Ch. 48 & 49 Flashcards

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1
Q

A neuron that transmits an impulse to the central nervous system after the neuron is stimulated by the environment is called

A

Sensory neuron

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2
Q

Which of the following is specifically a part or a function of the central nervous system

A

Integration

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3
Q

The part of a neuron that carries nerve impulses toward the cell body

A

A dendrite

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4
Q

Schwann cells produce

A

Myelin sheath

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5
Q

Which one of the following is a false statement about the resting membrane potential

A

The concentration of sodium is much higher inside the cell than outside

(It’s higher outside. 3 Na+ out. 2 K+ in.)

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6
Q

An action potential is

A

A traveling wave of depolarization in the neuron membrane

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7
Q

Which one of the following statements about the transmission across a typical chemical synapse is false

A

Vesicles containing neurotransmitter diffuse to the receiving cells plasma membrane

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8
Q

A natural pain reliever

A

Endorphin

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9
Q

Which one of the following structures are included in the peripheral nervous system

A

Afferent neurons

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10
Q

Which of the following are included in the mammalian forebrain

A

Thalamus
Hypothalamus
Cerebrum

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11
Q

Alex becomes so dehydrated while playing tennis that his blood pressure starts to drop. His _____ detects the drop in pressure and sends nerve signals to speed up the heart to compensate

A

Medulla oblongata

Regulates breathing, circulation, digestion

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12
Q

A man is admitted to the hospital suffering from an abnormally low body temp, loss of appetite, and extreme thirst. A brain scan shows a tumor in the ____

A

Hypothalamus

Regulates body temp, reproduction, and eating

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13
Q

The Limbic system is involved in

A

Emotion and memory

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14
Q

Which would be present in an animal with a nerve net?

A

Neurons

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15
Q

Which of the following is responsible for repolarization in an action potential

A

Opening of potassium gates

Opening of sodium gates is depolarization

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16
Q

In many animals the sequence of cells and neurons that receive and transmit information to produce a response to a stimulus is

A
Receptor 
Sensory
Interneuron
Motor
Effector
17
Q

A motor neuron axon (nerve fiber) that has a ______ will conduct information the fastest and produce the quickest reflex response to a stimulus

A

Large diameter and myelin sheath

18
Q

Not a class of neurotransmitters

A

Polysaccharides

(Classes are:
Acetylcholine
Biogenic 
Amino acids
Neuropeptides
Gases)
19
Q

_____ is solely an inhibitory type of neurotransmitter that causes ______ of the membrane of the receiving cell

A

GABA
hyperpolarization

(Acetylcholine is an excitatory NT that promotes depolarization)

20
Q

Glial cells that fight infections in the nervous system

A

Microglia