A neutral atom will become a cation if it A. gains electrons. B. gains protons.
ID: 3477179 • Letter: A
Question
A neutral atom will become a cation if it A. gains electrons. B. gains protons. C. loses electrons. D. loses protons. E. gains neutrons. 31. The embryonic germ layer that is the source of coanective tissue and muscle is A. mesoderm. B. neuroglia. C. membrane. D. dendrite. E. pseudostratified columnar epithelium. S2. Consider the following structural levels chemical, organ,tissue, cell, and organ system. Which level encompasses the other four? A. tissue B. organ system C. organ D. chemical E. cell 33. The stratum basale A. is easily shed when you rub your hands together. B. has a mixture of living and dead cells - mostly dead. C, contains many blood vessels that nourish the epidermis. D. contains cells that undergo mitosis to form new epidermal cells. E. contains cells that undergo meiosis to form new epidermal cells. 34. Which of the following is consistent with homeostasis? A. As body temperature rises, sweating occurs to cool the body. B. When a person drinks large quantities of water, urine output decreases to raise blood volume. C. Elevated blood glucose levels cause insulin secretion to decline. D. Decreases in blood pressure cause a corresponding decrease in heart rate. E. As blood pressure falls, blood flow to the heart decreases.Explanation / Answer
30.C Atom is said to be neutral if it contains same number of electrons and protons .If a netral atom lose electrons, they become positive ions, or cations. as the number of protons exceed electrons.
31.A
Mesoderm is the germ layer between the other two germ layers(ectoderm and endoderm) Connective tissue is the derivative of mesoderm.
32.B
organ system is a group of organs that work together to perform one or more functions.Each organ is composed of specific tissue.tissues are composed of specialised cell,cells contain chemicals like DNA and proteins to carry out basic functions
33.D
The cells of the stratum basale are cuboidal and undergo mitosis to give rise to all of the cells in the layers above.
34.A
During rise in the body temperature, the sweat glands of the skin are activated ,releasing sweat from the skin which evaporates and cools down the skin and lowers the blood temperature
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