Muscles Of The Human Body Quiz

Yeah, easy question. The purpose of these quizzes for me is as much reinforcement as testing. Hopefully other people also find them helpful. In case you didn't know, muscles don't filter wastes but do everything else listed.

This is the quality that sets muscle apart from all other tissues.

A fasicle is a bundle of muscle fibers which is then wrapped by a perimysium sheath.

A muscle fiber is a long multinucleate cell and could be referred to as a muscle cell.

Elasticity is the correct answer and can be easily confused with extensibility.

These are the four primary functional characteristics of muscle tissue.

Skeletal and cardiac muscle are both striated, smooth is obviously smooth.

Fleshy attachments are instances of the epimysium being connected directly to a periosteum (bone) or perichondrium (cartilage)

The endomysium is the sheath surrounding each individual muscle fiber.

Myoglobin is red and stores oxygen, much like hemoglobin of blood, also found in the sarcoplasm of the muscle fiber.

Epimysium covers the organ level of the muscle and is constructed primarily of Dense Irregular Connective Tissue

The insertion is the more movable attachment and is located distally on the appendicular skeleton and laterally on the axial skeleton.

The repeating series of dark A bands and light I bands are responsible for muscle striations. Snoof is my crappy band. The H zone is the midsection of the A band.

The sarcolemma is the plasma membrane of the multinucleate muscle cell. Sarcoplasm is they cytoplasm-type material of a muscle cell. Endoplasmic reticulum is a standard cell organelle and can be either smooth or rough (smooth associated with lipid synthesis and rough associated with protein synthesis - amongst other things).Sarcoplasmic reticulum is the elaborate Smooth ER of a muscle cell, and I think I made the first word up.

This is a true statement, due to the small size and durability of this arrangement where the connective tissue wrap of the muscle extends as either a tendon or aponeurosis.

Glycosomes are granules of glycogen that are stored in great numbers in the sarcoplasm of muscle fibers to provide quick access to energy for muscular contraction.

Extensibility is the ability to be extended or stretched. Although muscle fibers are shortened when contracted, they can be stretched even beyond resting length when relaxed.

The Z line is a midline interruption of the I bands, sometimes referred to as a Z disc. It is composed largely of the protein alpha actinin and anchors the thin filaments in the myofibril. A band is the longer segment separating the I bands, the H zone is the section of the myofibril that doesn't have thin filaments in the middle of the A band. Electric Sex Circus is one of my favorite bands from the late 80's/early 90's.

The tubules of the Sarcoplamic Reticulum surround the myofibrils and some form perpindicular cross channels at the A - I band junction which are known as terminal cisternae. They always occur in pairs, and with the T tubule form a triad.

Approximately 80% of the cellular volume consists of myofibrils - which contain the contractile elements of skeletal muscle.

Walls of heart = cardiac/involuntary, Visceral muscles (muscles of visceral organs) = smooth/involuntary, the Risorius is the muscle of the face that laterally draws corners of lips, tenses lips, and is a synergist of the zygomaticus (the smiling muscle) that I always forget.

You will find all three, the sarco prefix in the word and myoglobin and lots of glycosomes in the actual material.

Irritability or Excitability is the ability to receive and respond to stimulus

The sheath surrounding each muscle fiber is constructed mainly of areolar and reticular connective tissue fibers.

An aponeurosis is usually refered to as a sheet-like connective tissue, but it is a tough collagenic fiber and also a muscle to bone connection, so all of the above was the correct answer.