The concentration of a particular antibody within the blood is referred to as the antibody ________
Fill in the blank with correct word.
titer
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An action potential on a neuron develops when
a. threshold voltage is reached on an axon b. voltage-gated Na+ channels open c. spatial or temporal summation of graded potentials occurs to a great enough degree d. the axon hillock reaches threshold voltage e. any of the above events occur
During surgical treatment of portal hypertension in a 59-year-old man with liver cirrhosis, a surgeon inadvertently lacerates the dilated paraumbilical veins. The veins must be repaired to allow collateral flow. Which of the following ligaments is most likely severed?
(A) Lienorenal ligament (B) Lienogastric ligament (C) Gastrophrenic ligament (D) Ligamentum teres hepatis (E) Ligamentum venosum
Microtubules
A. are a component of mitochondria. B. are the smallest components of the cytoskeleton. C. provide structure and support to the cytoplasm. D. contain the protein myosin. E. are solid, supporting rods of protein.
In a crossed-extensor reflex, if the right arm was grabbed it would flex and the left arm would ________
A) abduct B) also flex C) extend D) adduct