BIO 171 Exam 2

Biology 171 with Clark at Eastern Kentucky University

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By: Sarah Conn
Created: 2011-10-16
Size: 36 flashcards
Views: 61

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Skeletal Muscle

voluntary striated muscle that you consciously control the movement of. That found in all limbs and body walls.

Cardiac Muscle

involuntary striated muscle, innervated by the autonomic nervous system. Found only in the walls of the heart.

Smooth Muscle

involuntary, non-striated muscle,innervated by the autonomic nervous system. Found in the walls of blood vessels and hollow internal organs.

Fascia

fibrous CT (primarily collagen fibers) that surrounds and separates muscles in the body

Tendon

a cord-likefascialextension at end of the muscle attaching it to body by the intermingling of collagen fibers with those of theperiosteum

Aponeurosis

broad, sheet-like arrangement of fascia attaching muscle to muscle or bone

Sharpey's Fibers

the collagen fibers of theperiosteum that insert into the underlying bone. The collagen fibers of tendons blend with those of theperiosteum which in turn blend withSharpey’sfibers, thus forming a contractile unit

Skeletal Muscle

•parallel striated muscle cells (fibers) surrounded and held together by CT fibers, with capillary beds running parallel to fibers

•contract in response toacetylcholine (neurotransmitter)

•The striated appearance of this muscle is due to the arrangement of various myofilaments found within the contractile units (sarcomeres) of the muscle.

Sarcomere

The smallest functional unit of a skeletal muscle cell, extends from z-line to z-line

Skeletal Muscle Cell

Long, multinucleated, cylindrical cells with peripheral nuclei. Each cell (fiber) contains:

Sarcoplasm

cytoplasm of muscle cells

Sarcolemma

plasma membrane + basal lamina of muscle cells

Satellite Cells

Found between plasma Membrane and basal lamina

Skeletal Muscle Cell

Definition

Skeletal Muscle Cell

composed of bundles or fasiculi of muscle cells, surrounded by perimysium

Muscle Fasciculi

composed of muscle cells (or fibers), each surrounded by its own endomysium

Muscle Fiber/cell

composed of myofibrils contained within its sarcolemma of each cell

Myofibrils

made up of actin and myosin or myofilaments

Skeletal Muscle Striations

Definition

How Muscle Cells Contract

Definition

Connective Tissue Arrangement

Definition

Connective Tissue Arrangement

Definition

One More Time

Definition

What Controls Contraction

Definition

What controls contraction?

Definition

Cardiac Muscle

-Found only in myocardium

Cardiac Muscle

-Involuntary and striated
-Cardiac Muscle Cells-CARDIOCYTES
-Smaller than skeletal muscle cells
-Incapable of division
-Branch and rejoin each other the union facilitated by an INTERCALATED DISC

Smooth Muscle

-Non-striated, involuntary
-Cells are short, spindle-shaped
-Responds to norepinephrine and acetycholine
-Slower to contract than skeletal muscle

Multiunit Smooth Muscle

-muscle fibers poorly organized

•function as individual fibers not together as asyncytium

•found in walls of blood vessels and the iris of the eye

•typically contracts in response to nerve impulses & hormones

Smooth Muscle

Definition

Peristalsis

slow contractile waves of the gastrointestinal tract that results from fibers stimulating each other - alternate contractions and relaxations of smoothm. around tubular organs. While typical peristalsis moves food from the oral cavity down the esophagus to the stomach, reverse peristalsis is vomiting.

Smooth Muscle Locations

•In walls of all blood vessels (except heart)

•In walls of hollow organsi.e.urinary bladder

•In organized layers in the walls of the respiratory, circulatory, digestive, and reproductive tracts

Muscle Shapes

Definition

Muscle Shapes

Definition

About this deck

By: Sarah Conn
Created: 2011-10-16
Size: 36 flashcards
Views: 61

About StudyBlue

“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis