Muscles and Muscle Tissue
list the types of muscle tissues
skeletal, cardiac and smooth
what are muscles cells also called and why?
muscle fibers - because of their length
what is the plasma membrane of a muscle cell called?
what is the cytoplasm in a muscle cell called?
which muscles fibers are the longest of the 3 types?
skeletal muscles fibers
list 5 characteristics of skeletal muscle tissue
striated, voluntary control, contracts rapidly while tiring easily, responsible for body mobility, exerts adaptable force
skeletal muscles are composed of ______ and attach to _____
skeletal muscle tissue/the bony skeleton
what are the 4 special characteristics of muscle tissue?
excitability, contractility, extensibility and elasticity
what are the 4 important body functions that muscle performs?
produces movement, maintains body posture, stabilizes joints and generates heat
when describing muscle, what does "striated" mean?
Harry is pondering an exam question that asks, "Which muscle type has elongated cells and is found in the walls of the urinary bladder?" How should he respond?
the three connective tissue wrappings are:
epimysium, perimysium and endomysium
an overcoat of dense regular CT that surrounds the entire muscle
fibrous CT that surrounds groups of fascicles
fine sheath of CT composed of reticular fibers surrounding each muscle fiber
each skeletal muscle fiber is supplied with _______ that controls contraction
a nerve fiber
how is waste removed from skeletal muscle tissue?
via blood moving through the veins
how does the delivery of oxygen affect skeletal muscle? and how does it get there?
contracting fibers require a continuous delivery of oxygen and nutrients. it arrives via blood
list 3 functions of muscle CT
moves bones by contractions that pull on the various layers of CT, contributes to the elasticity of muscle tissue and provides entry and exit to blood vessels and nerve fibers
define direct (fleshy) attachments
the epimysium of the muscle is fused to the periosteum of the bone or perichondrium of a cartilage
define indirect attachments
CT wrappings extend beyond the muscle as a tendon or aponeurosis