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

The Iter of the vertebrate brain is the part of

  1. mesencephalon

  2. metencephalon

  3. diencephalon

  4. myelencephalon

  5. telencephalon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mesencephalon or midbrain is a part of the brain stem. It is associated with vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature control. A tubular passage, iter is the passage from the third ventricle of the brain to the infundibulum.

Multiple choice

Where are chemoreceptors located?

  1. Cerebellum

  2. Outside CNS

  3. Medulla oblongata

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

Chemoreceptors are located outside CNS and are responsive to changes in blood O2, CO2 and hydrogen ion concentration.

Multiple choice

_______ is the largest part of the brain.

  1. Cerebellum

  2. Cerebrum

  3. Ventricles

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

The cerebrum is the largest part of the human brain, accounting for about 85 percent of the brain's weight. It is responsible for higher brain functions such as thought, action, and emotion.

Multiple choice

Which of the following statements regarding the human brain is INCORRECT?

  1. Abnormalities of blood flow in the carotid arteries causes problems in the subcortical structures.

  2. Abnormalities of blood flow in the vertebral arteries cause problems in the brainstem.

  3. Formation of a local thrombus is one of the commonest causes of blood flow problems in the brain.

  4. At the base of the brain lies the circle of Willis.

  5. The carotid arteries form the posterior circulation to the brain.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The carotid arteries form the anterior circulation to the brain, whereas the vertebral arteries merge to become the basilar artery (so called vertebrobasilar system), which constitutes the posterior circulation.

Multiple choice

Which among the following structures are not found in the Circle of Willis?

  1. The basilar artery

  2. The anterior cerebral artery

  3. The anterior communicating artery

  4. The internal carotid artery

  5. The posterior communicating arteries
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It arises from the confluence of the two vertebral arteries at the junction between the medulla oblongata and the pons. The basilar artery and middle cerebral arteries, supplying the brain, are not considered a part of the circle.