Biology

Nervous System Physiology

1,858 Questions

Enhance your knowledge of human neurobiology through questions on nervous system physiology. The topics cover brain anatomy, sensory modalities, and the neural mechanisms controlling speech and language. This resource is ideal for students preparing for medical and general science exams.

Brain anatomy and regionsNeural mechanismsLanguage processingSensory functions

Nervous System Physiology Questions

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

Cerebrospinal fluid is present

  1. Beneath the pia mater

  2. Between pia mater and arachnoid mater

  3. Between arachnoid and dura mater

  4. In extra dura mater

  5. Between the dura mater and cranium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cerebrospinal fluid (CSF) is a clear, colorless body fluid found in the brain and spine. It is located in the subarachnoid space between the arachnoid mater and the pia mater. It acts as a cushion for the brain's cortex by providing mechanical and immunological protection to the brain inside the skull. Hence option B is correct.

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

The cerebrospinal fluid passes out from the ventricle of medulla oblongata into the space between meninges of brain through

  1. Foramen of Monro

  2. Foramen of magnum

  3. Foramen of Magendie and Luschka

  4. Foramen ovale
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The CSF flows from the fourth ventricle of the medulla oblongata into the subarachnoid space through the median aperture (Foramen of Magendie) and the two lateral apertures (Foramina of Luschka).

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

Fluid present in and around the central nervous system is

  1. Cerebral fluid

  2. Cerebrospinal fluid

  3. Spinal fluid

  4. Tissue fluid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The central nervous system consists of the brain and the spinal cord. The cavities of the central nervous system are called the ventricles that are lined with the choroid plexus. The choroid plexus is made up of the inserted piamater, blood vessels, the ependymal cells. It is responsible for the formation of the formation of the extracellular fluid called the cerebrospinal fluid which drains the ventricles of the brain and spinal cord. The CSF returns to blood via the arachnoid villi.

Hence, the correct answer is 'Cerebrospinal fluid'

Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc
Medulla oblongata controls involuntary functions.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Medulla oblongata is the part of hindbrain. It is located in the brainstem, anterior to the cerebellum. It controls the involuntary functions . It is linked to the autonomic system and has cardiac, respiratory, vomiting and vasomotor centres. It also controls breathing heart rate and blood pressure.

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

Which one of the following is the complex reflex activity?

  1. Swallowing the food bolus is a complex reflex activity controlled by olfactory lobe of brain

  2. Chewing is controlled by somatic nerves, which is complex reflex activity.

  3. Swallowing the food bolus is a complex reflex activity controlled by medulla oblongata.

  4. Secretion of saliva is a conditional reflex activity.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Reflex actions are involuntary actions that are either performed when learnt or innately performed. A complex reflex action is made up of a polysynaptic pathway, wherein, more than one synaptic junctions are involved. Swallowing of food bolus is a reflex activity that involves a polysynaptic pathway and is under reflexive or involuntary control. This stage of the swallow begins after food which has been masticated has been gathered together in the mouth and formed into a bolus which is passed from the posterior tongue. It is controlled by medulla oblongata.

Hence, the correct answer is 'Swallowing the food bolus is a complex reflex activity controlled by the medulla oblongata'.

Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

Respiratory rhythm centre is present:-

  1. Cerebrum

  2. Cerebellum

  3. Medulla

  4. Pons
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation
  • The respiratory center is located in the medulla oblongata and pons, in the brainstem.
  • The respiratory center is made up of three major respiratory groups of neurons, two in the medulla and one in the pons. It is responsible for generating and maintaining the rhythm of respiration.
  • Hence Respiratory rhythm center is present Medulla and pons.
  • So, the correct answer is 'Medulla and Pons.
Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

The respiratory centre of the brain is located in 

  1. Medulla oblongata

  2. Pons

  3. Cerebellum

  4. Cerebrum
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

Respiratory centres generate rhythmic pattern of breathing and are present in brain stem. The medullary respiratory centres constitute the primary respiratory centre and include two aggregates of neuronal cell bodies namely dorsal respiratory group and ventral respiratory group. They serve to provide output to respiratory muscles. Pontine respiratory centres are present in higher in brain stem in pons and are namely pneumotaxic centre and apneustic centre. Pontine respiratory centres modify the output from medullary centres.

Cerebellum serves to coordinate the voluntary movements of skeletal muscles as well as posture, balance and equilibrium. Cerebrum is the largest and uppermost division of brain.
It is the centre for higher thought processes required for learning, memory, language and speech. 
Therefore, the correct answer is option A and B.

Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

The pneumotoxic and respiratory rhythm centres are respectively present in.

  1. Pons and medulla oblongata

  2. Corpus callosum and pons

  3. Medulla oblongata and hypothalamus

  4. Diencephalon and pons
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pneumotaxic center is located in the pons, while the respiratory rhythm center is primarily located in the medulla oblongata.

Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

Central chemoreceptors are found in

  1. Pons

  2. Medulla

  3. Spinal cord

  4. Cerebrum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Central chemoreceptors are located on the ventrolateral medullary surface in the central nervous system. There receptors act to detect the changes in pH of their environment by detecting alteration in the concentration of O$ _2$ and CO$ _2$ of nearby cerebrospinal fluid. The decrease in CO$ _2$ causes the blood to become more acidic while it's increase makes the blood alkaline
So, the correct answer is 'Medulla'.