Which feature is true for muscle tissue?
A) Muscle cells are considered to be involuntary because they have to receive information from the brain for contraction.
B) Muscle cells always contain microscopic bands called striations.
C) Muscle cells contain actin and myosin filaments.
D) Muscle cells have only one nucleus.
E) Muscle cells contain collagen protein.
C) Muscle cells contain actin and myosin filaments.
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Which of the following contract(s) when one is blowing out birthday candles?
A. Serratus anterior B. Erector spinae C. External intercostals D. Diaphragm E. Internal intercostals
Rods produce vision in shades of gray
Indicate whether the statement is true or false
A small, elevated patch of melanized skin that often has hair is called a ________.
Fill in the blank(s) with the appropriate word(s).
Both pancreatic juice and bile are secreted into the duodenum
Indicate whether the statement is true or false