By definition, skeletal muscles that are located within the actual structure being moved are known as _________________ muscles.
Fill in the blank(s) with correct word.
Ans: intrinsic
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________ are donut-shaped muscles that act as doors to let material in or out.
A. Sphincters B. Intercalated discs C. Aponeuroses D. Primary movers
Damage to the substantia nigra causes a decrease in the neurotransmitter dopamine. This causes a gradual, generalized increase in muscle tone, which is the main symptom of
A) Parkinson's disease. B) rabies. C) Alzheimer's disease. D) myasthenia gravis. E) tetanus.
The neurotransmitter orexin plays a role in:
A) the regulation of metabolism. B) the promotion of sleepiness. C) body temperature regulation. D) the promotion of wakefulness.
The baroreceptor reflex would cause which of the following events to occur if the reflex was caused by an increase in blood pressure?
A. increased parasympathetic stimulation of the heart B. increased heart rate C. increased cardiac output D. increased force of contraction E. increased sympathetic stimulation of the heart