Tag: structure and function of brain

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Questions Related to structure and function of brain

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Which of the following body part has more number of bone that others?

  1. Skull

  2. Chest

  3. Forelimb

  4. Pelvis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The human skeleton is the internal framework of the body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together. 

So, the correct option is ‘Skull’.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

The term "grey matter" refers to

  1. neurons that are unmyelinated

  2. axons that are myelinated

  3. dendrites that are myelinated

  4. neurons that are myelinated
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The grey matter is mainly composed of neuronal cell bodies and unmyelinated axons. In the grey matter, these axons are mainly unmyelinated, meaning they are not covered by a whitish-coloured, fatty protein called myelin. The grey matter serves to process information in the brain.

So, the correct answer is 'neurons that are unmyelinated'.
Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Different portions of the brain are responsible for specific functions.

  1. True

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

Different regions of the brain are responsible for specific functions. For example, the medulla oblongata is responsible for regulating heart beat and many other involuntary actions. The Broca region is responsible for speech and language etc. So, the correct answer is option A.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans
The central nervous system consists of the brain and spinal cord.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The central nervous system is responsible for integrating sensory information and responding accordingly. It consists of two main components:
  1. The spinal cord serves as a conduit for signals between the brain and the rest of the body. It also controls simple musculoskeletal reflexes without input from the brain.
  2. The brain is responsible for integrating sensory information and coordinating body function, both consciously and unconsciously. 
Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

The largest number of neurons are found in

  1. Brain

  2. Retina

  3. Spinal cord

  4. Tongue
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Retina forms the innermost layer of eyeball and mainly contains rods and cones, the photoreceptors, along with nerve fibres. 

Tongue is a muscular organ, composed of skeletal muscles, to help change its shape and support the movement. Main function of central nervous system (brain and spinal cord) is to integrate the sensory inputs from internal and external environment as received by sensory neurons and process and finally transmit the nerve impulses to effectors (muscles and glands). Thus, being the centre of processing information, brain has maximum number of neurons followed by spinal cord. 
Therefore, the correct answer is option A.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

The appetite and satiety centres in the brain of man are located in the region of the 

  1. Cerebral hemisphere

  2. Cerebellum

  3. Medulla oblongata

  4. hypothalamus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The human brain is divided into three major parts they are forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum, thalamus, and hypothalamus. Cerebrum forms a major part of the human brain. A deep cleft divides the cerebrum longitudinally into two halves, which are termed as the left and right cerebral hemispheres. The appetite and satiety centers in the brain of man are located in the region of the cerebral hemisphere.
So, the correct answer is cerebral hemisphere'.