Which muscle originate on the phalanges?
A) All the wrist flexors.
B) All the wrist extensors.
C) No muscles originate on the phalanges.
D) All the wrist adductors.
E) All the wrist abductors.
Answer: C
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Multiple wave summation
A. is a time during which the tissue cannot respond again. B. results in complete and incomplete tetanus. C. is a condition in which the muscle fiber only partially relaxes between contractions. D. is a condition in which stimuli occur so rapidly that there are no intervening relaxations. E. is a constant tension produced by muscles for long periods of time.
In compact bone, ________ connect adjacent lacunae, thereby providing pathways for nutrients and other materials to pass between osteocytes.
A. lamellae B. perforating canals C. blood vessels D. osteonic canals E. canaliculi
In a typical atom with three positively charged protons, how many negatively charged protons would be present?
A) 4 B) 1 C) 3 D) 0
Regarding blood volume reflexes, "filling time" is defined as the
A) amount of blood ejected by a ventricle during a single beat. B) flow of venous blood into the right atrium. C) amount of blood pumped by the left ventricle in one minute. D) duration of atrial systole. E) duration of ventricular diastole.