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Human Bio > Chapter 11 > Flashcards

Chapter 11 Flashcards

0
Q

Which of the following influences the speed of an action potential

A

Both the presence of myelin sheath and the diameter of Axon

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1
Q

Which of the following statements correctly characterize an action potential

A

Action potentials are initiated by depolarization of the membrane to threshold

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2
Q

Which of the following cell types makes up the majority of cells in the nervous system

A

Neuroglial cells

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3
Q

What do multiple sclerosis and ALS have in common

A

They both damage the myelin sheath, slowing action potential transmission.

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4
Q

All of the following are directly involved in synaptic transmission except

A

Voltage sensitive ion channels in the post synaptic membrane.

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5
Q

An _______ neurotransmitter causes _______ of the post synaptic membrane.

A

Both b and c

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6
Q

Information coming into the central nervous system arrives via ________ while information going from the central nervous system to the muscles glands and organs travel via ________

A

Sensory neurons

Motor neurons

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7
Q

The brain and spinal cord make up the

A

Central nervous system

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8
Q

A spinal reflects requires the participation of each of the following except

A

Cerebral cortex

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9
Q

Which of the following would cause an acceleration of heart rate and increase in blood pressure and a slowing of digestive processes

A

Sympathetic division of the autonomic nervous system

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10
Q

Which part of the brain is responsible for regulating the heart and respiratory rates and blood pressure

A

Medulla oblongata

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11
Q

The coordination necessary for musicians to play the piano depends on control exerted by the

A

Cerebellum

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12
Q

All the following are associated with storage of long-term memory except

A

Limbic system

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13
Q

Which of the following is characteristic of psycho active drugs

A

The altar levels of neurotransmitters

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14
Q

Which of the following statements regarding infections of the nervous system is accurate

A

Bacterial meningitis is generally more severe than viral meningitis

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15
Q

Which of the following ions are directly involved in the generation of an action potential

A

Sodium ions and potassium ions

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16
Q

An action potential will be generated when the sum of all graded potentials reaches

A

Threshold

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17
Q

The action of neurotransmitters is very fleeting due to their prompt removal from the synthetic cleft all of the following are strategies for rapid removal of neurotransmitters except

A

Rapid uptake of the neurotransmitter by the postsynaptic neuron

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18
Q

Short-term memory occurs in

A

The limbic system

19
Q

Excitatory neurotransmitters ______

A

Result in depolarization of the postsynaptic membrane

20
Q

What event at the axon terminal’s is stimulated by the action potential

A

The release of a no transmitter in the synapse

21
Q

Which neuroglial cells form the myelin sheath on axon in the CNS and are attacked and lost in the disease multiple sclerosis

A

Oligodendrocytes

22
Q

Which of these statements concerning psychoactive drugs is false

A

Psychoactive drugs cannot cross the blood brain barrier

23
Q

Central nervous system _____

A

Receives processes and stores information

24
Q

Where is cerebrospinal fluid found in the brain

A

In the ventricles and between the arachnoid and pis mater

25
Q

Parkinson’s disease is caused by

A

A shortage of dopamine

26
Q

What ion enters the axon terminus during an action potential and results in the release of neurotransmitter in the synapse

A

Calcium ions

27
Q

When one neuron transmits an impulse to many neurons this is known as

A

Divergence

28
Q

The ability to use and understand language make decisions and engage in conscience thought are located in the

A

Thalamus

Cerebrum

29
Q

Young boy receives an injury to the back of his head and is now having problems with balance. What area of the brain has probably been injured

A

Cerebellum

30
Q

The motor division of the PNS carries info from the CNS

A

True

31
Q

Dendrites are slender extensions of the cell body that carry information away from the cell body of the neuron

A

False

32
Q

The meninges are four chambers in the brain that are filed with cerebrospinal fluid

A

False

33
Q

Motor neurons serving smooth and cardiac muscle are part of the somatic nervous system

A

False

34
Q

Psychoactive drugs may act by altering the concentration of no transmitters in the brain

A

True

35
Q

Spinal reflexes are voluntary responses to stimuli and often act to protect the body

A

False

36
Q

The hidden brain is the region that receives and integrates sensory input from the external environment and determines most of our more complex behavior

A

False

37
Q

Inhibitory neurotransmitters cause the hyperpolarization of the postsynaptic cell

A

True

38
Q

Alzheimer’s disease is a disorder of memory impairment and Parkinson’s disease affects physical activity

A

True

39
Q

Schwann cells produce a carbohydrate like insulating material called myelin

A

False

40
Q

The hypothalamus maintains homeostasis and regulates temperature control, water balance

A

True

41
Q

The reticular activating system is located near the base of the forebrain and influences emotions

A

False

42
Q

The resting membrane potential of is when the inside of the neuron is more negatively charged in the outside of the neuron

A

True

43
Q

An action potential is a sudden temporary reversal of voltage difference across the cell membrane of neuron

A

True

44
Q

The sympathetic division of the automatic nervous system is responsible for the fight or flight response.

A

True

Human Bio (13 decks)

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