What symptoms indicate that the auditory tube is blocked?
What will be an ideal response?
Pressure either increases or decreases within the middle ear cavity because air pressure across the tympanic membrane cannot be equalized. If the pressure is strong enough, it may result in pain.
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Why are anionic nutrients generally mobile in soils, and thus easily leached, while cationic nutrients are relatively immobile?
A) Anions readily form crystals while cations do not B) Cations interact with clay particles and organic materials C) Cations have a stronger tendency to aggregate D) Anions are repelled from the surfaces of living roots
Which component of the blood is most important for clotting?
A. plasma B. leukocytes C. erythrocytes D. platelets E. All of the choices listed for this question are important for clotting.
The maximum life expectancy for a patient with cystic fibrosis is approximately
a. 15 years. b. 20 years. c. 25 years. d. 30 years. e. 50 years.
Nearly half of the pregnancies that end in miscarriage have:a
trisomy of chromosome 21. b. homozygosity for a recessive lethal allele. c. major chromosomal abnormalities. d. Klinefelter syndrome. e. Down syndrome.