Question

Which statements could be true based on the Allele data shown in the table? Select all that apply.

Answer 1

Answer:

1. Smooth muscles can be found in Vessels
2. Skeletal muscles can be found in the body Extremities and the contraction is voluntary
3. Cardiac muscle is similar to skeletal muscle. Cells are arranged parallel to each other and the contraction is similar molecularly.

Explanation:

• The smooth muscle is formed by fusiform cells, mononucleated, and no transversal striations. There is a protein contraction system, but not as organized as the one of the skeletal muscle.

Smooth-muscle can be found in organs, vessels, veins, and arteries. It provides sustained contractions, slow and rhythmical, but not voluntary.

• Skeletal muscle is the most abundant muscle in vertebrates, constituting the somatic musculature. It proportionates motion to extremities and digits and is responsible for the position and posture of the individual. It is also involved in eye movements, respiration, mastication, deglutition, and phonation. It moves the tongue, the superior esophagus, and the pharynx.

The skeletal muscle is innervated by axons of the motor neurons coming from the CNS. The contraction of the skeletal muscle is voluntary and fast.

Cells composing the striated muscle are significantly long and multinucleated. They arrange in bundles, where cells are parallel to each other.

• Myocardium tissue is more similar to the striated tissue than to the smooth one. However, there are some differences between them. Cardiac cells are cylindrical and smaller, with ramifications. Cardiac cells only have one nucleus, and occasionally there can be two. Actin and myosin filaments are arranged just as the skeletal ones, and the contraction of cardiac cells is molecularly very similar to the skeletal.