pg. 1
PLTW BIOMED FINAL EXAM 2024 COMPLETE 150
REAL EXAM QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT) GRADED A+
what happens to the neurons during a concussion? - Correct Answer - they are stretched, sheared, or transected (cut into pieces). when an individual has multiple severe concussions over their lifetime, a protein called tau forms clumps in the brain. these proteins slowly spread throughout the brain and kill brain cells.
what are the short term effects/symptoms of concussion? - Correct Answer
- vacant stares, disorientation, inability to focus, memory impairment,
slurred speech, and stumbling. may or may not involve a lot of consciousness. can heal within a few months.
what are the potential long-term effects of repeat concussions? - Correct Answer - multiple concussion which lead to tau protein formation can cause more severe symptoms including paranoia, mood and behavior changes, aggression and depression. if it is a sports player, a doctor may require the athlete to stop their sport to prevent permanent brain damage. may or may not involve a lot of consciousness. can heal within a few months.
left side of the heart; pumps blood to the body to drop off oxygen. - Correct Answer - systemic pump
right side of the heart; pumps blood to lungs to get oxygen - Correct Answer - pulmonary pump 1 / 3
pg. 2 when both alleles are the same (either dominant OR recessive) - Correct Answer - homozygous
the 2 versions of each gene we inherit, one from mom & one from dad - Correct Answer - alleles
when the two alleles are different (one recessive & one dominant) - Correct Answer - heterozygous
the passing of traits to child from parents (via genes on chromosomes) - Correct Answer - heredity
the 2 alleles for a gene - Correct Answer - genotype
the variant that is only expressed if there are 2 copies, represented with lowercase letter - Correct Answer - recessive
a family tree diagram showing that occurrence of the heritable characteristics in parents and offspring over multiple generations - Correct Answer – pedigree
DNA is uncoiled and is called chromatin. the cell grows, DNA replicates, and organelles grow in preparation for cell division. - Correct Answer - interphase
the nuclear membrane breaks apart and the chromatin condenses into chromosomes. the centrioles form a star-shaped structure and a spindle forms between them. - Correct Answer - prophase
- / 3
pg. 3 chromosomes line up in the center of the cell. each chromosome attaches itself to a spindle fiber. - Correct Answer - metaphase
the chromatids are pulled apart by the spindle fibers and are moved to opposite sides of the cell. - Correct Answer - anaphase
two new cells are formed, spindle fibers disappear, the chromosomes uncoil again, and the nuclear membrane reappears. - Correct Answer - telophase
the cytoplasm splits into two daughter cells and usually occurs simultaneously with telophase. - Correct Answer - cytokinesis
abnormal growth of tissue that can be cancerous or benign - Correct Answer – tumor
abnormal growth of cells, but in a capsule, slow growing, non cancerous, won't metastasize, cells are normal - Correct Answer - benign
abnormal growth of cells, fast growing, cells abnormal with dark nucleus, likely to metastasize - Correct Answer - metastasis
the spreading of abnormal cells to a new area of the body - Correct Answer – malignant
when there is a sudden increase in the number of cases of a disease in a population - Correct Answer - epidemic
- / 3