TEST BANK FOR Davis Advantage for Medical-Surgical
Nursing Making Connections to Practice 2nd Edition by
Janice J. Hoffman, Nancy J. Sullivan
When considering cnidarian locomotion what is correct? - ANSWER:Cnidarians are
only mobile in the polyp stage of their life-cycle
Hydras and sea anemones can both move while in the polyp form.
The body wall of a hydra consists of an outer epidermis and an inner gastrodermis
with _______________ between them - ANSWER:mesoglea
The morphological type of cnidarian adapted to a sedentary or sessile life is the
polyp, and the type best adapted for floating or free-swimming existence is the
___________. - ANSWER:medusa
Nematocysts are stinging organelles contained inside cells called
__________________. - ANSWER:cnidocytes
Which statement about Cnidaria is NOT true? - ANSWER:The body plan is tube-
within-a-tube, with a distinct mouth and anus
(THEY HAVE NO SEPERATE ANUS)
Cnidaria - ANSWER:Reproduction is both sexual and asexual.
Some forms are sessile and others are motile.
They live in either marine or freshwater environments.
Tentacles are used to capture prey and put it into the mouth
Sea anemones and corals lack - ANSWER:a medusa stage.
Sea anemones and corals have - ANSWER:a sexual stage.
an asexual stage.
a polyp stage.
The class of radiate animals with the most conspicuous medusa stage is -
ANSWER:scyphozoa.
, Digestion in hydra is - ANSWER:both extracellular and intracellular.
Hydra reproduces asexually by - ANSWER:buds
Throughout most cnidarian groups, the basal or pedal disc serves to -
ANSWER:attach the cnidarian to the substrate.
How does Hydra reproduce sexually? - ANSWER:The polyp body wall can produce
both ovaries and testes that make eggs and sperm, respectively
Cnidarians are found most abundantly in which of the following habitats? -
ANSWER:Shallow marine habitats
Which of the following is NOT a correct description of cnidarian nervous tissues? -
ANSWER:Cnidaria are the first animals to develop a central nervous system.
Which of the following IS a correct description of cnidarian nervous tissues? -
ANSWER:Hydrozoan medusae have ring nerves.
Scyphozoan medusae have marginal sense organs
.
The nerve net synapses with both the nematocysts and the epitheliomuscular cells.
Nematocysts are expelled when the - ANSWER:internal hydrostatic pressure
increases when water enters.
The _____ stage is best adapted for cnidarians living in colonies while the ____ stage
helps in dispersal and survival in open oceans - ANSWER:Polyp, medusa
Which of the following is NOT a cnidarian? - ANSWER:Planaria
Which of the following IS a cnidarian? - ANSWER:Corals
Sea anemones
Hydrozoa
Portuguese man-of-war
The fossil record of Cnidaria is - ANSWER:one of the longest records, with fossils
going back over 700 million years.
Nematocysts are - ANSWER:formed and used only by Cnidaria although a few other
organisms may "steal" them.
The traditional view of Cnidarians relative to germ layers is that Cnidaria possess -
ANSWER:two germ layers, ectoderm and endoderm.
Nursing Making Connections to Practice 2nd Edition by
Janice J. Hoffman, Nancy J. Sullivan
When considering cnidarian locomotion what is correct? - ANSWER:Cnidarians are
only mobile in the polyp stage of their life-cycle
Hydras and sea anemones can both move while in the polyp form.
The body wall of a hydra consists of an outer epidermis and an inner gastrodermis
with _______________ between them - ANSWER:mesoglea
The morphological type of cnidarian adapted to a sedentary or sessile life is the
polyp, and the type best adapted for floating or free-swimming existence is the
___________. - ANSWER:medusa
Nematocysts are stinging organelles contained inside cells called
__________________. - ANSWER:cnidocytes
Which statement about Cnidaria is NOT true? - ANSWER:The body plan is tube-
within-a-tube, with a distinct mouth and anus
(THEY HAVE NO SEPERATE ANUS)
Cnidaria - ANSWER:Reproduction is both sexual and asexual.
Some forms are sessile and others are motile.
They live in either marine or freshwater environments.
Tentacles are used to capture prey and put it into the mouth
Sea anemones and corals lack - ANSWER:a medusa stage.
Sea anemones and corals have - ANSWER:a sexual stage.
an asexual stage.
a polyp stage.
The class of radiate animals with the most conspicuous medusa stage is -
ANSWER:scyphozoa.
, Digestion in hydra is - ANSWER:both extracellular and intracellular.
Hydra reproduces asexually by - ANSWER:buds
Throughout most cnidarian groups, the basal or pedal disc serves to -
ANSWER:attach the cnidarian to the substrate.
How does Hydra reproduce sexually? - ANSWER:The polyp body wall can produce
both ovaries and testes that make eggs and sperm, respectively
Cnidarians are found most abundantly in which of the following habitats? -
ANSWER:Shallow marine habitats
Which of the following is NOT a correct description of cnidarian nervous tissues? -
ANSWER:Cnidaria are the first animals to develop a central nervous system.
Which of the following IS a correct description of cnidarian nervous tissues? -
ANSWER:Hydrozoan medusae have ring nerves.
Scyphozoan medusae have marginal sense organs
.
The nerve net synapses with both the nematocysts and the epitheliomuscular cells.
Nematocysts are expelled when the - ANSWER:internal hydrostatic pressure
increases when water enters.
The _____ stage is best adapted for cnidarians living in colonies while the ____ stage
helps in dispersal and survival in open oceans - ANSWER:Polyp, medusa
Which of the following is NOT a cnidarian? - ANSWER:Planaria
Which of the following IS a cnidarian? - ANSWER:Corals
Sea anemones
Hydrozoa
Portuguese man-of-war
The fossil record of Cnidaria is - ANSWER:one of the longest records, with fossils
going back over 700 million years.
Nematocysts are - ANSWER:formed and used only by Cnidaria although a few other
organisms may "steal" them.
The traditional view of Cnidarians relative to germ layers is that Cnidaria possess -
ANSWER:two germ layers, ectoderm and endoderm.
