Science: Chapter 7
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What is the nervous system?
The nervous system receives, processes, stores and transmits information that comes from various parts of the body and the external world.
What is a neuron?
A neuron is a specialized nerve cell in the nervous system that receives and transmits
What is stimulus?
Stimulus is anything that can be perceived by a living organism that can trigger a reaction.
What is a nerve impulse?
A nerve impulse is an electrical signal transmitted by a neuron.
What is a synapse?
A synapse is the transition zone between two neurons that allows a nerve impulse to be transmitted.
What is a nerve?
A nerve is a structure that helps transmit information between the CNS and various regions of the body.
What is the Peripheral Nervous System?
The PNS connects different parts of the body to the CNS.
What is a sensory receptor?
A sensory receptor picks up stimuli and transmits them into nerve impulses.
What are sensory nerves?
Sensory nerves transmit information, in the form of nerve impulses from sensory receptors to the CNS.
What are motor nerves?
Motor nerves transmit impulses from the CNS to the muscles in order to produce voluntary and involuntary movements.
What is the brain?
The brain is composed of parts of the CNS located in the cranium.
What is the cerebrum?
The cerebrum is the control center of voluntary movement, sensory interpretation and intelligence. It is also the center of emotion.
What is the cerebellum?
The cerebellum is the center of balance and movement coordination.
What is the brain stem?
The brain stem is the control center of internal stimuli as well as of involuntary movement.
What is the spinal cord?
The spinal cord is a nervous system organ that carries information from the various parts of the body to the brain. It is also the reflex center.
What is a reflex?
A reflex is a rapid and involuntary reaction to a stimulus.
What is a reflex arc?
A reflex arc is the path taken by a nerve impulse during a reflex.
What is a bone?
A bone is a hard solid organ that forms part of the skeleton.
What are muscles?
Muscles have the ability to contract causing our bodies or our internal organs to move.
What is a joint?
A joint is the junction between two or more bones.
What are the four functions of the nervous system?
A) Receiving information
B) Processing information
C) Stores information
D) Transmits information
What path does the information take starting with the stimulus?
Stimulus→ Sensory Receptors→ Sensory Nerve→ CNS→ Motor Nerve→ Muscles
What are the five functions of the cerebrum?
A) Controls voluntary movement
B) Interprets messages picked up by the senses
C) Controls intelligence
D) Controls emotion
E) Regulates physiological functions
What are the five functions of the bones?
E) Production of blood cells
What are the 5 mechanics of joints?
A) Flexion ----- Extension
B) Adduction ----- Abduction
What are the four functions of muscles?
B) Posture Maintenance
C) Joint Stabilization
D) Heat Release
What are the three types of muscles?
Where can we find smooth muscles?
Where can we find skeletal muscles?
Where can we find cardiac muscles?
What is a synonym for brain stem?
The sensory receptors for touch are located in the ______________.
The sensory receptors for smell are located in the ______________.
- Olfactory Epithelium
The sensory receptors for taste are located in the ______________.
- Taste Buds
The sensory receptors for sight are located in the ______________.
-Retina : Rod cells + Cone cells
The sensory receptors for hearing are located in the ______________.
Science: Chapter 7