The two types of sympathetic receptors are ________ and beta.
Fill in the blank(s) with the appropriate word(s).
alpha
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Movement of a body part toward the main axis of the body is called
A. abduction. B. flexion. C. inversion. D. retraction. E. adduction.
Salt was added to a beaker of distilled water (the water was not stirred). A sample taken from the bottom of the beaker was found to be 20% salt. At the same time, a sample taken from the top of the beaker was found to be 2% salt. After 24 hours
A. the samples would still be 2% and 20% respectively. B. the difference in the percentage of salt between the top and bottom samples would increase. C. the salt would float to the top. D. the percentage of salt in the top and bottom samples would be approximately equal. E. None of the choices are correct.
Which is not correct regarding lymph nodes?
A. They are covered by a connective tissue capsule. B. They contain a network of lymphatic sinuses. C. Each node has an outer cortex and inner medulla. D. Connective tissue bands called tendineae divide nodes. E. Lymphatic nodules produce lymphocytes.
As blood is pumped out of the heart and into the major arteries leaving the heart, it
A. pushes against the atrioventricular valves and opens them. B. fills the cusps of the semilunar valves, causing them to expand and block the backflow of blood C. pushes against the semilunar valves and opens them. D. fills the cusps of the atrioventricular valve causing opening of the bicuspid and closure of the tricuspid. E. pushes against the semilunar valves and closes them.