E2: Observing Body Tissues (III) Flashcards
It is excitable, responding to stimulation and contracting to provide movement
Muscle tissue
What are the three major types of muscle tissue
- Skeletal muscle
- Smooth muscle
- Cardiac muscle
Long cylindrical fiber; striated; many peripherally-located nuclei.
Skeletal muscle
Voluntary movement; thermogenesis; organ protection
Skeletal muscle
Attached to bones; found around entrance points to body (e.g. mouth, anus)
Skeletal muscle
Short, branched fibers; striated; single central nucleus
Cardiac muscle
Contracts to pump blood
Cardiac muscle
Located in heart walls
Cardiac muscle
Short, spindle-shaped fibers; no evident striation; single nucleus
Smooth muscle
Involuntary movement; moves material through the digestive tract and ducts; regulates blood flow in arteries
Smooth muscle
Located to the walls of major organs and passageways
Smooth muscle
It is also excitable, allowing the propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body
Nervous tissue
What are the two main classes of cells that make up nervous tissue?
- Neuron
- Neuroglia (Glial Cells)
Propagate information via electrochemical impulses, called action potentials, which are biochemically linked to the release of chemical signals
Neurons
It plays an essential role in supporting neurons and modulating their information propagation
Neuroglia (Glial Cells)
Neurons propagate information via electrochemical impulses, called ___________
Action potentials
True or False
The presence of the nervous tissue throughout the body and its organization allows it to receive, integrate and provide information to the entire body
True
What are the three parts of the Neuron?
- Cell Body (Soma)
- Dendrites
- Axon
Neuron’s life support
Contains the nucleus, mitochondria, DNA
Cell Body (Soma)
Collects Signals from other cells to send back to the soma
Dendrites
Carries Messages to other neurons, muscles, and glands
Axon
