Which part of the microscope is the circular area on the stage that light passes through?
A) Aperture
B) Arm
C) Iris diaphragm
D) Ocular lens
Answer: A
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Which of the following stimulates gallbladder contraction?
a. CCK b. secretin c. sympathetic stimulation d. a and b e. a and c
Premature infants are at risk of infant respiratory distress syndrome because of lack of
A. respiratory muscle strength (e.g., of the diaphragm). B. serous fluid between the pleurae. C. functional respiratory membrane cilia. D. surfactant, a lipoprotein secreted in alveoli. E. fluid clearance from airways.
The walls of kidney tubules are formed by ________ epithelium, which functions in resorbing materials filtered from blood plasma such as nutrients, ions, and water.
A. stratified columnar B. stratified cuboidal C. simple squamous D. simple cuboidal E. stratified squamous
The figure shows the bones of the right orbit. What bone does "E" represent?
A. Lacrimal B. Zygomatic C. Maxilla D. Frontal E. Ethmoid