The microscope preferred for viewing living specimens is the ________ microscope
A) bright-field
B) phase-contrast
C) scanning electron
D) scanning tunneling
E) transmission electron
B
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What defines a lipid?
a. They are soluble in water. b. They are insoluble in polar solvents such as water. c. They are polymers. d. They always have a multi-ringed structure.
Peristalsis
a. is an involuntary smooth muscle response to swallowing. b. is a voluntary smooth muscle response to swallowing. c. is controlled by muscles surrounding the trachea. d. occurs when food enters the airway instead of the esophagus. e. is both b and c.
What is the right description for the mucosa?
A) made of smooth muscle B) contains secretory glands that release enzymes C) part of the peritoneum D) made of connective tissue
The hormone produced by cells around the embryo that maintains the corpus luteum and pregnancy is called
A. estrogen. B. progesterone. C. human chorionic gonadotropin (HCG). D. follicle-stimulating hormone (FSH). E. luteinizing hormone (LH).