The process by which cells secrete cellular products into the extracellular environment is ________.
A. pinocytosis
B. exocytosis
C. endocytosis
D. phagocytosis
Answer: B
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Acid reflux into the esophagus ("heartburn") is normally prevented by ________.
A. pharyngeal and buccal sphincters B. the lower esophageal sphincter (LES) C. pharyngeal constrictors D. esophageal glands E. the upper esophageal sphincter
Each _____ includes a Z disk and extends from each side of the Z disk to the ends of the myosin myofilaments
A. isotropic band or I band B. anisotropic band or A band C. muscle fiber D. sarcomere
If a cell has ?1 adrenergic receptors, it is sensitive to ________
A) alpha adrenaline B) acetylcholine (ACh) C) norepinephrine (NE) D) nicotine E) adrenaline
Which position of the three primary germ layers in the early embryo is correct?
A. Ectoderm on the inside, endoderm on the outside, and mesoderm in the middle B. Endoderm on the inside, ectoderm on the outside, and mesoderm in the middle C. Mesoderm on the inside, endoderm on the outside, and ectoderm in the middle D. Mesoderm on the inside, ectoderm on the outside, and endoderm in the middle E. Ectoderm on the inside, mesoderm on the outside, and endoderm in the middle