A pathologist is examining histological (tissue) samples from a client with an autoimmune disease. Which of the following characteristics of muscle samples would signal the pathologist that the samples are cardiac rather than skeletal muscle?
A)
The cell samples lack intercalated disks.
B)
The muscle cells have small and a few mitochondria.
C)
The cells have a poorly defined sarcoplasmic reticulum.
D)
The muscles are striated and composed of sarcomeres.
Ans:
C
Feedback:
Cardiac cells have a less clearly defined sarcoplasmic reticulum than do skeletal muscles. They also have intercalated disks and large, numerous mitochondria. Both types of muscles are striated and composed of sarcomeres.
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