SCIENCE(3) Flashcards
COORDINATED FUNCTIONS: NERVOUS SYSTEM
the organ system which performs many functions in the body, mostly for control and regulation.
nervous system
The Nervous System is divided into two main divisions
Central Nervous System
Peripheral Nervous System
is the main organ of the nervous system which receives impulses from the body, processes data, initiates appropriate responses to stimuli and regulates and maintains homeostasis in the body.
Brain
The brain is divided into three main parts:
the cerebrum, cerebellum and brain stem.
controls voluntary movements. Considered the largest part of the brain. It is divided into left and right hemispheres.
cerebrum
responsible for sensations and movements of the right side of the body.
left hemispheres
is responsible for sensations and movements of
the left side of the body.
right hemispheres
Where two hemispheres communicate through
corpus callosum
responsible for speech, analysis and reasoning
left hemispheres
usually excels in mathematics, science and logic
left-brain dominant person
excels in aesthetics, music, arts and in visual and spatial analyses.
right brain dominant person
Each cerebral hemisphere is divided into four lobes:
Frontal, Temporal, Occipital and Parietal
is at work when you talk, move, reason out, and problem solving.
Frontal lobe
the center for vision
Occipital lobe
distinguishes for sensations such as touch, pain, pressure and temperature
Parietal lobe
allows you to hear, sequencing and organization and memory.
Temporal lobe
is the second largest part of the brain and is located behind the brain stem. It coordinates movements & controls balance.
cerebellum
communicates the brain with the spinal cord. It coordinates many survival functions of the body such as breathing, heart rate, sleep and wakefulness.
brain stem
is connected to the spinal cord, regulates breathing and heartbeat.
Medulla Oblongata
a small structure that connects the cerebrum and medulla oblongata.
pons
is the control center of the homeostasis of the internal environment. Regulates body temperature and manages emotions and sensations like thirst and hunger.
Hypothalamus
serves as messenger since integrates the sensory and motor impulses.
Thalamus
is a long bundle of nerves and cells that extends from the lower portion of the brain to the lower back.
spinal cord
is an automatic response to a stimulus that does not need thought or thinking, like when you pull away your hand when you touched a hot surface.
Reflex