45. A researcher discovered a new hormone thuat raises blood calcium levels Aoco

Question

45. A researcher discovered a new hormone thuat raises blood calcium levels Aoconding toh negative feedback, this bormone would be secreted when A. None of these choices is correct B. blood calcium levels increase C. blood calcium levels are elevated D. blood calcium levels are stable E. blood calcium levels decrease priples ot 46. Which of the following statements is true? A. The adult vertebral column has three curvatures. B. An exaggerated thoracic curvature of the vertebral oolumn is called kyphons C. Lordosis D. Scoliosis is the term applied to normal curvature of the spine. E. The cervical curve develops before birth is an exaggeration of the cervical curvature. 47. Organize the following structural levels of the human body from simglenst mot comglex (1) cell (2) tissue (3) chemical (4) organ system (5) organ A. 3, 1,2,5,4 B. 1, 2,3, 4, 5 C. 3, 1,2, 4, 5 D. 2,3, 1,4,5 E. 4, 2, 3, 1,5 your son is diagnosed with hemophilia, he would have 48. If A. a disorder of the clotting process. B. an increased erythrocyte count C. an infection of the blood. D. a type of cancer affecting white blood cells E. an antigen-antibody reaction. 49. Solution A contains 5 grams of sugar per liter while solution B contains 2 grams of sugar per liter. The solutions are separated by a selectively permeable membrane. If the solvent in both solutions is water, predict in which direction most of the water molecules will move A. move by filtration from solution A to solution B B. move by osmosis from solution B to solution A C. move by active transport from solution B to solution A D. There will be no movement of water. E. move by simple diffusion from solution A to solution B

Explanation / Answer

45. The blood Ca level decreases when the hormone will release into the blood to increase the blood Ca level(Parathormone).

46. A cervical curve develops before birth within first few months of life as the infant develops sufficient strength and coordination to hold his head up.

47. The correct answer will be chemical, cell, tissue, organ, organ system i.e. 3,1,2,5,4.

48. Haemophilia is a disorder of clotting process of blood. It is a genetic disorder in which bleeding takes place and blood clotting stops.

49. In his solvent will move from solution B to A because solution B contains more solute than solution B so less solvent(water) in solution B than A.

50. Covalent bonds are formed when electrons ate shared between two atoms.

51. A herniated disc occurs when there is protrusion of the nucleus pulposus.

52. Contraction is not a function of connective tissues. Actually, the functions are storage of fats, insulation against heat loss( adipose tissues), transport of gases, wastes and nutrients(blood), provides support (cartilage).

53. Hypertrophy of skeletal muscle from weight lifting is due to increase in the size of the muscle fibers.

54. The function of plasma protein is the regulation of osmotic pressure. Plasma proteins are albumins, immunoglobulins, fibrinogens etc.

55. 4 tissue types are epithelial, connective, muscle and nerve.

56. The layer o the epidermis that undergoes mitosis and forms new epidermal cells is the " Stratum basale"

57. E. Sarcolemma is the cell membrane of the muscle cell.

58. The loss of height that occurs with aging is due to compression of the invertebral discs. It lies between adjacent vertebrae in the vertebral column.

59. Smallest to largest: myofilament, myofibril, muscle fibre and fascicle.

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