In an unmyelinated axon, an action potential generates a local current flow that stimulates an action potential in the ____________.
Fill in the blank(s) with the appropriate word(s).
membrane immediately adjacent to the previous action potential
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When two or more polypeptide chains come together to give a protein its ultimate shape, that structure is described as the _________ structure
A. micro- ?B. secondary ?C. quaternary ?D. tertiary ?E. heme group
Which statement best describes the unique features of the pulmonary circulatory system?
A. It is a dual system that accommodates large volumes of blood at low pressure. Bronchial circulation arises from the aorta to nourish lung tissue, whereas the pulmonary circulation brings deoxygenated blood to the gas exchanging units. B. It is a dual system that accommodates large volumes of blood at high pressure. Bronchial circulation arises from the aorta to nourish lung tissue, whereas the pulmonary circulation brings deoxygenated blood to the gas exchanging units. C. It is a dual system that accommodates steady, small volumes of blood at low pressure. Bronchial circulation arises from the aorta to nourish lung tissue, whereas the pulmonary circulation brings deoxygenated blood to the gas exchanging units. D. It is a dual system that accommodates large volumes of blood at low pressure. Bronchial circulation arises from the right ventricle to nourish lung tissue, whereas the pulmonary circulation brings deoxygenated blood to the gas exchanging units.
The pubic symphysis is classified as a
A. cartilaginous joint and a synarthrosis. B. synovial joint and a diarthrosis. C. cartilaginous joint and an amphiarthrosis. D. fibrous joint and an amphiarthrosis. E. fibrous joint and a synarthrosis.
Select the group of bones that comprise the innominate bones.
a. ilium, ischium, pubis b. carpals, metacarpals, phalanges c. ulna, radius, humerus