Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

Power of regeneration is lowest in

  1. Brain cell

  2. Liver cell

  3. Bone cell

  4. Muscle cell
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

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

Deficiency of oxygen affects mainly the 

  1. Brain

  2. Skin

  3. Kidney

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

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

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

  1. Cerebellum

  2. Cerebrum

  3. Central Nervous System

  4. Limbic System
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Cerebral cortex is divided into sections like_____________

  1. Left and right lobe

  2. Thalamus and hypothalamus

  3. Frontal, parietal, occipital and temporal lobes

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Amygdala

  2. Thalamus

  3. Mid-brain

  4. Hippocampus
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

.................. is a part of the brain involved in memory, emotion and fear.

  1. Amygdala

  2. Limbic System

  3. Thalamus

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

  • Amygdala is a part of the telencephalon, located in the temporal lobe, involved in memory, emotion, and fear. 
  • The amygdala is both large and just beneath the surface of the front, medial part of the temporal lobe where it causes the bulge on the surface called the uncus. 
  • This is a component of the limbic system. 

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

Information from the ear first enters the .......... of the brain.

  1. Medulla

  2. Pons

  3. Brain stem

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

  • Pons is a part of the metencephalon in the hindbrain. It is involved in motor control and sensory analysis. 
  • For example, information from the ear first enters the brain in the pons. It has parts that are important for the level of consciousness and for sleep. 
  • Some structures within the pons are linked to the cerebellum, thus are involved in movement. 

Therefore, the correct answer is option B.

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

Outermost covering of brain is 

  1. Piamater

  2. Duramater

  3. Choroid

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

The meninges are the layers that are closely present around the brain. The dura mater is an outermost tough and fibrous layer. It closely lines the cranium. It is followed by the arachnoid mater that forms the middle meninx. The piamater is the innermost meninx which adheres closely to the surface of the brain. It is highly vascular due to the rich supply of the blood vessels. So, it provides oxygen and nutrients to the cells of the brain. 

Hence, the correct answer is 'Duramater'