Explain the ejection fraction in regards to the heart
What will be an ideal response?
The ejection fraction is the ratio of stroke volume to end-diastolic volume; that is, it is the proportion of the blood in the ventricle that is pumped out. The ejection fraction is often used clinically as an indication of contractility. A healthy heart normally has an ejection fraction of 50% to 75% under resting conditions and may go as high as 90% during strenuous exercise, but a failing heart may pump out 30% or less.
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Which muscle is the one most commonly damaged in a rotator cuff injury?
A. Teres major B. Subscapularis C. Supraspinatus D. Infraspinatus E. Teres minor
Are relaxation of a muscle and inhibition of a muscle the same thing? Explain your answer.
What will be an ideal response?
Which of the following statements regarding pain pathways is FALSE?
A. Substance P is an important neurotransmitter in specific pain pathways. B. Transmission of information in pain pathways may be inhibited by activation of neurons that synthesize opiate neurotransmitters. C. Synaptic activity in afferent neurons associated with pain receptors can be inhibited by axon-axon synapses with neurons from descending pathways. D. Afferents neurons that detect painful stimuli in the skin can converge onto common ascending pathways with neurons that detect painful stimuli in internal organs. E. Substance P is released by neurons descending from the brain, and it inhibits activation of ascending pain pathways.
Both thyroxine and thyroid-stimulating hormone (TSH) are amine hormones
Indicate whether the statement is true or false.