The serous fluid within the pericardial cavity works to
A. equalize the pressure in the great vessels.
B. lubricate the membranes of the serous pericardium.
C. slow the heart rate.
D. eliminate blood pressure spikes.
Answer: B
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Chemical messengers released directly into the bloodstream, with the ability to affect cells for hours or days, are called ________.
A. neurotransmitters B. dendrites C. hormones D. sensory cells
Which of the following acts on more than 1 digit?
A. abductor pollicis longus B. extensor indicis C. flexor digitorum profundus D. extensor digiti minimi
The major inspiratory muscles—the muscles that contract to accomplish an inspiration during quiet breathing—include the __________ and __________ intercostal muscles
Fill in the blank(s) with correct word
A tissue is a
A. structure contained within a cell. B. lower level of organization than a cell. C. group of organs that performs specific functions. D. group of cells with similar structure and function. E. structure that contains a group of organs.