Muscle

Question 1

what is a muscle?

Answer 1

muscles are soft tissues that contain protein filaments of actin and myosin that slide past one another

Question 2

what is the function of muscle?

Answer 2

to produce force and motion (movement)

Question 3

what are the types of muscle?

Answer 3

skeletal, smooth and cardiac

Question 4

describe skeletal muscles

Answer 4

contraction is quick, forceful and usually under voluntary control. They contain bundles of very long, multinucleated cells.

Question 5

describe smooth muscle

Answer 5

have slow, involuntary contractions- found in the stomach, uterus, bladder, intestine. They consist of collections of fusiform cells.

Question 6

describe cardiac muscle

Answer 6

involuntary, vigorous and rhythmic contractions. They are composed of elongated, often branched cells bound to one another at structures called intercalated discs that are unique to cardiac muscle

Question 7

Differentiation of types of muscles on histological aspects

Answer 7

skeletal muscles have cross-striations, smooth muscle lack striations and cardiac muscles have cross-striations.

Question 8

what is sarcomere?

Answer 8

a sarcomere is the basic contractile unit of muscle fiber

Question 9

what is sarcoplasm?

Answer 9

sarcoplasm is the cytoplasm of striated muscle cells