39. An atom has an atomic number of 19 and a mass number of 39. This atom will h

Question

39. An atom has an atomic number of 19 and a mass number of 39. This atom will have A. neutrons. B. 20 C., 39 D. 58 neutrons. E. 20 electrons. 40. Which of the following best describes a proton? A- one negative charge, no mass, found in orbitals B. no charge, mass of one, found in nucleus C. one positive charge, mass of one, found in nucleus D. subatomic particle with no electric charge E. None of these choices is correct. 41. The four most abundant elements in the human body are A. carbon, hydrogen, oxygen, and iron. B. carbon, hydrogen, oxygen, and nitrogen. C, calcium, hydrogen, sodium, and potassium. D. carbon, oxygen, magnesium, and zinc. E. carbon, sulfur, calcium, and potassium. vertical plane that separates the body into right and left portions is called a A. sagittal B. transverse C. frontal D. horizontal E. coronal 43. Proximal means A. toward the or midline of the body. B. away from the surface. C. closer to the head. trunk. D. closer than another structure to the point of attachment to the E. toward the back of the body.

Explanation / Answer

39.An electronhas an atomic no of 19.....mass no of 39...This atom will have-B.20 NEUTRONS

MASS NO=ATOMIC NO+NO OF NEUTRON

or,39=19+x(no of neutron)

x=20

40.which of the following best describes a proton?

ans- C. one positive charge,mass of one,found in nucleus.

proton mass=1.0072766a.m.u

41. The four most abundant elements in the human body are-

ans-B. carbon,hydrogen,oxygen and nitrogen.

42.A vertical plane that seperates the body into right and left portions is called a _____plane?

ans-A.saggital

43.Proximal means -

a. Toward the middle or midline of the body

44.While stacy is in the process of passing over the bar during a pole vault,her hips are considered to be--

C.infereior to her shoulder

45.which of the following sets of directional terms are most appropriately reffered to as opposites?

a. distal and proximal.

proximal-closest to the centre of the body where distal-the farthest point from the centre of the body.

47.The change in the shape of tissues or organs is called--

E. morphogenesis

Morphogenesis is the process of development its shape.

48.which of the following is consistent with homeostasis--

A. as body temp. rises sweating occurs to cool the body.

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