The urinary bladder, identified as ____ in the
above diagram, is separated from the ____ by a
sphincter.
a. A; ureter
b. C; ureter
c. A; urethra
d. C; urethra
e. none of these letters; urethra
D
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High blood pressure in mammals reflexively causes a decrease in heart rate, which results in lowered blood pressure. This is a __________ because ____________
A. negative feedback loop; response to the signal results in a decrease of that signal B. negative feedback loop; response to the signal results in an increase of that signal C. positive feedback loop; response to the signal results in a decrease of that signal D. postive feedback loop; response to the signal results in an increase of that signal E. None of the above are correct.
The portion of the sarcomere indicated by the red box in the photo shows which of the following?
A. overlapping actin and myosin filaments B. a portion of the myosin filaments without any overlapping actin filaments C. a portion of the actin filaments without any overlapping myosin filaments D. the Z disc E. titin filaments
Which of the following is false regarding cnidarians?
A. They have an outer epidermis and inner endodermis, in between which is a gelatinous mesoglea. B. Cnidarians have a wider variety of cells types than sponges—allowing more sophisticated tissue function. C. Many cnidarians are predators rather than passive filter feeders D. Cnidarians have a separate opening for the anus and the mouth.
Garlic contains an antimicrobial substance called (allicin/penicillin/streptomycin).
Fill in the blank(s) with the appropriate word(s).