Question 1

If you destroyed the neuromasts in a fish's lateral line,how would you expect this to affect its ability to school?

Accepted Answer

The answer of If you destroyed the neuromasts in a...

Question 2

Receptors located in muscles,tendons,and joints that provide the organism with a sense of body position are called ____________.

Accepted Answer

The answer of Receptors located in muscles,tendons,and joints that provide...

Question 3

In a chemical synapse,when the wave of depolarization reaches the presynaptic membrane,it triggers the release of

Accepted Answer

A) sodium ions. 
B) neurotransmitter molecules. 
C) electricity. 
D) nerve action potentials. 
E) None of the choices is correct.

Question 4

If a nerve to an isolated heart is stimulated and the heartbeat slows,the most reasonable conclusion is that the heart

Accepted Answer

A) is responding to a nerve control that inhibits heartbeat. 
B) is dying since nerves can only stimulate muscle action. 
C) is unaffected by the nerve but responding to some unknown chemical factor. 
D) is normal as all nerve stimulation results in decreased muscle activity. 
E) None of the choices is correct.

Question 5

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

Accepted Answer

A) interio-hormones 
B) pheromones 
C) excretions 
D) releasing stimuli 
E) biological symbol systems

Question 6

Both nerves and hormones serve in biological communication.

Accepted Answer

A) Generally,nerves serve where speed is vital,hormones act slower but have longer-term effects 
B) Both are equally speedy but hormones last longer 
C) Nerve responses are more reliable than chemical and are used for the more important functions 
D) Primitive animals use hormones,advanced ones use nerves 
E) None of the choices is correct

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.

Accepted Answer

A) ampulla 
B) labyrinth 
C) saccule 
D) statocyst 
E) statolith

Question 8

The active transport device whereby sodium is moved from inside the axon to the outside is referred to as the ______ ______.

Accepted Answer

The answer of The active transport device whereby sodium is...

Question 9

The nodes of Ranvier are

Accepted Answer

A) motor nerve terminations on muscle fibers. 
B) tiny vesicles on the postsynaptic membrane of synapses. 
C) interruptions in the myelin sheath surrounding axons. 
D) ganglia in the flatworm nervous system. 
E) the interneurons in our cerebral cortex that allow us to "think."

Question 10

The event at the chemical synapse

Accepted Answer

A) always involves acetylcholine. 
B) always involves some neurotransmitter that stimulates the next neuron. 
C) is a simple continuous "domino" flow of negativity or ions from the axon to the next dendrite. 
D) involves either an inhibitory or stimulating neurotransmitter chemical. 
E) All of the choices are correct.

Question 11

What is the difference between a reflex arc and a reflex act? List the components and functions of each.

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The answer of What is the difference between a reflex...

Question 12

The organ of Corti is

Accepted Answer

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 is correct.

Question 13

Which statement is NOT true about the cells of the nervous system?

Accepted Answer

A) A dendrite is a cytoplasmic extension of a neuron 
B) There may be multiple dendrites on a single cell 
C) A neuroglial cell supports or protects a neuron 
D) A neuron typically has only one axon 
E) All of the above are correct statements

Question 14

What function does the sodium pump play in neural transmission?

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The answer of What function does the sodium pump play...

Question 15

The correct sequence in a reflex arc is

Accepted Answer

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.

Question 16

What keeps a nerve action potential from flowing "backward" in a neuron?

Accepted Answer

A) Schwann cells keep action potentials flowing one direction 
B) Sodium ions can only move toward a synapse 
C) Chemical synapse receptors form a one-way gate and there is a refractory period after sodium ions are pumped back out 
D) The axon and dendrite have completely different membrane structures 
E) All of the choices are correct

Question 17

The efferent nervous system is subdivided into the somatic nervous system and the ________ _________ __________.

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Question 18

Which of the following is NOT a glial cell?

Accepted Answer

A) Microglial cells 
B) Oligodendrocytes 
C) Astrocytes 
D) Neuromasts 
E) Schwann cells

Question 19

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

Accepted Answer

A) White matter 
B) Black matter 
C) Meninges 
D) Yellow matter or corpus amarillo 
E) None of the choices is correct

Question 20

The most common neurotransmitter at synapses in the vertebrate nervous system is __________.

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The answer of The most common neurotransmitter at synapses in...

Exam 33: Nervous Coordination: Nervous System and Sense Organs