5 Questions
What are the three main parts of the brain?
Cerebrum, cerebellum, brain stem
What are the four lobes of the cerebrum?
Frontal, parietal, occipital, temporal
What is the responsibility of the cerebellum?
Movement and coordination, balance
What are the three parts of the brain stem?
Mid brain, pons, medulla oblongata
What are the two types of nerves in the Peripheral Nervous System?
Sensory (afferent), motor (efferent)
Study Notes
- Brain is the most sensitive organ in the body, responsible for various functions including physical activity, logical problem-solving, emotions, feelings, and creativity. It never sleeps.
- The brain is protected by the skull.
- The brain can be divided into three main parts: cerebrum, cerebellum, and brain stem.
- Cerebrum is the largest part of the brain, further divided into right and left hemispheres, each with four lobes: frontal, parietal, occipital, and temporal. Each lobe performs distinct functions.
- Cerebellum is responsible for movement and coordination, providing sense of balance and preventing falls.
- Brain stem includes mid brain, pons, and medulla oblongata, controlling involuntary actions like breathing, heart rate, and blood pressure.
- Nervous system is the system that includes the brain.
- Structurally, nervous system is classified into Central Nervous System (CNS) and Peripheral Nervous System (PNS).
- CNS consists of the brain and spinal cord, with the spinal cord connecting the brain to PNS.
- PNS is a network of nerves spread across the body, acting as a highway connecting the body with CNS.
- PNS has two types of nerves: sensory (afferent) and motor (efferent).
- Neuron is the basic unit of the nervous system, transmitting electrical signals to the brain.
- A neuron has three parts: dendrites, soma (cell body), and axon.
- Dendrites receive input from other nerve cells.
- Soma or cell body contains the nucleus.
- Axon transmits electrical responses to other neurons.
- Nervous system consists of 43 pairs of nerves, with 12 cranial nerves originating in the brain and 31 spinal nerves originating from the spinal cord.
Test your knowledge of the brain, nervous system, and its components including the cerebrum, cerebellum, brain stem, neurons, and the classification of the central and peripheral nervous systems.
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