Action potentials pass from one myocardial cell to another through areas of low electrical resistance called
A. gap junctions.
B. fibrous heart rings.
C. electromagnetic discs.
D. sarcolemma sclerotic plaques.
E. tight junctions.
A
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If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, ________.
A) threshold is reached more quickly and heart rate would increase B) potassium channels compensate and no change in heart rate would occur C) heart rate would decrease, but blood pressure would rise due to the excess sodium present D) tetanic contraction would occur due to the short absolute refractory period of cardiac muscle
The __________ nerve controls the intrinsic tongue muscles.
Fill in the blank(s) with the appropriate word(s).
True or False? A neonate who has a blue tint to her skin, has a pulse of less than 100 bpm, and has an irregular rate of breathing could score an APGAR score of 8.
Answer the following statement true (T) or false (F)
An articular capsule is present in
A. fibrous joints. B. fibrous joints and cartilaginous joints. C. synovial joints. D. fibrous joints and synovial joints. E. all joints.