Question

a)__ is the basic
structural unit of all living things.
b) Amoeba and Paramecium are__organisms.
c) The___shape of muscle
cells allows them to contract and relax, making the muscles move.
d) The ___cell is the longest of all cells.
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Answer 1

Answer:

a) cell

b) unicellular

Answer 2

Answer:

• Similar to skeletal muscle, cardiac muscle is striated and organized into sarcomeres, possessing the same banding organization as skeletal muscle (Figure 1). However, cardiac muscle fibers are shorter than skeletal muscle fibers and usually contain only one nucleus, which is located in the central region of the cell.
• The muscle cell is long so it can contract and relax with other cells
• Fast glycolytic fibers: this is the thickest and strongest, but fatigues the quickest. This muscle has the ability to contract very quickly, but can not maintain the contraction for very long.

Explanation:

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