Question 1

Information gathering from the environment by a vertebrate is aided by which of the following?

Accepted Answer

A)   paired eyes, ears, and olfactory structures
B)   cephalization
C)   bilateral symmetry with a vast increase in the number of neurons
D)   All of the choices are information gathering aids.E) A) and B)
F) C) and D)

Question 2

Examine the picture to answer the following questions and identify the labeled structures.  
A: _____
B: _____
C: _____
D: _____

Accepted Answer

E: Is the neuron pictured a sensory, ass...

Question 3

The likely effect on a neuron of two excitatory signals and twenty inhibitory signals is

Accepted Answer

A)   transmission of a nerve impulse.
B)   transmission of a nerve impulse releasing inhibitory neurotransmitters at the next synapse.
C)   prohibiting the axon from firing.
D)   confused integration.E) B) and C)
F) C) and D)

Question 4

Ion concentration differences produce an action potential creating a stimulus. The difference between a weak stimulus and an intense stimulus is

Accepted Answer

A)   the action potential is graduated and a weak stimulus causes a small change in polarity.
B)   weak stimuli only open sodium gates, strong stimuli also open potassium gates.
C)   the frequency at which an axon fires.
D)   a strong stimulus does not allow repolarization but sends a constant flow of ions.
E)   All of the choices are correct.F) A) and E)
G) D) and E)

Question 5

At a synapse,

Accepted Answer

A)   synaptic vesicles fuse with the postsynaptic membrane.
B)   synaptic vesicles fuse with the pre-synaptic membrane.
C)   neurotransmitters diffuse across the synaptic cleft.
D)   neurotransmitters are actively transported across the synaptic cleft.
E)   synaptic vesicles fuse with the pre-synaptic membrane and neurotransmitters diffuse across the synaptic cleft.F) B) and C)
G) A) and D)

Question 6

Draw a graph of an action potential that illustrates voltage changes over time. Define and indicate where depolarization and repolarization occurs. Include and label the region of resting potential, action potential and the threshold. Also describe what occurs in terms of ion movement across the membrane to initiate an action potential and during the action potential.

Accepted Answer

A sample graph of an action potential is...

Question 7

When you are studying with the TV on, which part of the brain filters out unnecessary sensory stimuli so that you can focus on your studies?

Accepted Answer

A)   hypothalamus
B)   cerebellum
C)   reticular activating system
D)   limbic system
E)   basal nucleiF) C) and D)
G) A) and C)

Question 8

Starting with the simplest and moving towards more complex, what is the correct evolutionary sequence of animals in regards to the complexity of their nervous systems?

Accepted Answer

A)   sponges - hydras - planarians - annelids - molluscs - fish
B)   sponges - planarians - hydras - annelids - molluscs - fish
C)   hydras - sponges - planarians - annelids - molluscs - fish
D)   sponges - hydras - planarians - molluscs - annelids - fish
E)   annelids - sponges - hydras - planarians - molluscs - fishF) D) and E)
G) C) and D)

Question 9

An animal with a ladder like nervous system is the

Accepted Answer

A)   earthworm.
B)   cat.
C)   hydra.
D)   octopus.
E)   planarian.F) A) and E)
G) A) and D)

Question 10

The enzyme that breaks down acetylcholine within the synaptic cleft is

Accepted Answer

A)   acetylcholinesterase.
B)   monoamine oxidase.
C)   GABA.
D)   lipase.
E)   maltase.F) A) and B)
G) A) and C)

Question 11

An animal with a brain and a single ventral solid nerve cord is the

Accepted Answer

A)   earthworm.
B)   cat.
C)   hydra.
D)   octopus.
E)   planarian.F) D) and E)
G) B) and D)

Question 12

What happens if an insect is sprayed with a common insecticide that destroys the ability of acetylcholinesterase to recycle acetylcholine?

Accepted Answer

A)   The lack of recycled acetylcholine brings cell metabolism to a halt.
B)   The insect loses control of body functions as nerve impulses flow continuously.
C)   This prevents the synapse from restoring its ability to "reset" itself for the next impulse.
D)   All of the above are correct.
E)   The synapse is prevented from restoring its ability to "reset" itself for the next impulse and the insect loses control of body functions as nerve impulses flow continuously.F) B) and E)
G) A) and E)

Question 13

The primary functions of the spinal cord are

Accepted Answer

A)   to integrate intelligence with primal instinct and to coordinate memory.
B)   to coordinate speech, taste, smell, vision, and hearing.
C)   to serve as a center for reflex actions and to facilitate communication between the brain and spinal nerves.
D)   controlling muscle activity and maintaining balance.
E)   local control and decision-making for local anatomy.F) B) and E)
G) C) and D)

Question 14

Which of the following statements about an action potential is NOT true?

Accepted Answer

A)   Repolarization occurs when potassium leaves the axon.
B)   There is a rapid change in polarity from about -65 mV to about +40 mV during depolarization.
C)   An action potential takes 2 to 5 seconds.
D)   Depolarization occurs when sodium gates open and allow sodium ions to enter the axon.
E)   Potassium gates open after the sodium gates and allow potassium ions to leave the cell.F) C) and D)
G) A) and B)

Exam 37: Neurons and Nervous Systems

An animal with a brain and a single ventral solid nerve cord is the

Correct Answer
verified

Which of the following statements about an action potential is NOT true?

Correct Answer
verified

Correct Answer
verified
A sample graph of an action potential is...
View Answer

Starting with the simplest and moving towards more complex, what is the correct evolutionary sequence of animals in regards to the complexity of their nervous systems?

Correct Answer
verified

At a synapse,

Correct Answer
verified

The primary functions of the spinal cord are

Correct Answer
verified

The enzyme that breaks down acetylcholine within the synaptic cleft is

Correct Answer
verified

Information gathering from the environment by a vertebrate is aided by which of the following?

Correct Answer
verified

Ion concentration differences produce an action potential creating a stimulus. The difference between a weak stimulus and an intense stimulus is

Correct Answer
verified

An animal with a ladder like nervous system is the

Correct Answer
verified

When you are studying with the TV on, which part of the brain filters out unnecessary sensory stimuli so that you can focus on your studies?

Correct Answer
verified

The likely effect on a neuron of two excitatory signals and twenty inhibitory signals is

Correct Answer
verified

Examine the picture to answer the following questions and identify the labeled structures. A: ___ B: _ C: _ D: ___

Correct Answer
verified
E: Is the neuron pictured a sensory, ass...
View Answer

What happens if an insect is sprayed with a common insecticide that destroys the ability of acetylcholinesterase to recycle acetylcholine?

Correct Answer
verified

Exam 37: Neurons and Nervous Systems

An animal with a brain and a single ventral solid nerve cord is the

Correct AnswerverifiedShow Answer

Which of the following statements about an action potential is NOT true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA sample graph of an action potential is...View AnswerShow Answer

Starting with the simplest and moving towards more complex, what is the correct evolutionary sequence of animals in regards to the complexity of their nervous systems?

Correct AnswerverifiedShow Answer

At a synapse,

Correct AnswerverifiedShow Answer

The primary functions of the spinal cord are

Correct AnswerverifiedShow Answer

The enzyme that breaks down acetylcholine within the synaptic cleft is

Correct AnswerverifiedShow Answer

Information gathering from the environment by a vertebrate is aided by which of the following?

Correct AnswerverifiedShow Answer

Ion concentration differences produce an action potential creating a stimulus. The difference between a weak stimulus and an intense stimulus is

Correct AnswerverifiedShow Answer

An animal with a ladder like nervous system is the

Correct AnswerverifiedShow Answer

When you are studying with the TV on, which part of the brain filters out unnecessary sensory stimuli so that you can focus on your studies?

Correct AnswerverifiedShow Answer

The likely effect on a neuron of two excitatory signals and twenty inhibitory signals is

Correct AnswerverifiedShow Answer

Examine the picture to answer the following questions and identify the labeled structures. A: _____ B: _____ C: _____ D: _____

Correct AnswerverifiedE: Is the neuron pictured a sensory, ass...View AnswerShow Answer

What happens if an insect is sprayed with a common insecticide that destroys the ability of acetylcholinesterase to recycle acetylcholine?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A sample graph of an action potential is...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Examine the picture to answer the following questions and identify the labeled structures. A: ___ B: _ C: _ D: ___

Correct Answer
verified
E: Is the neuron pictured a sensory, ass...
View Answer

Correct Answer
verified