45. Each time a cell divides, the telomeres: O shorten. O lengthen. O gain recep

Question

45. Each time a cell divides, the telomeres: O shorten. O lengthen. O gain receptors on their dendrites O lose receptors on their dendrites. 46. Research indicates that which personality characteristics predict increases in bipolar symptoms over t O neuroticism and extraversion O neuroticism and conscientiousness O introversion and openness to experience O disagreeableness and introversion 47. The main cause of coronary heart t disease isa gradual narrowing of the arteries that occur due to plaque deposits. osteosclerosis O multiple sclerosis atherosclerosis O amyotrophic lateral sclerosis 48. A marked, persistent, and excessive fear and avoidance of specific objects, activities, or situations is termed _ disorder. O generalized anxiety 0 phobic O posttraumatic stress O panic

Explanation / Answer

Answer-45-(a) shorten

Our genes are arranged along twisted, double stranded molecules of DNA known as chromosomes. Telomeres are located at the ends of the chromosomes. These protect our genetic data and help cells to divide. Each time a cell divides, the telomeres become shorter. When they become too short, the cells stop dividing and become inactive.

Answer-46- (a) neuroticism and extraversion

Answer-47- (c) atherosclerosis

Atherosclerosis disease is caused by the accumulation of falty deposits on the inner surface of the arteries. It may occur in all arteries of the body including coronary arteries.

Answer-48- (b) phobic

Phobic disorders are characterised as marked, persistent and excessive fear of specific situations or objects.

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