Neural Control and Coordination Test

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Neural Control and Coordination Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

Select the incorrect option regarding the given figure of a neuron with its parts labelled as P, Q, R, S and T.

A
Part P of this neuron connects with part T of another neuron.

B
Part R is formed by wrapping of a special cell around S of the neuron.

C
Part Q is central vacuole that contains signal transmitting compounds.

D
Part P receives signals and part T carries signals out of the neuron.
Question 2
1 / -0

An investigator places an isolated neuron in a calcium-free medium, gives the neuron a suprathreshold stimulus and then performs an assay to test whether neurotransmitter is released into the medium. Which of the following outcomes would you predict?

A
No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release.

B
No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential.

C
Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold.

D
We cannot predict the outcome without knowing whether the neuron was myelinated or non-myelinated.

Solution

The influx of Calcium ions is responsible for the release of neurotransmitters from the synaptic vesicles. Since the medium lacks calcium, the release of neurotransmitters does not take place and hence no neurotransmitter is detected.
Hence the correct option is A.
Question 3
1 / -0

In human brain two hemispheres are connected by bundle of fiber which is know as _______________.

A
Medulla oblongata

B
Cerebrum

C
Cerebellum

D
Corpus callosum
Solution
- In the human brain two hemispheres are connected by a bundle of fiber which is known as the corpus callosum. It is a large white matter.
- The main function of the corpus callosum is that it allows us to perceive depth and enables the two hemispheres of the brain to communicate with each other.
- The corpus callosum lies deep to the cingulate gurus.
So, the correct answer is D.
Question 4
1 / -0

If medulla oblongata is destroyed then which of the following functions will be affected?

A
No thermoregulation

B
No vision

C
No response when prickled with needles

D
No memory

Solution

Medulla oblongata is an essential role in passing messages between the spinal cord and brain. It's also essential for regulation of cardiovascular and respiratory systems. If it gets damaged then respiratory failure, paralysis or loss of sensation can take place.
So, option C is the correct option.
Question 5
1 / -0

One of the examples of the action of the autonomous nervous systems

A
Pupillary reflex

B
Swallowing of food

C
Peristalsis of the intestines

D
Knee-jerk response

Solution

Pupillary diameter, which is primarily under the control of the autonomous nervous systems.
So, the correct option is 'Pupillary reflex'.
Question 6
1 / -0

If parasympathetic nerve of the human is cut then heart beat -

A
Unaffected

B
Decreases

C
Increases

D
Stop

Solution

The parasympathetic nerve with spinal ganglionic nerves mediates the lowering of the heart rate. So if the parasympathetic nerve of human is cut or damaged it will result in an increase of heart rate which will result in an increase in heartbeat per minute.
So, the correct answer is 'Increase'
Question 7
1 / -0

Retina cells are sensitive to :

A
Smell

B
Light

C
Taste

D
Touch

Solution

Retina cells are sensitive to light and dark changes, shape and contain two types of light sensitive pigments
So, the correct option is 'Light'
Question 8
1 / -0

Which part of the eye is grafted in a needy patient from a donated eye?

A
Conjunctiva

B
Cornea

C
Choroid

D
Ciliary muscles

Solution

When eye is donated or transplanted only cornea part of the eye is transplanted to the needy person.
The cornea is a contact lens sized, clear piece of tissue in the front of the eye.
So the correct option is 'Cornea'
Question 9
1 / -0

Cerebral hemispheres are the centres of

A
Taste

B
Smell

C
Balance

D
Thinking

Solution

The cerebellum controls the timing and pattern of the muscle activation during movement. The main function of the cerebellum receives information from the sensory system, the spinal cord, and other parts of the brain and then regulates motor movements. The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.
So, the correct option is 'thinking'.
Question 10
1 / -0

Which of the following is not an effect produced by parasympathetic stimulation?

A
Dilation of the pupils

B
Increased saliva production

C
Increased stomach activity

D
Constriction of the bronchi

Solution

The parasympathetic nervous system decreases respiration and heart rate and increases digestion. Stimulation of the parasympathetic nervous systems results in the construction of pupils. Decrease heart rate and blood pressure.
So, the correct option is 'Dilation of pupil'.

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Neural Control and Coordination Test - 53

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Neural Control and Coordination Test - 53

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Question 1

Part P of this neuron connects with part T of another neuron.

Part R is formed by wrapping of a special cell around S of the neuron.

Part Q is central vacuole that contains signal transmitting compounds.

Part P receives signals and part T carries signals out of the neuron.

Question 2

No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release.

No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential.

Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold.

We cannot predict the outcome without knowing whether the neuron was myelinated or non-myelinated.

Solution

Question 3

Medulla oblongata

Cerebrum

Cerebellum

Corpus callosum

Solution

Question 4

No thermoregulation

No vision

No response when prickled with needles

No memory

Solution

Question 5

Pupillary reflex

Swallowing of food

Peristalsis of the intestines

Knee-jerk response

Solution

Question 6

Unaffected

Decreases

Increases

Stop

Solution

Question 7

Smell

Light

Taste

Touch

Solution

Question 8

Conjunctiva

Cornea

Choroid

Ciliary muscles

Solution

Question 9

Taste

Smell

Balance

Thinking

Solution

Question 10

Dilation of the pupils

Increased saliva production

Increased stomach activity

Constriction of the bronchi

Solution

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