Identification of macromolecule

Relationship to other biological sciences[ edit ] Schematic relationship between biochemistrygenetics and molecular biology Researchers in molecular biology use specific techniques native to molecular biology but increasingly combine these with techniques and ideas from genetics and biochemistry. There is not a defined line between these disciplines. The figure to the right is a schematic that depicts one possible view of the relationships between the fields:

Identification of macromolecule

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There are three types of muscle tissue: Visceral, cardiac, and skeletal. Visceral Muscle Visceral muscle is found inside of organs like the stomachintestines, and blood vessels. The weakest of all muscle tissues, visceral muscle makes organs contract to move substances through the organ.

Because visceral muscle is controlled by the unconscious part of the brain, it is known as involuntary muscle—it cannot be directly controlled by the conscious mind.

Infectious patterns

This smooth appearance starkly contrasts with the banded appearance of cardiac and skeletal muscles. Cardiac Muscle Found only in the heartcardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle.

While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that stimulates other cardiac muscle cells to contract. Because of its self-stimulation, cardiac muscle is considered to be autorhythmic or intrinsically controlled.

The cells of cardiac muscle tissue are striated—that is, they appear to have light and dark stripes when viewed under a light microscope.

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The arrangement of protein fibers inside of the cells causes these light and dark bands. Striations indicate that a muscle cell is very strong, unlike visceral muscles. The cells of cardiac muscle are branched X or Y shaped cells tightly connected together by special junctions called intercalated disks.

Identification of macromolecule

Intercalated disks are made up of fingerlike projections from two neighboring cells that interlock and provide a strong bond between the cells. The branched structure and intercalated disks allow the muscle cells to resist high blood pressures and the strain of pumping blood throughout a lifetime.

These features also help to spread electrochemical signals quickly from cell to cell so that the heart can beat as a unit. Skeletal Muscle Skeletal muscle is the only voluntary muscle tissue in the human body—it is controlled consciously.

Every physical action that a person consciously performs e. The function of skeletal muscle is to contract to move parts of the body closer to the bone that the muscle is attached to.

Most skeletal muscles are attached to two bones across a joint, so the muscle serves to move parts of those bones closer to each other.

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Skeletal muscle cells form when many smaller progenitor cells lump themselves together to form long, straight, multinucleated fibers. Striated just like cardiac muscle, these skeletal muscle fibers are very strong.

Skeletal muscle derives its name from the fact that these muscles always connect to the skeleton in at least one place. Gross Anatomy of a Skeletal Muscle Most skeletal muscles are attached to two bones through tendons.

Tendons are tough bands of dense regular connective tissue whose strong collagen fibers firmly attach muscles to bones. Tendons are under extreme stress when muscles pull on them, so they are very strong and are woven into the coverings of both muscles and bones.Learn macromolecule identification with free interactive flashcards.

Choose from 35 different sets of macromolecule identification flashcards on Quizlet. A comprehensive directory of manufacturer web sites in Massachusetts.

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