In multiple sclerosis, a patient:a
loses coordination due to the replacement of myelin with scar tissue.
b. accumulates neurofibrillary tangles in the brain resulting in dementia.
c. suffers tremors due to overly rapid and spontaneous firing of neural impulses.
d. loses the ability to move because of motor neuron degeneration.
e. suffers depression due to abnormal secretion of neurotransmitters
a
You might also like to view...
Bacterial flagella are composed of three parts: the ________ body, which is embedded in the cell, the hook, and the ________, which is the longest part of the flagellum.
Fill in the blank(s) with the appropriate word(s).
An organism with a temperature growth optimum near 80°C and a pH growth optimum between two and three is usually referred to as a(n) ________.
A. thermophile B. thermoacidophile C. halophile D. thermoalkalophile
Sickle-cell anemia is a genetic disease caused by the presence of a faulty hemoglobin gene (HbS). The normal version of this gene is HbA. Which of the following is TRUE about HbS and HbA?
a) It is impossible for a person to carry two HbS genes. b) Hemoglobin genes are always inherited from one's mother. c) People carrying two HbS genes smell like rotten fish. d) They're both alleles for the same trait. e) A person with two HbS genes would be a silent carrier.
The amphibians' unique contribution to the evolution of land vertebrates was
A. respiration through the skin. B. development of the tail for propulsion. C. respiration by gills. D. separation of lung/gill and systemic (body) circulation. E. the leathery waterproof egg shell.