Unit 1 Flashcards
What is a bone?
Rigid skeleton that makes up internal framework
What is a ligament?
Connective tissue that binds one bone to another
What is a tendon?
Connective tissue that attaches muscle to bond
What is a joint?
Where two bones move together
What is cartilage?
Tough but flexible tissue that covers the ends of bones. Gives shape to ears, nose, etc.
How many bones are there in the average human body?
206
What are the components of the skeletal system?
Bones, joints, cartilage, ligaments, and tendons
What are the four classifications of bones?
Long, short, flat, and irregular
What are the three categories of joints?
Immovable, slightly moveable, and freely moveable
What is the function of the muscular system?
Enables movement, produces heat, helps posture, provides joint stability
What are the three types of muscles?
Striated, smooth, and cardiac
What are striated muscles responsible for?
Movement
What are smooth muscles responsible for?
Visceral muscles. Lines the walls of internal organs
What are cardiac muscles responsible for?
Unique type of muscle responsible for heart function. Striated and smooth
What is unique about cardiac muscles?
They are striated and smooth
Why are striated muscle called striated?
They appear to have lines under a microscope
What is the nervous system?
The control center for all actions both conscious and unconscious
What are the components of the nervous system?
The central nervous system and peripheral nervous system
What are the functions of the nervous system?
The major controlling, regulating, and communicating system throughout the body.
Receives sensory input.
Sends signals to the brain
Regulates homeostasis
Communicating throughout the body for movement.
What does CNS stand for?
Central nervous system
What does PNS stand for?
Peripheral nervous system
What is the main difference between CNS and PNS?
CNS is composed of the brain and spinal column. PNS are all nerves outside of the spine and brain.
Which part of the nervous system are the sensory organs part of?
Peripheral nervous system
Im a broad sense, how do sensory organs work?
Sensitive cells react to sound, light, and movement. Info is then sent to the brain.
