Which of the following is NOT true of glial cells?
A. They form the myelin for axons.
B. Neurons outnumber glial cells 10 to 1 in the nervous system.
C. They deliver fuel molecules to neurons and remove the waste products of metabolism.
D. They are important for the growth and development of the nervous system.
E. They regulate the composition of the extracellular fluid in the CNS.
B
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The ________ nerve carries impulses to the diaphragm
A) Phrenic B) Diaphragmatic C) Vagus D) Thoracic
When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it tell you about the muscle?
A) The muscle has two, three, or four origins, respectively. B) The muscle is able to change direction twice, three times, or four times faster than other muscles, respectively. C) The muscle has two, three, or four functions, respectively. D) The muscle has two, three, or four insertions, respectively.
What is the effect of turbulence of the air passing between the vestibule and the nasal chamber?
A) The effect is negligible. B) It allows extra time for warming and humidifying incoming air. C) It prevents air filtration. D) It decreases the volume of air entering, to prevent possible damage to delicate respiratory surfaces by too rapid a rate of airflow. E) None of the answers are correct.
In the classical pathway of complement activation,
A. complement is activated within liver cells and released into the blood. B. complement binds to an antibody that is bound to a foreign substance. C. complement binds with polysaccharides on a microbial cell wall. D. complement inhibits inflammation and binds to opsonins.