Which of the following statements best describes RNA?

A. RNA is a double helix.
B. RNA is a single-stranded molecule.
C. RNA molecules are antiparallel.
D. RNA contains the base thymine.
E. RNA is found outside a cell.


B

Anatomy & Physiology

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________ is an endocrine disorder characterized by too little antidiuretic hormone.

A. Uremia B. Renal failure C. Diabetes insipidus D. Urinary tract infection

Anatomy & Physiology

An allergen circulating in the bloodstream affects mast cells throughout the body, dropping blood pressure to dangerously low levels. This response is termed

A) allergy. B) hypersensitivity. C) allergic rhinitis. D) anaphylactic shock. E) asthma.

Anatomy & Physiology

Scar tissue is the result of

A) large numbers of collagen fibers and relatively few blood vessels in the injured area. B) increased numbers of epidermal layers in the area of the injury. C) a thickened stratum basale in the area of the injury. D) increased numbers of fibroblasts in the injured area. E) a lack of sebaceous glands in the injured area.

Anatomy & Physiology

Renal clearance of PAH ________ glomerular filtration rate.

A. is less than B. exceeds C. is equal to

Anatomy & Physiology