Question 11 pts   _____ axons appear white

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Question 11 pts

 

_____ axons appear white.

Group of answer choices

immature

 

damaged

 

myelinated

 

unmyelinated

 

 

Flag question: Question 2Question 21 pts

 

Gaps between Schwann cells, on which impulses "jump" (increasing speed of impulse), are called

Group of answer choices

dendrites

 

Nissl bodies

 

nodes of Ranvier

 

oligodendrocytes

 

 

Flag question: Question 3Question 31 pts

 

______ are efferent, meaning that they carry impulses from the central nervous system (CNS) to effectors (glands and muscles).

Group of answer choices

bipolar

 

sensory neurons

 

motor neurons

 

interneurons

 

 

Flag question: Question 4Question 41 pts

 

Which of the following correctly describes the inside of a neuron in relation to the outside environment when it is not receiving or transmitting an impulse (this is said to be resting potential)?

Group of answer choices

there are more sodium ions on the inside of the neuron

 

the inside of the neuron is positive compared to the outside of the neuron

 

the inside of the cell is negative compared to the outside of the cell

 

the voltage is the same inside the cell as it is outside the cell

 

 

Flag question: Question 5Question 51 pts

 

Impulses travel faster on

Group of answer choices

unmyelinated axons

 

myelinated axons

 

interneurons that sensory neurons

 

 

Flag question: Question 6Question 61 pts

 

Which of the following represents the voltage that causes a neuron to reach threshold?  (this number describes the inside of the cell relative to the environment outside the cell)

Group of answer choices

0 mv

 

-65 mv

 

-70 mv

 

-55 mv

 

 

Flag question: Question 7Question 71 pts

 

Which of the following neuron structures receives impulses from other neurons?

Group of answer choices

dendrites

 

axonal hillock

 

axons

 

terminal buds

 

 

Flag question: Question 8Question 81 pts

 

When a neuron reaches threshold, _____ rushes into the cell via voltage-gated channels, resulting in an action potential.

Group of answer choices

calcium ions

 

potassium ions

 

sodium ions

 

chloride

 

 

Flag question: Question 9Question 91 pts

 

______ cause the post-synaptic neuron's cell membrane to become hyperpolarized, decreasing the likelihood of an action potential.

Group of answer choices

convergance

 

excitatory post synaptic potentials

 

divergance

 

inhibitory post synaptic potential

 

 

Flag question: Question 10Question 101 pts

 

_____ of an impulse amplifies the result of the impulse.

Group of answer choices

divergance

 

convergance

 

inhibitory neurotransmitters

 

the all-or-none response

 

 

Flag question: Question 11Question 111 pts

 

The ________ is the space between two adjacent neurons.

Group of answer choices

terminal knob

 

axonal hillock

 

Nissl body

 

synaptic cleft

 

 

Flag question: Question 12Question 121 pts

 

Oligodendrocytes produce myelin and are found only in neural tissue of the

Group of answer choices

brain and spinal cord

 

peripheral nerves

 

arms and legs

 

cranial nerves

 

 

Flag question: Question 13Question 131 pts

 

______ neurons have two processes--one axon and one dendrite.  They occur in specialized nervous tissue such as the eyes, nose, and ears.

Group of answer choices

multipolar

 

tripolar

 

bipolar

 

unipolar

 

 

Flag question: Question 14Question 141 pts

 

______ are neuroglial cells found in the CNS that link neurons to blood vessels and form scar tissue to close gaps due to injury in this tissue.

Group of answer choices

microglia

 

oligodendrocytes

 

astrocytes

 

ependyma

 

 

Flag question: Question 15Question 151 pts

 

What portion of the the motor division of the peripheral nervous systerm is under voluntary control?

Group of answer choices

parasympathetic

 

sympathetic

 

somatic

 

autonomic

 

 

Flag question: Question 1Question 11 pts

 

Which layer of the meninges is actually the layer that forms the inner periosteum of the cranium?

Group of answer choices

pia mater

 

dura mater

 

fasciculus mater

 

arachnoid mater

 

 

Flag question: Question 2Question 21 pts

 

Most cerebrospinal fluid (CSF) is produced

Group of answer choices

in the third ventricle

 

in the lateral ventricles

 

in the aquaduct

 

in the fourth venctricle

 

 

Flag question: Question 3Question 31 pts

 

The gray portion of the spinal cord is composed of

Group of answer choices

cerebrospinal fluid

 

meninges

 

myelenated neurons

 

unmyelated neurons

 

 

Flag question: Question 4Question 41 pts

 

The ______ tracts are ______ .  They are located in the lateral and anterior columns maintenance of muscle tone and activity of sweat glands

Group of answer choices

spinocerebellar;  ascending

 

spinocerebellar;  descending

 

reticulospinal; ascending

 

reticulospinal;  descending

 

 

Flag question: Question 5Question 51 pts

 

The cerebrum of the brain develops from the _____ portion of developing brain.

Group of answer choices

forebrain

 

pons

 

midbrain

 

hindbrain

 

 

Flag question: Question 6Question 61 pts

 

The corpus callosum is composed of deep nerve fibers that connect

Group of answer choices

the brainstem to the cerebellum

 

the cerebrum to the brainstem

 

the cerebrum to the cerebellum

 

the right and left hemispheres of the cerebrum

 

 

Flag question: Question 7Question 71 pts

 

A ______ is a shallow groove between convolutions on the surface of the brain, while ______ are deep grooves in the brain, such as the deep groove that separates the two hemispheres of the cerebrum.

Group of answer choices

insula;  lobe

 

sulcus;  fissure

 

lobe, insula

 

fissure;  sulcus

 

 

Flag question: Question 8Question 81 pts

 

The majority of the cerebrum is composed of white matter.  However, the outer portion of the cerebrum, called the _________, is composed of gray matter and contains 75% of the neurons of the entire nervous system.

Group of answer choices

arbor vitae

 

cerebral medulla

 

cerebellar cortex

 

cerebral cortex

 

 

Flag question: Question 9Question 91 pts

 

Which of the following is a correct statement?

Group of answer choices

In most people, neither hemisphere of the cerebrum is dominant over the other

 

the right hemisphere is dominant for some tasks, while the left hemisphere is dominant for other tasks

 

In most people, the right hemisphere is dominant

 

In most people, the left hemisphere of the brain is dominant

 

 

Flag question: Question 10Question 101 pts

 

Which of the following is NOT part of the brainstem?

Group of answer choices

medulla oblongata

 

midbrain

 

pons

 

hypothalamus

 

 

Flag question: Question 11Question 111 pts

 

The space immediately  between the _____ and _____ is called the subarachnoid space and contains cerebrospinal fluid.

Group of answer choices

dura mater and the bone of the cranium

 

dura mater and arachnoid mater

 

dura mater and bone of the vertebral column

 

pia mater and arachnoid mater

 

 

Flag question: Question 12Question 121 pts

 

The aquaduct connects

Group of answer choices

the third and fourth ventricles

 

the lateral ventricles

 

the fourth ventricle and epidural space

 

the lateral ventricles and the third ventricle

 

 

Flag question: Question 13Question 131 pts

 

The cervical enlargement of the spinal cord supplies nerves to the

Group of answer choices

lower limbs

 

trunk

 

upper limbs

 

brain

 

 

Flag question: Question 14Question 141 pts

 

The ______ is the center for intelligence and personality, as well as reasoning and solving complex problems.

Group of answer choices

medulla oblongata

 

cerebellum

 

pons

 

cerebrum

 

 

Flag question: Question 15Question 151 pts

 

The _______ links that nervous system and the endocrine system.  It helps maintain homeostasis by regulating visceral activities, including hunger and thirst.

Group of answer choices

basal nuclei

 

hypothalamus

 

limbic system

 

thalamus