How many different amino acids can be used to make

ATI RN

ATI RN Test Bank

How many different amino acids can be used to make human proteins?

A. 10 B. 12 C. 20 D. 24

Correct Answer: C

Rationale: 20 standard amino acids are encoded by the genetic code for human proteins.

What type of epithelium makes up the outer layer of the skin where protection is important?

A. simple cuboidal B. stratified squamous C. pseudostratified columnar D. transitional

Correct Answer: B

Rationale: Stratified squamous epithelium, multi-layered and tough, protects the skin.

What type of connective tissue consists of fibroblasts and bundles of parallel collagen fibers?

A. Areolar connective B. Fibrocartilage C. Irregular dense connective D. Regular dense connective

Correct Answer: D

Rationale: Regular dense connective tissue (e.g., tendons) has parallel collagen fibers and fibroblasts.

Identify the two types of bone tissue.

A. Compact and skeletal B. Compact and hyaline C. Compact and spongy D. Spongy and skeletal

Correct Answer: C

Rationale: Bone tissue is compact (dense) and spongy (trabecular), differing in structure.

Which type of neuroglia forms the myelin sheath in the brain and spinal cord?

A. astrocytes B. microglia C. oligodendrocytes D. Schwann cells

Correct Answer: C

Rationale: Oligodendrocytes myelinate axons in the CNS (brain and spinal cord).

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