided into two cerebral hemispheres. These hemispheres are divided by a groove called the longitudinal fissure. Each cerebral hemisphere is further divided into four lobes- the frontal, parietal, temporal, and the occipital lobe.
So, the correct answer is 'Four'.
Question 8
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When a person is suddenly pushed from height by an attacker, his blood pressure and heart rate increase. Control through which centre of brain would normalise his condition?

A
Medulla oblongata

B
Pons

C
Cerebellum

D
Cerebrum

Solution

There are numerous clusters of neurons which control specific activities of the internal organs in the medulla oblongata. Breathing, swallowing, heart rate, blood pressure, and equilibrium all have centres here. These cell clusters are called centres: those concerned with the heart are the cardiac accelerator centre and cardiac depressor centre. The functions of the medulla are so essential to life that serious disease in this area is usually terminal. Breathing, swallowing, heart rate, blood pressure, and equilibrium all have centres here.
So the answer is 'Medulla oblongata'.
Question 9
1 / -0

Which among the following is the part of forebrain?

A
Pons

B
Cerebellum

C
Cerebrum

D
Medulla

E
None of these
Solution
- Pons, cerebellum and medulla oblongata are considered a part of hindbrain forming the brain stem together.
- Cerebrum is the part of forebrain and constitutes four-fifth of brain's weight. The forebrain has sensory regions, which receive sensory impulses from various receptors. It also has motor regions, which control the movement of various muscles such as leg muscles. A certain part of the cerebrum primarily controls intelligence, learning, memory, thinking, and the ability to articulate speech. Some regions of the cerebrum along with hypothalamus are involved in the regulation of sexual behaviour and expression of emotional reactions.
So, the corrrect option is 'Cerebrum'.
Question 10
1 / -0

Hypothalamus is a part of _________.

A
Forebrain

B
Midbrain

C
Hindbrain

D
Cerebellum

Solution

The hypothalamus is a small region of the brain. It's located at the base of the brain, near the pituitary gland. While it's very small, the hypothalamus plays a crucial role in many important functions, including: releasing hormones. regulating body temperature.
So, the correct option is 'Forebrain'.

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Neural Control and Coordination Test - 59

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Neural Control and Coordination Test - 59

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Question 1

Plasmamembrane of axon

Coating formed by myelin sheath

Covering of schwann cells

Connective tissue covering of nerve fasciculus

Solution

Question 2

Involuntary actions

Reflex actions

Autonomic actions

Voluntary actions

Solution

Question 3

It is enclosed by Schwennlls that do not form a myelin sheath around axons

It is found in spinal and cranial nerves

It is commonly found in autonomous and somatic neural system

Both (A) & (B)

Solution

Question 4

Chondrocytes

Epithelial cells

Neurons

Neuroglial cells

Solution

Question 5

Tear secretion increases

Saliva secretion decreases

Sweat secretion increases

All of the above

Solution

Question 6

Conjuctiva

Suspensory ligament

Basilar

Membrane lutea

Solution

Question 7

Two

Three

Four

Six

Solution

Question 8

Medulla oblongata

Pons

Cerebellum

Cerebrum

Solution

Question 9

Pons

Cerebellum

Cerebrum

Medulla

None of these

Solution

Question 10

Forebrain

Midbrain

Hindbrain

Cerebellum

Solution

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