Tag: life processes: control and coordination

Questions Related to life processes: control and coordination

Different portions of the brain are responsible for specific functions.

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

  1. True

  2. False

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Correct Option: A
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.

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

  1. True

  2. False

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Correct Option: A
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. 

Brains can work 24 hours a day with no rest.

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

  1. True

  2. False

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Correct Option: B
Explanation:
Brains are a part of human beings, which controls all the functions of the body. Our brain needs rest every day, without which body functions will be hampered. So, the correct answer is option B.

The largest number of neurons are found in

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

  1. Brain

  2. Retina

  3. Spinal cord

  4. Tongue

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Correct Option: A
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.

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

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

  1. Cerebral hemisphere

  2. Cerebellum

  3. Medulla oblongata

  4. hypothalamus

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Correct Option: A
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'.

Power of regeneration is lowest in

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

  1. Brain cell

  2. Liver cell

  3. Bone cell

  4. Muscle cell

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Correct Option: A
Explanation:

Brain cells remain in the beginning stage of interphase of cell reproduction for their life, and never divide, and instead develop by forming new synapses with other neurons. They lack cellular machinery for cell division. So, the correct answer is option A. 

Deficiency of oxygen affects mainly the 

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

  1. Brain

  2. Skin

  3. Kidney

  4. Intestine

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Correct Option: A
Explanation:

Brain cells are extremely sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death. 

Name which part is often referred to as the emotional brain?

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

  1. Cerebellum

  2. Cerebrum

  3. Central Nervous System

  4. Limbic System

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Correct Option: D
Explanation:

  • The limbic system often referred to as the "emotional brain", is found buried within the cerebrum. 
  • Like the cerebellum, evolutionarily the structure is rather old. This system contains the thalamus, hypothalamus, amygdala, and hippocampus. 

Therefore, the correct answer is option D.

Cerebral cortex is divided into sections like_____________

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

  1. Left and right lobe

  2. Thalamus and hypothalamus

  3. Frontal, parietal, occipital and temporal lobes

  4. None of these

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Correct Option: C
Explanation:

The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called "lobes". The frontal lobe, parietal lobe, occipital lobe, and temporal lobe. 

Therefore, the correct answer is option C.

Which part of the brain converts short term memory to permanent memory? 

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

  1. Amygdala

  2. Thalamus

  3. Mid-brain

  4. Hippocampus

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Correct Option: D
Explanation:

  • Hippocampus is the portion of the cerebral hemispheres in basal medial part of the temporal lobe. 
  • This part of the brain is important for learning and memory, for converting short term memory to more permanent memory and for recalling spatial relationships in the world about us. 

Therefore, the correct answer is option D.