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This type of muscle is striated, involuntary, with one centrally located nucleus.

A.

skeletal MT

B.

cardiac MT

C.

smooth MT

D.

All types of muscle tissue have these characteristics.

Answer and Explanation

The Correct Answer is B

A. skeletal MT: Skeletal muscle tissue is striated and voluntary, with long multinucleated fibers. The nuclei are located at the periphery of the cells, making it different from the muscle type described.

B. cardiac MT: Cardiac muscle tissue is striated and involuntary, with cells that usually contain one centrally located nucleus. It also features intercalated discs that allow synchronized contraction, matching the characteristics given.

C. smooth MT: Smooth muscle tissue is involuntary but non-striated. The cells are spindle-shaped with a single central nucleus, so it does not meet the description that includes striations.

D. All types of muscle tissue have these characteristics: Not all muscle types share striations, involuntary control, and a single central nucleus. This description specifically fits cardiac muscle tissue rather than all types.


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Correct Answer is A

Explanation

True:White fat primarily stores energy and provides thermal insulation, cushioning organs and helping regulate body temperature. Brown fat, rich in mitochondria, generates heat by burning lipids through non-shivering thermogenesis, especially important in infants and during cold exposure.

Correct Answer is B

Explanation

A. it is located just below the epidermis and protects the dermis from shock:The hypodermis is located beneath the dermis, not just the epidermis, and its role is more about cushioning and insulation rather than directly shielding the dermis from shock.

B. the major part of its makeup is adipose, which serves as an effective shock absorber:The hypodermis contains a large amount of adipose tissue that cushions underlying structures, distributes pressure, and absorbs mechanical shock.

C. the cells that make up the hypodermis secrete a protective mucus that absorbs shock:The hypodermis does not secrete mucus; this function is unrelated to connective tissue structure and physiology.

D. it has no delicate nerve endings and can therefore absorb more shock:The absence of many nerve endings does not make the hypodermis a shock absorber. Its cushioning effect is due to adipose tissue composition, not nerve distribution.

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