Epithelial cells that are adapted for membrane transport of materials, such as ions and nutrients, usually have ________ on their apical surface.
A) junctional complexes
B) microvilli
C) cilia or flagella
D) vesicles
E) mitochondria
B) microvilli
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Type 1 diabetes mellitus is caused by
A. an effect of aging. B. obesity. C. a disorder of the immune system. D. excess sugar in the diet.
The respiratory rate is
A) higher in adults than in children. B) roughly 20-30 breaths per minute for toddlers. C) the movement of about 500 ml of air per breath at rest. D) the number of breaths per hour. E) needed to calculate residual volume.
Initiation of labor involves all of the following EXCEPT ________.
A. cortisol from the mother and fetus B. DHEAS from the fetal adrenal gland C. human chorionic gonadotropin from the placenta D. corticotropin-releasing hormone from the placenta
Which solution is the most likely to have a pH of 3 or 4?
A) Baking soda B) Coffee C) Water D) Bleach