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

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

Garlic contains an antimicrobial substance called (allicin/penicillin/streptomycin).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology