12th Grade > Biology
NEURAL CONTROL AND COORDINATION MCQs
Total Questions : 57
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Answer: Option A. -> Sensory crista of the ampulla
:
A
The inner ear also contains a complex system called vestibular apparatus, located above the cochlea. The vestibular apparatus is composed of three semi-circular canals.The base of canals is swollen and is called ampulla, which contains a projecting ridge called crista ampullaris which has hair cells. The saccule and utricle contain a projecting ridge called macula. The crista and macula are the specific receptors of the vestibular apparatus responsible for maintenance of balance of the body and posture.
:
A
The inner ear also contains a complex system called vestibular apparatus, located above the cochlea. The vestibular apparatus is composed of three semi-circular canals.The base of canals is swollen and is called ampulla, which contains a projecting ridge called crista ampullaris which has hair cells. The saccule and utricle contain a projecting ridge called macula. The crista and macula are the specific receptors of the vestibular apparatus responsible for maintenance of balance of the body and posture.
Answer: Option C. -> Repolarisation
:
C
After generation of action potential, the recovery process is called repolarization. The onset of action potential is marked by the opening of voltage-gated Na+channels. The depolarisation that occurs due to thiscauses the neuron membrane to attain a voltage that triggers the opening of voltage-gated K+ channels. Then K+ ions rush out through this channels, reducing the positive charge inside the neuron and causing repolarisation of the neuronal membrane.
:
C
After generation of action potential, the recovery process is called repolarization. The onset of action potential is marked by the opening of voltage-gated Na+channels. The depolarisation that occurs due to thiscauses the neuron membrane to attain a voltage that triggers the opening of voltage-gated K+ channels. Then K+ ions rush out through this channels, reducing the positive charge inside the neuron and causing repolarisation of the neuronal membrane.
Answer: Option B. -> EEG
:
B
An electroencephalogram (EEG) is a test used to detect abnormalities related to electrical activity of the brain. This procedure tracks and records brain wave patterns. Small metal discs with thin wires (electrodes) are placed on the scalp, which sends signals to a computer to record the results.
:
B
An electroencephalogram (EEG) is a test used to detect abnormalities related to electrical activity of the brain. This procedure tracks and records brain wave patterns. Small metal discs with thin wires (electrodes) are placed on the scalp, which sends signals to a computer to record the results.
Question 4. Identify the incorrect statement(s) regarding the components of PNS.
I. The nerves carrying impulses from CNS to peripheral system are Sensory nerves or Afferent nerves
II. The nerves carrying impulses from peripheral system to CNS are Motor nerves or Afferent nerves
III. Sensory system coordinates auditory, visual, touch receptors etc.
IV. Motor system coordinates impulses towards effector organs.
I. The nerves carrying impulses from CNS to peripheral system are Sensory nerves or Afferent nerves
II. The nerves carrying impulses from peripheral system to CNS are Motor nerves or Afferent nerves
III. Sensory system coordinates auditory, visual, touch receptors etc.
IV. Motor system coordinates impulses towards effector organs.
Answer: Option A. -> I and II
:
A
In reference to the statements; I and II are incorrect because :
1. Afferent nerve fibres carry impulses from the receptors to the CNS. They are also called sensory nerves because they bring in sensory information to the CNS.
2. Efferent nerve fibres conduct nerve impulses from the CNS to the effector organs such as muscles and glands. They are also called motor nerves because they carry information from the CNS for motor response.
:
A
In reference to the statements; I and II are incorrect because :
1. Afferent nerve fibres carry impulses from the receptors to the CNS. They are also called sensory nerves because they bring in sensory information to the CNS.
2. Efferent nerve fibres conduct nerve impulses from the CNS to the effector organs such as muscles and glands. They are also called motor nerves because they carry information from the CNS for motor response.
Question 5. Match the spinal nerves mentioned in column I with the number listed in column II and select the right answer containing the correct matching of the alphabets of the two columns
Column I-Column -IISpinal nervesNumberALumber nervese1 pairBCervical nervesf12 pairsCThoracic nervesg8 pairs h5 pairs
Column I-Column -IISpinal nervesNumberALumber nervese1 pairBCervical nervesf12 pairsCThoracic nervesg8 pairs h5 pairs
Answer: Option D. -> A=h, B=g, C=f
:
D
In humans, there are 31 pairs of spinal nerves, one of each pair present on either side of thevertebral column.These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine. There are eight pairs ofcervical nerves, twelve pairs ofthoracic nerves, five pairs oflumbar nerves, five pairs ofsacral nerves, and one pair ofcoccygeal nerves. The spinal nerves are part of theperipheral nervous system.
:
D
In humans, there are 31 pairs of spinal nerves, one of each pair present on either side of thevertebral column.These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine. There are eight pairs ofcervical nerves, twelve pairs ofthoracic nerves, five pairs oflumbar nerves, five pairs ofsacral nerves, and one pair ofcoccygeal nerves. The spinal nerves are part of theperipheral nervous system.
Answer: Option C. -> Pavlov
:
C
Ivan Petrovich Pavlov was a Russian physiologist known primarily for his work in classical conditioning.Classical conditioning refers to a learning procedure in which a biologically potent stimulus (e.g. food) is paired with a previously neutral stimulus (e.g. a bell).
:
C
Ivan Petrovich Pavlov was a Russian physiologist known primarily for his work in classical conditioning.Classical conditioning refers to a learning procedure in which a biologically potent stimulus (e.g. food) is paired with a previously neutral stimulus (e.g. a bell).
Answer: Option B. -> 1,000 cycles/sec
:
B
Thehuman earcan respond to minute pressure variations in the air if they are in the audible frequencyrange, roughly 20 Hz - 20 kHz. It is capable of detecting pressure variations of less than one billionth of atmospheric pressure.
The hertz is defined as onecycle per second. 20Hz means 20 cycles per second. So the audible frequency range for human ear is 20 cycles per second to 20,000 cycles per second. Thus, even if all the options given fall in this range, a human ear is most sensitive to frequencies between 2000Hz to 5000Hz. Hence, option B is correct i.e. 1000cycles/sec
:
B
Thehuman earcan respond to minute pressure variations in the air if they are in the audible frequencyrange, roughly 20 Hz - 20 kHz. It is capable of detecting pressure variations of less than one billionth of atmospheric pressure.
The hertz is defined as onecycle per second. 20Hz means 20 cycles per second. So the audible frequency range for human ear is 20 cycles per second to 20,000 cycles per second. Thus, even if all the options given fall in this range, a human ear is most sensitive to frequencies between 2000Hz to 5000Hz. Hence, option B is correct i.e. 1000cycles/sec
Answer: Option A. -> Fourth ventricle
:
A
Thecentral canal, also known asependymal canal, is thecerebrospinal fluid-filled space that runs longitudinally through the length of the entirespinal cord. The central canal is continuous with theventricular systemof thebrain. Thefourth ventriclenarrows at a region called theobexto become the central canal of the spinal cord.
:
A
Thecentral canal, also known asependymal canal, is thecerebrospinal fluid-filled space that runs longitudinally through the length of the entirespinal cord. The central canal is continuous with theventricular systemof thebrain. Thefourth ventriclenarrows at a region called theobexto become the central canal of the spinal cord.
Answer: Option B. -> 31
:
B
Aspinal nerveis a mixednerve, which carries motor, sensory, and autonomic signals between thespinalcord and the body. In humans, there are 31 pairs ofspinal nerves, one of eachpair present on either side of the vertebral column.
:
B
Aspinal nerveis a mixednerve, which carries motor, sensory, and autonomic signals between thespinalcord and the body. In humans, there are 31 pairs ofspinal nerves, one of eachpair present on either side of the vertebral column.
Answer: Option C. -> Cervical nerves ⇒ Thoracic nerves ⇒ Lumbar nerves ⇒ Sacral nerves
:
C
The spinal nerves are named according to where it emerges and passes through the bones in the spinal vertebrae.
1. 8 cervical (C1-C8) nerves emerge from the cervical spine; cervical means of the neck(there are 8 cervical nerves, but only 7 cervical vertebrae).
2. 12 thoracic (T1-T12) nerves emerge from the thoracic spine; thoracic means of the chest.
3. 5 lumbar (L1-L5) nerves emerge from the lumbar spine; lumbar means from thelower back region.
4. 5 sacral (S1-S5) nerves emerge from the sacral bone; sacral means of the sacrum, the bony plate at the base of the vertebral column.
5.1 coccygeal nerve emerges from the coccygeal bone; coccygeal means of the coccyx, the tailbone.
:
C
The spinal nerves are named according to where it emerges and passes through the bones in the spinal vertebrae.
1. 8 cervical (C1-C8) nerves emerge from the cervical spine; cervical means of the neck(there are 8 cervical nerves, but only 7 cervical vertebrae).
2. 12 thoracic (T1-T12) nerves emerge from the thoracic spine; thoracic means of the chest.
3. 5 lumbar (L1-L5) nerves emerge from the lumbar spine; lumbar means from thelower back region.
4. 5 sacral (S1-S5) nerves emerge from the sacral bone; sacral means of the sacrum, the bony plate at the base of the vertebral column.
5.1 coccygeal nerve emerges from the coccygeal bone; coccygeal means of the coccyx, the tailbone.
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