A&P1- exercise 9

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give an example that illustrated the involuntary control of cardiac muscle tissue.

heart rate will increase with exercise. during sleep your heart rate slows.

cellular connection between cardiocytes

intercalated disc

what muscle tissues are controlled involuntarily?

cardiac and smooth muscle

involuntary, striated cells

cardiac muscle

striated, uni-nucleated cells

cardiac muscle

where in the body does smooth muscle occur?

digestive, urinary, respiratory, reproductive systems. lining of blood vessels and iris of the eye.

muscle fiber membrane

sarcolemma

what type of muscle tissue is striated?

skeletal and cardiac

how are skeletal and cardiac muscle tissues similar to each other? how do these two muscle tissues differ?

skeletal and cardiac muscle are both striated. skeletal muscle is voluntary, cardiac muscle is involuntary

muscle tissue in tip of tongue

skeletal muscle

voluntary muscle

skeletal muscle

describe how skeletal muscle fibers become multi-nucleated.

skeletal muscle fibers become multi-nucleated when embryonic cells called myoblasts fuse to form a synctytium, a cell with many nuclei. the resulting muscle fiber is a large, elongated multi-nucleated cell.

muscle tissue in artery

smooth muscle

non-striated muscle

smooth muscle

how are smooth muscle cells similar to skeletal muscle fibers? how are they different from skeletal muscle fibers?

smooth muscle and skeletal muscle both have a nucleus and cell membrane. DIFFERENCE: smooth muscle- non-striated, uni-nucleated. skeletal muscle- striated, multi-nucleated

what is the function of intercalated discs in cardiac muscle?

to conduct the stimulus of contraction to the neighboring cardiocytes


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