An atom of iron has an atomic number of 26. Which of the following is TRUE?
A) Iron has 13 protons and 13 electrons. B) Iron has 26 protons.
C) Iron has 13 electrons. D) Iron has 13 protons and 13 neutrons.
Answer: B
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In treating a burn patient, the "rule of nines" is used to estimate the
A. depth of the burn. B. surface area of the burn. C. type of scar that will form. D. degree and source of the burn.
Identify the process featured in the image.
A) translation
B) replication
C) transcription
D) mitosis
E) meiosis
Calcium is a bivalent ion that is responsible for neuromuscular transmission, cell membrane permeability, hormone secretion, and:
a. Bronchial constriction b. Production of ADH c. Release of chorionic gonadotropin d. Smooth muscle contraction
Chemicals that signal the same cell that made them are called ________ messengers, while those that signal nearby cells are called_____ messengers.
A. paracrine; endocrine B. autocrine; paracrine C. endocrine; pheromone D. allomone; autocrine E. pheromone; prostaglandin