Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
43 Cards in this Set
- Front
- Back
|
The human brain is responsible for...
|
overseeing the daily operations of the human body and for interpreting the vast amount of information it receives.
|
|
|
Weighs an average of ...
|
1.4 kg
|
|
|
Contains approximately
|
100 billion neurons
|
|
|
Brain is dedicated to running the ....
|
body;
|
|
|
brain is responsible for maintaining...
|
homeostasis.
|
|
|
Sensory Receptor:
|
a neuron that is specialized to detect a Stimulus
|
|
|
Mechanoreceptors-
|
respond to movement, pressure, and tension
|
|
|
Photoreceptors (rods and cones)-
|
respond to variations in light
|
|
|
Chemoreceptor-
|
respond to chemicals
|
|
|
Thermoreceptors-
|
respond to changes in temperature
|
|
|
Pain receptors-
|
respond to tissue damage-PAIN!
|
|
|
The Ear
|
is really TWO sense organs in ONE
|
|
|
ears detect
|
sound waves
|
|
|
Ear sense
|
the position of the HEAD, whether it is still, moving in a straight line or rotating
|
|
|
sound is
|
vibrations in the air around us
|
|
|
EARS can distinguish
|
both pitch and loudness of sounds
|
|
|
EYE Sense
|
light
|
|
|
EYES are
|
Composed of THREE LAYERS
|
|
|
The eyes outer layer consists of ? & ?
|
the sclera and cornea
|
|
|
The eyes middle layer contains ?,?,?
|
the CHOROID, CILIARY BODY, and IRIS
|
|
|
EARS can distinguish
|
both pitch and loudness of sounds
|
|
|
EYE Sense
|
light
|
|
|
EYES are composed of
|
THREE LAYERS
|
|
|
The eyes outer layer consists of ? & ?
|
the sclera and cornea
|
|
|
The eyes middle layer contains ?,?,?
|
the CHOROID, CILIARY BODY, and IRIS
|
|
|
The eye's inner layer consists of the
|
Retina
|
|
|
The nose: sense of Smell is a
|
CHEMICAL SENSE,
|
|
|
the cells responsible for smell are specialized chemoreceptor called
|
OLFACTORY RECEPTORS
|
|
|
The tongue: sense of taste is a
|
chemical sense
|
|
|
neurons
|
Specialized Cells
|
|
|
Neurons allow Messages to be carried from one cell to another so
|
that communication among all body parts is smooth and efficient
|
|
|
NEURONS make up the
|
Nervous System
|
|
|
The Central Nervous System (CNS) consists of
|
the Brain and the Spinal Cord
|
|
|
(CNS)-The Spinal Cord carries messages from the body to the Brain, where they are
|
analyzed and interpreted.
|
|
|
(CNS)after the messages are analyzd in the brain Response Messages are then passed
|
from the Brain through the Spinal Cord and to the rest if the Body.
|
|
|
The Peripheral Nervous System (PNS) consists of the neurons NOT included
|
in the Brain and Spinal Cord.
|
|
|
AFFERENT NEURONS
|
Carry impulses from the SENSE ORGANS (RECEPTORS) to the Bain and Spinal Cord
|
|
|
EFFERENT NEURONS
|
Carry impulses from the Brain and Spinal Cord to MUSCLES or GLANDS.
|
|
|
INTERNEURONS-
|
Connect sensory and motor neurons and carry impulses between them. They are found entirely within the Central Nervous System
|
|
|
DENDRITES-
|
short branch extensions spreading out from the cell body. Dendrites Receive STIMULUS and carry IMPLUSES from the ENVIRONMENT or from other Neurons and CARRY THEM TOAWRD THE CELL BODY
|
|
|
AXON-
|
a long fiber that CARRIES IMPULSES AWAY FROM THE CELL BODY
|
|
|
Neurons ONLY have ONE...
|
Axon
|
|
|
4 functions of nervou system
|
1. Gathers information both from the outside world and from inside the body. SENSORY FUNCTION
2. Transmits the information to the processing area of the brain and spinal cord 3. Processes the information to determine the best response. INTEGRATIVE FUNCTION 4. Sends information to muscles, glands, and organs (effectors) so they can respond correctly. Muscular contraction or glandular secretions. MOTOR FUNCTION |
