What ion channels are opened to produce an action potential?
A. Sodium and potassium
B. Sodium and chloride
C. Potassium and calcium
D. Calcium and sodium
Answer: A. Sodium and potassium
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What is the thin strand of pia mater that helps to anchor the spinal cord to the coccyx?
A. Conus medullaris B. Cervical enlargement C. Terminus coccyx D. Filum terminale E. Coccygeal tendon
During external respiration, the is greater in the alveoli than in the blood of the pulmonary capillaries
Indicate whether the statement is true or false
Which type of connective tissue fiber provides strength and resists stretching?
A. Collagen B. Elastic C. Reticular D. Keratin
Simple ________ epithelium occurs where diffusion, osmosis, and filtration are important functions within body organs.
A. pseudostratified ciliated columnar B. squamous C. columnar D. cuboidal