Surfactant is necessary to prevent collapse of the alveoli in the lung because in its absence, water molecules
A. are more strongly attracted to each other by van der Waals forces.
B. congregate around nearby proteins to which they adhere.
C. vaporize and take up much less space.
D. are more strongly attracted to each other by cohesive forces.
Answer: D
You might also like to view...
All of the following are true of olfactory pathways except which one?
A) They project first to the occipital lobes and then to the thalamus. B) Neurons from the olfactory epithelium synapse in the olfactory bulb. C) Information flows to the olfactory cortex, hypothalamus, and limbic system. D) They reach the forebrain without first synapsing in the thalamus. E) The limbic system-olfactory pathway connection means that there are close ties between experiences and memories with smell.
The common iliac arteries divide to form a branch that enters the pelvic cavity and a branch called the ________ that proceeds to the lower limb.
A) inferior branches B) inguinal arteries C) femoral arteries D) sacral arteries. E) external iliac arteries
Name the hormones of the thyroid gland
A) calcitonin and parathyroid hormone B) calcitonin and calcitriol C) thyroglobulin and calcitriol D) thyroxine (T4), triiodothyronine (T3), and calcitonin E) thyroglobulin and iodine
Ingested carbohydrates are first chemically digested by
A. trypsin. B. pepsin. C. salivary amylase. D. pancreatic amylase.