The highest level of exercise that can be performed without causing a significant change in blood pH is called the
A. Hering-Breuer reflex.
B. aerobic threshold.
C. anaerobic threshold.
D. lactic acid tolerance level.
C
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A muscle whose action opposes that of the prime mover is known as a(n)
A. agonist. B. antagonist. C. synergist. D. extensor.
You have landed a job in a vet clinic that specialized in cardiovascular problems in cats and dogs. You and the vet are looking at an abnormal electrocardiogram, and you suggest it is due to the absence of ion channels in cells that produce the atrioventricular (AV) node delay. If you are right that depolarization spreads rapidly through the conducting system with no AV node delay, what symptoms would you expect to see?
A. Decreased end-diastolic volume leading to decreased cardiac output B. An increase in heart rate C. No depolarization of the atria D. Left and right ventricles won't contract at the same time
A vertebra is considered an irregular bone
Indicate whether the statement is true or false
The bones of the vertebral column form a cavity called the
A. nervous system passageway.?B. abdominal cavity.?C. spinal cavity.?D. vertebral canal.