Question 1

Which of the following wraps the spinal canal in three layers?
A) White matter
B) Black matter
C) Meninges
D) Yellow matter or corpus amarillo
E) None of the choices are correct

Accepted Answer

The meninges are three protective layers that wrap around the spinal canal and brain. They consist of the dura mater (outermost layer), the arachnoid mater (middle layer), and the pia mater (innermost layer).

Question 2

If we crossed over the nerves leading from the eye and from the ear before they reached the appropriate section of the brain,what would happen?
A) Nerves send vision at the speed of light, hearing at the speed of sound, etc.
B) The main difference is in the origin and destination of the nerves involved so the experiment above would "see" flashes of loud noises and "hear" bright light.
C) The code sent along the nerves from vision is a different dot-and-dash sequence from the action potentials from hearing.
D) They are completely different types of nerve cells and send different action potentials.
E) None of the choices are correct.

Accepted Answer

If the nerves leading from the eye and from the ear were crossed over before they reached the appropriate section of the brain, the brain would receive reversed signals. This would result in "seeing" flashes of loud noises and "hearing" bright light because the main difference between the two types of nerves is their origin and destination, and their signals would be interpreted by the opposite section of the brain.

Question 3

The sense of smell is
A) coded by genes with each of 500-1000 genes coding for a separate odor receptor.
B) poor in humans when compared to other mammals such as dogs.
C) detected with olfactory endings in a special epithelium covered by a thin film of mucus deep in the nasal cavity.
D) analyzed by olfactory cortex that is connected to centers of emotions.
E) All of the choices are correct.

Accepted Answer

All of the choices are correct. The sense of smell is coded by genes with each of 500-1000 genes coding for a separate odor receptor. It is poor in humans when compared to other mammals such as dogs. It is detected with olfactory endings in a special epithelium covered by a thin film of mucus deep in the nasal cavity. It is analyzed by olfactory cortex that is connected to centers of emotions.

Question 4

Internal chemicals communicate from one organ to another target organ or tissue.However,_________ are chemicals released by individuals to influence the behavior of other members of their own species
A) interio-hormones
B) pheromones
C) excretions
D) releasing stimuli
E) biological symbol systems

Accepted Answer

Pheromones are chemicals released by individuals to influence the behavior of other members of their own species. Interio-hormones are not a recognized term in biology, excretions are not specifically released for communication purposes, releasing stimuli is not a recognized term in biology, and biological symbol systems are not related to chemical communication.

Question 5

A nerve signal is a rapidly moving change in electrical potential called the ______ ______.

Accepted Answer

The answer of A nerve signal is a rapidly moving...

Question 6

The myelin sheath that insulates the axon is formed by special glial cells called ______ ______.

Accepted Answer

The answer of The myelin sheath that insulates the axon...

Question 7

The crayfish has a cavity or ___________ lined with sensory seta or hairs.A grain in the cavity is pulled downward by gravity; the pressure against the bottom hairs of the cavity gives the crayfish a perception of being upright and when it changes orientation,the grain touches side hairs that make it realize it is not upright.Thus the crayfish "knows" which way is up in the dark.
A) ampulla
B) labyrinth
C) saccule
D) statocyst
E) statolith

Accepted Answer

The cavity described in the passage is the statocyst, which is lined with sensory seta/hairs and contains a small grain (statolith) that helps the crayfish sense its orientation in the absence of visual cues.

Question 8

A fly will start its wings flapping if its feet are not touching the ground,and stop its wings when its feet touch the ground,even when its head has been cut off.This "decision" to fly has therefore been made by
A) interneurons in the ganglia.
B) the wing and foot muscles themselves.
C) motor nerves.
D) sensory nerves.
E) the fly's brain.

Accepted Answer

The fly's decision to fly based on whether its feet are touching the ground is controlled by interneurons in the ganglia, which are clusters of nerve cells located throughout the fly's body. These interneurons process sensory information from the fly's feet and trigger the muscles in the wings to start flapping when the feet are not touching the ground. Once the feet touch the ground, the interneurons stop sending signals to the wing muscles, causing them to stop flapping. This process does not involve the fly's brain, as it can still flap its wings even when its head has been cut off.

Question 9

You are watching a horror movie,and you notice that your heart is beating fast,your mouth is dry,you are breathing rapidly.What division of the nervous system is directly responsible for these reactions?
A) Spinal since this is a reflex arc between sensory and motor nerves
B) The sympathetic nervous system which is responsible for the fight-or-flight reactions to emergency situations
C) The cerebellum which maintains all unconscious control
D) The forebrain where symbols are interpreted
E) None of the choices are correct

Accepted Answer

The sympathetic nervous system is responsible for the physiological changes associated with fight-or-flight responses, which include increased heart rate, dry mouth, and rapid breathing. These responses are triggered during stressful or emergency situations, such as watching a horror movie. The other options are not directly responsible for these physiological changes.

Question 10

A cat learns to walk and take steps when young without having to think through "lift-paw-move-leg-set-down-paw" because the sequence has been practiced and coordinated automatically in it's
A) autonomic nervous system.
B) cerebellum.
C) brain stem.
D) cerebrum.
E) spine.

Accepted Answer

The answer of A cat learns to walk and take...

Question 11

Non-neuron cells that outnumber neurons but are very important in neuron function are ____________ or glial.

Accepted Answer

The answer of Non-neuron cells that outnumber neurons but are...

Question 12

The correct sequence in a reflex arc is
A) receptor, efferent nerve, nerve center, afferent nerve, effector.
B) effector, afferent nerve, nerve center, efferent nerve, receptor.
C) receptor, afferent nerve, nerve center, efferent nerve, effector.
D) effector, efferent nerve, nerve center, afferent nerve, receptor.
E) All of the choices are correct.

Accepted Answer

The sequence in a reflex arc is receptor, afferent nerve, nerve center, efferent nerve, and effector. The receptor detects a stimulus, which is then transmitted to the nerve center via the afferent nerve. The nerve center processes the information and sends a response via the efferent nerve to the effector, which carries out the response. Choice C is the only option that lists the steps in the correct order.

Question 13

An animal with a simple net-like nervous system is the
A) earthworm.
B) dog.
C) cnidarian hydra.
D) molluscan octopus.
E) flatworm.

Accepted Answer

Cnidarian hydra have a simple network of nerve cells that form a nerve net, allowing them to respond to their environment and coordinate basic behaviors such as movement and feeding. The other options all have more complex nervous systems.

Question 14

The brain of early fishes consisted of three principal regions called
A) pons, cerebellum, cerebrum.
B) prosencephalon, mesencephalon, and rhombencephalon.
C) protoganglia, mesoganglia, and metaganglia.
D) ichthyospinal region, ichthyocerebrum, and ichthyocerebellum.
E) premedulla, medulla oblongata, and postmedulla.

Accepted Answer

The brain of early fishes consisted of three principal regions called prosencephalon (forebrain), mesencephalon (midbrain), and rhombencephalon (hindbrain). This is a common classification in vertebrate embryology and anatomy.

Question 15

The part of the brain responsible for deep seated drives such as sex,hunger,thirst,anger and pleasure is the
A) medulla oblongata.
B) reticular formation.
C) parasympathetic system.
D) limbic system.
E) None of the choices are correct since these all originate in endocrine glands

Accepted Answer

The limbic system is the set of brain structures responsible for emotions, motivation, and memory. It includes the hypothalamus, amygdala, and hippocampus among other structures. These brain regions are responsible for deep-seated drives such as sex, hunger, thirst, anger, and pleasure.

Question 16

Pacinian corpuscles adjusting to new shapes,no longer responding to constant pressure,is a condition called
A) adaptation.
B) fatigue.
C) timbre.
D) inhibition.
E) redundancy.

Accepted Answer

Pacinian corpuscles are sensory receptors responsible for detecting pressure and vibration. When these corpuscles are exposed to constant pressure, they will adapt to the new shape and no longer respond as strongly to the pressure stimulus. This adaptation is important to prevent sensory overload and ensure that the corpuscles can continue to detect changes in pressure and vibration over time. Therefore, the correct term to describe this condition is adaptation.

Question 17

The organ of Corti is
A) the internal part of the cochlea with hair cells that are stimulated by sound waves.
B) the part of the eye that contains rods, cones, and bipolar cells.
C) the point of the eye at which color vision is most acute.
D) part of the inner ear which recognizes dynamic equilibrium and movement.
E) None of the choices are correct.

Accepted Answer

The organ of Corti is located in the cochlea of the inner ear and contains specialized hair cells that are stimulated by sound waves, helping to detect and transmit auditory information to the brain.

Question 18

Which statement about the conscious brain is NOT correct?
A) The conscious brain is contained within the cerebrum
B) The corpus callosum is the bridge that connects the two cerebral hemispheres
C) The cerebral cortex is composed of gray matter, with cell bodies and unmyelinated neurons
D) The limbic system is a center for mathematical ability and other non-emotional activities
E) Association areas of each lobe of the cerebrum receive information from other parts of the brain and integrate the information into higher levels of consciousness

Accepted Answer

The limbic system is actually a group of structures involved in emotions, memory and motivation, not mathematical ability or other non-emotional activities.

Question 19

Which statement is NOT true about the autonomic nervous system?
A) The autonomic nervous system is a completely motor system
B) The functions of the autonomic system are generally involuntary and subconscious
C) The sympathetic nervous system deals with "fight or flight" responses
D) The parasympathetic nervous system promotes actions associated with relaxation
E) The neurotransmitter associated with the parasympathetic system is norepinephrine

Accepted Answer

The neurotransmitter associated with the parasympathetic system is actually acetylcholine, not norepinephrine.

Question 20

The fovea centralis is
A) part of the choroid coat of the eye that is attached to the lens and the iris.
B) the internal part of the cochlea with hair cells that are stimulated by sound waves.
C) any part of the eye that contains rods, cones, and bipolar cells.
D) the point of the eye at which color vision is most acute.
E) the part of the inner ear which recognizes dynamic equilibrium and movement

Accepted Answer

The fovea centralis is a small, central pit in the retina of the eye that is responsible for sharp, detailed and color vision. It contains a high concentration of cone cells that are responsible for color vision and visual acuity.

Quiz 33: Nervous Coordination: Nervous System and Sense Organs

Which of the following wraps the spinal canal in three layers?

If we crossed over the nerves leading from the eye and from the ear before they reached the appropriate section of the brain,what would happen?

The sense of smell is

Internal chemicals communicate from one organ to another target organ or tissue.However,_________ are chemicals released by individuals to influence the behavior of other members of their own species

A nerve signal is a rapidly moving change in electrical potential called the .

The myelin sheath that insulates the axon is formed by special glial cells called .

A fly will start its wings flapping if its feet are not touching the ground,and stop its wings when its feet touch the ground,even when its head has been cut off.This "decision" to fly has therefore been made by

You are watching a horror movie,and you notice that your heart is beating fast,your mouth is dry,you are breathing rapidly.What division of the nervous system is directly responsible for these reactions?

A cat learns to walk and take steps when young without having to think through "lift-paw-move-leg-set-down-paw" because the sequence has been practiced and coordinated automatically in it's

Non-neuron cells that outnumber neurons but are very important in neuron function are ____________ or glial.

The correct sequence in a reflex arc is

An animal with a simple net-like nervous system is the

The brain of early fishes consisted of three principal regions called

The part of the brain responsible for deep seated drives such as sex,hunger,thirst,anger and pleasure is the

Pacinian corpuscles adjusting to new shapes,no longer responding to constant pressure,is a condition called

The organ of Corti is

Which statement about the conscious brain is NOT correct?

Which statement is NOT true about the autonomic nervous system?

The fovea centralis is