Topics in BiologyTropical savanna explained with its characteristics Ecological pyramid explained with its importance and limitations Hindbrain: Medulla Oblongata and its features Food web explained with examples Biology Scheme of Work, SS1, First Term Biology Scheme of Work, SS1, 2nd Term Biology Scheme of Work, SS1, 3rd Term Male accessory sex organs: Seminal vesicles and bulbourethral glands Scrotum and its contents: Testicles Brain: Introduction to the human brain Forebrain: Lobes of the cerebrum and their functions Cerebellum: Parts and functions of the cerebellum Midbrain: Division and functions of the midbrain Negative feedback mechanism in homeostasis Arterial disorders explained with their causes Types of desert and their characteristics Characteristics of tropical rainforest Swamp forest: What are swamp forests? Characteristics of swamp forests Savanna biome: Concept of the savanna
Academic Questions in Biology
In a food chain, the primary consumers are classified under trophic level _____.
Cold blooded animals are referred to as _____.
F. None of the above
All reptiles are vertebrates.
_____ cells are responsible for the formation of osteoblasts.
_____ is a bone that constitute the axial skeleton.
Which of the following is false concerning cartilages and bones?
A diagram showing the movement of energy through a food chain is called a _____.
Which of the following is NOT a part of the wrist bones (or carpal bones)?
LEN ACADEMY SMART SCHOOL SOFTWARE
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The cerebellum is a part of the brain that plays a vital role in the body's voluntary and physical movements. It is located at the posterior part of the brain, just below the occipital and temporal lobes of the cerebrum. It is also located posteriorly just at the same level as the pons. This is shown in the image below:
The cerebellum (sometimes referred to as the little brain) accounts for approximately 10% of the brain's size and it consists of almost half of the brain cells or neurones.
The cerebellum is divided in its midline into two cerebellar hemispheres by a structure called vermis. This is shown in the image below:
The surface of the cerebellum is referred to as the cerebellar cortex and it is composed of gray matter.
The cerebral medulla is located underneath the cerebellar cortex and it is made up of white matter. Embedded within the white matter are the 4 cerebellar nuclei. These are:
The cerebellum is lobed and this gives its surfaces a distinctive appearance. It can therefore be divided into 3 lobes. These are:
The flocculonodular and anterior lobes can been seen above the primary fissure while the posterior lobe lies below the primary fissure. This is shown in the image below:
Often times, the signals coming into the cerebrum are immediately processed and directed out as output via an appropriate nerve. This rapid process is termed feedforward processing.
Feedforward processing implies that the internal transmission of nervous impulses within the cerebellum is minimal.
Functionally, the cerebellum receives sensory information from the spinal cord and other parts of the brain (e.g midbrain). It also regulates the motor movements of the body, thereby bringing about proper coordination, balance, posture and speech. For this reason, the cerebellum is often considered as a motor structure since cerebellar damages can lead to impairments in motor function like movement and posture.
Interestingly, the examination of damages to the cerebellum has proven to be the most important clues to its function.
When the cerebellum becomes damaged in humans or animals, they tend to show problems associated with motor functions. To this end, precision movements are lost in such animals or humans. Also they begin to show an uncoordinated, random, or poorly timed muscular activities and movements.
It coordinates voluntary movement of the body and muscular activity.
It coordinates posture and balance in humans. A typical example of an impairment on this function is seen during the intake of alcohol. The person involved loses balance because alcohol impairs the coordination of posture and balance by the cerebellum.
Please read on the homeostasis here.
The cerebellum is crucial in learning new skills (that is; motor learning) through a trial and error process. Such skills will include learning to ride a bicycle or throwing a ball into a basketball net.
You can read on the game of basketball here.
It controls speech and bodily coordination.
The cerebellum plays an active role in cognitive functions like memory and learning.
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Amazing facts in Biology
99% of a panda's diet is bamboo. They may eat fish or other small animals occasionally
When attacked by insects, lima beans plant will often command parasitic wasps to their defence.
When the leaves of the lima bean's leaves are eaten by insects, the plant gives off a substance that signals parasitic wasps to swam in, destroying its enemies (the leaf-eating insects) in the process
Frogs drink water through their skin
Armadillos are western mammals known for their unique armor-like shell which are bulletproof
Although zebras are known for their characteristics black and white stripes, we still have some polka-dotted zebras
Charles Darwin is a British naturalist and biologist who contributed greatly into the study of evolution. According to research, he frequently ate the animals he studied
Lungs are the only human organ that can float on water
Unlike most snakes that lay eggs, anacondas give birth to live babies
A shrimp's heart is in its head
Women have more pain receptors than men
NOTABLE POINTS IN Biology
For a thing to be considered living, it must possess all the basic characteristics of life. These include:
Irritability or Sensitivity
During strenuous exercises like sprinting or running, your body may actually work in the shortage of oxygen. During this time, your body owes oxygen (called oxygen debt) and it must be replenished or repayed after the exercise is stopped. This is why you breathe excess of oxygen after you stopped the exercise.
This is the concept of anaerobic respiration
A food chain is a diagram that shows the relationship between plants and animals within a habitat on the basis of how they rely on each other for food.
Note: Habitat is a place where an organism live. It is of three types:
The term Biology originated from two Greek words. They are:
Bios: means life.
Logos: means knowledge or to study.
Biology can therefore be defined as the study of life
Anything that has life is generally considered as a living organism (or organism). All living organisms must be able to carry the following activities:
Irritability or Sensitivity
The above listed points are often regarded as the basic characteristics of life. You can memorize them using the acronym -> MR. NIGER DAC.
The gas used in the manufacture of food by plants is Carbon dioxide or Carbon(IV)oxide or CO2
Plants manufacture food through a process called photosynthesis.
It is noteworthy to state that plants are the only orgnisms that take away CO2 from the atmosphere