Chapter 9 Physio Question and answers
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jellyfish and sea anemones. - correct answer The first multicellular animals to
develop neurons were
A) jellyfish and sea anemones.
B) flatworms and sea urchins.
C) mollusks and sea stars.
D) segmented worms and sea horses.
E) fish and sea monkeys.
nets. - correct answer The first multicellular animals to develop neurons had
structures known as nerve
A) cords.
B) mazes.
C) tracts.
D) webs.
E) nets.
have a ganglion at each segment - correct answer Simple reflexes in a worm
are integrated within a segment rather than in the brain, because worms
A) have a ganglion at each segment.
B) do not have brains.
C) do not have a nervous system.
D) have a neural network within each segment.
,cerebellum and cerebrum - correct answer The brain region can be identified
by its folds and grooves is the
A) cerebrum only.
B) cerebellum only.
C) medulla oblongata only.
D) cerebellum and cerebrum.
E) cerebrum and medulla oblongata
Segmented Worms (Annelids) - correct answer Which of these have the most
advanced nervous system?
A) jellyfish
B) sea anemones
C) flatworms
D) segmented worms
neural plate. - correct answer The earliest embryonic region from which the
entire nervous system eventually develops is the
A) neural crest.
B) ventricle.
C) ependyma.
D) neural tube.
E) neural plate.
neural crest. - correct answer The peripheral nervous system develops from
the
A) neural tube.
B) neural plate.
, C) neural crest.
hindbrain - correct answer The pons develops from the
A) midbrain.
B) hindbrain.
C) forebrain.
cerebral space - correct answer Which of these does NOT contribute
significantly to the protection of the brain?
A) cerebrospinal fluid (CSF)
B) cranium
C) subarachnoid space
D) dura mater
E) cerebral space
choroid plexus - correct answer Cerebrospinal fluid is secreted by the
A) choroid plexus.
B) pia mater.
C) frontal sinuses.
D) arachnoid villi. E) ventricles.
high, 15 - correct answer The brain has a ________ (high or low?) demand
for oxygen, and receives about ________% of the total blood volume in
circulation.
A) high, 50
B) low, 15
C) low, 35
verified to pass 2025
jellyfish and sea anemones. - correct answer The first multicellular animals to
develop neurons were
A) jellyfish and sea anemones.
B) flatworms and sea urchins.
C) mollusks and sea stars.
D) segmented worms and sea horses.
E) fish and sea monkeys.
nets. - correct answer The first multicellular animals to develop neurons had
structures known as nerve
A) cords.
B) mazes.
C) tracts.
D) webs.
E) nets.
have a ganglion at each segment - correct answer Simple reflexes in a worm
are integrated within a segment rather than in the brain, because worms
A) have a ganglion at each segment.
B) do not have brains.
C) do not have a nervous system.
D) have a neural network within each segment.
,cerebellum and cerebrum - correct answer The brain region can be identified
by its folds and grooves is the
A) cerebrum only.
B) cerebellum only.
C) medulla oblongata only.
D) cerebellum and cerebrum.
E) cerebrum and medulla oblongata
Segmented Worms (Annelids) - correct answer Which of these have the most
advanced nervous system?
A) jellyfish
B) sea anemones
C) flatworms
D) segmented worms
neural plate. - correct answer The earliest embryonic region from which the
entire nervous system eventually develops is the
A) neural crest.
B) ventricle.
C) ependyma.
D) neural tube.
E) neural plate.
neural crest. - correct answer The peripheral nervous system develops from
the
A) neural tube.
B) neural plate.
, C) neural crest.
hindbrain - correct answer The pons develops from the
A) midbrain.
B) hindbrain.
C) forebrain.
cerebral space - correct answer Which of these does NOT contribute
significantly to the protection of the brain?
A) cerebrospinal fluid (CSF)
B) cranium
C) subarachnoid space
D) dura mater
E) cerebral space
choroid plexus - correct answer Cerebrospinal fluid is secreted by the
A) choroid plexus.
B) pia mater.
C) frontal sinuses.
D) arachnoid villi. E) ventricles.
high, 15 - correct answer The brain has a ________ (high or low?) demand
for oxygen, and receives about ________% of the total blood volume in
circulation.
A) high, 50
B) low, 15
C) low, 35
