FINAL EXAM BIO 251 Study Guide top rated 2024 question and answers

Cells are classified into which of the following broad categories? A) Squamous, cubodial, columnar, and basement membranes B) atoms, tissues, organs, and organ systems C) skeletal, cardiac, endocrine, and nervous D) Neurons, muscle, epithelial, and connective tissue E) endocrine, nervous, integumentary, and reproductive - Answer- D) Neurons, muscle, epithelial, and connective tissue During what phase of the cell cycle does rapid protein synthesis occur as the cell grows to double its size.? A) G0 B) G1 C) G2 D) S E) mitosis - Answer- C) G2 Which of the following substances requires mediated transport to cross the blood-brain barrier? A) hydrogen ions B) glucose C) carbon dioxide D) ethanol E) oxygen - Answer- B) glucose Alzheimer's disease is caused by the loss of ________ neurons in certain brain areas and replacement of the lost neurons with scar tissue called ________. A) adrenergic : plaques B) cholinergic : myelin C) adrenergic : myelin D) cholinergic : plaques E) muscarinic : myelin - Answer- D) cholingeric : plaques Which of the following is NOT a characteristic of rapid eye movement (REM) sleep? A) loss of postural muscle tone B) illogical and bizarre thoughts C) increased brain activity D) decreased limbic system activity E) increased parasympathetic activity - Answer- E) increased parasympathetic activity Which statement best describes why nicotine should be avoided before going to bed? A) Nicotine should not be avoided before bed; it will help relax you before going to bed. B) Nicotine mimics acetylcholine, which is associated with the ascending reticular activating system. C) It binds to receptors in the cerebral cortex, which is involved with in wake/sleep cycles.