What fatty molecule is made by alveolar cells to reduce surface tension and prevent alveolar collapse between breaths?
A) sebum
B) surfactant
C) nicotine
D) mucus
B
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Name the fluids found within the scala vestibuli, scala tympani, and cochlear duct
A) Perilymph fills the scala vestibuli. Endolymph fills the scala tympani and cochlear duct. B) Perilymph fills the scala vestibuli and the scala tympani. Endolymph fills the cochlear duct. C) Perilymph fills the cochlear duct. Endolymph fills the scala vestibuli and the scala tympani. D) Perilymph fills the scala tympani and cochlear duct. Endolymph fills the scala vestibuli. E) Perilymph fills the scala vestibuli and cochlear duct. Endolymph fills the scala tympani.
Usually, awareness of the stimulus occurs before a reflex action has been initiated.
Answer the following statement true (T) or false (F)
By what endocytosis process do some white blood cells engulf bacteria?
A) facilitated diffusion B) phagocytosis C) exocytosis D) pinocytosis E) filtration
The "control center" of the cell is the
A. endoplasmic reticulum. B. mitochondrion. C. nucleus. D. plasma membrane. E. ribosome.