In neurophysiology, the term "summation" refers to the addition of
A. excitatory neurotransmitter molecules at a receptor.
B. action potentials at the node of Ranvier.
C. postsynaptic potentials at the initial segment.
D. presynaptic hyperpolarizations.
E. resting membrane potentials in a particular area of the brain.
Answer: C
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Which structural feature of the upper limb marks the attachment site of the biceps brachii muscle, a flexor of the forearm?
A) trochlear notch B) deltoid tuberosity C) styloid process D) radial tuberosity E) coronoid process
A person has alkalosis if the blood pH
A) is below 7.0. B) rises above 7.5. C) drops below 7.3. D) is above 7.0.
Sofia signs a covenant not to compete with her employer, Topmost Sales Corporation. A court decides that the covenant is overly restrictive. The court will likely
a. enforce it as written so as not to undercut the freedom of contract. b. enforce it but evaluate its effects over time. c. reform its terms to prevent any undue burden. d. refuse to enforce it unless Topmost pays additional consideration.
Summarize the sliding filament theory
A) It is the theory that sarcomeres lengthen during the sliding of the thin and thick filaments past each other. B) It is the theory that Z lines will move further from each other when the thin and thick filaments slide past each other. C) It is the process that causes an action potential to travel down the T tubules into the sarcolemma. D) It is the theory that excitation-contraction coupling leads to muscle fiber relaxation. E) It is the process of sarcomere shortening caused by the sliding of thin and thick filaments past another.