Quiz 1 & 2 & 3

Which wave of the electroencephalogram is elevated during mental activity and sensory stimulation ?

Beta .

14. Which is used for speech sounds to produce language ?

Broca's area .

What does it mean that a cell membrane is polarized ?

C ) there are opposite charges on either side of the cell membrane

Which disease s due to deficiency of an enzyme which leads to accumulation of gangliosides in the myelin sheath ?

Tay Sachs disease .

Which cranial nerve below is only motor in function ?

XII . ( hypoglossal )

15. A neurotransmitter carries the message of an action potential the synapse toward the neuron .

across post synaptic

When an individual moves , the moves relative to the hair cells attached to the head .

Otolith

Your friend convinced you to try the " Spinning Tornado " carnival ride . Afterwards , you step off the nightmare and your head seems to continue spinning . What could be causing the experience ?

Overstimulation of the ampulla

Which ion may cause hyperpolarization ?

chloride

Color blindness is a condition that mostly affects

cones

Pathways of the sympathetic nervous system travel through

cranial nerves & sacral spinal nerves

release acetylcholine from their end bulbs .

release All preganglionic neurons

The branch of the nervous system responsible for directly innervating skeletal muscle is the

somatic motor nervous system

In physiology of hearing all of statements are true EXCEPT :

.Low frequency vibrations are close to the base of cochlea

Which of the following is a method by which neurotransmitters may be removed from a synapse ?

All of the responses above are correct .

All are characteristics of the autonomic nervous system , except :

Always excitatory

Which best describes the location of the receptors for hearing ?

Basilar membrane

11. Which area has major functions in learning , memory , personality , cognition , language and a conscience ?

Cerebrum

Which fibers would you most likely find in the corpus callosum ?

Commissural

Which of the following is true of myopia ?

Concave lenses help correct this condition .

Which area of the brain is involved in breathing , sleeping and arousal ?

Diencephalon

All are steps involved in the response of the eyes as an object moves closer , except

Dilation of the pupil .

Which best describes the circuit shown below

Diverging

Both neuromuscular and neuronal synapses may be excitatory and inhibitory in function .

False

Both the electrical and chemical gradient favors the movement of potassium ions into a cell .

False

D. Reticular The thalamus receives input from the cerebral cortex ,cerebellum, basal nuclei and limbic system.

False

Dilation of bronchioles will occur as norepinephrine binds Beta - 2 cholinergic receptors as an effect of the parasympathetic nervous

False

Ependymal cells produce cerebral spinal fluid in the PNS .

False

Ionotropic Receptors are longer lasting and more variable .

False

Lamellated ( Pacinian ) corpuscles are slowly adapting receptors for vibration .

False

Motor pathways have first order , second order and third order neurons .

False .

Spatial summation occurs when a neurotransmitter is released repeatedly from a single axon terminal resulting in rapid succession of ESPS .

False .

Which area of the brain has functions in memory and learning ?

Hippocampus

Which lobe of the brain functions in taste ?

Insula .

You discover a drug that blocks chemical - gated potassium channels . What effect does this drug have on neurons ?

It prevents hyperpolarizing graded potentials

Which is a correct about the sympathetic nervous system ?

It will increase hormone secretion from the adrenal medulla

Which is location of decussation for the fasciculus cuneatus and fasciculus gracilis tracts ?

Medulla oblongata

Sympathetic nervous system differs from the parasympathetic one because :

Preganglionic sympathetic axons are short

All are functions of cerebral spinal fluid EXCEPT

Provides hemoglobin .

A selective serotonin reuptake inhibitor prescribed for depression is :

Prozac

Myelin is produced by in the

Schwann cells / PNS

Which structure is used to detect angular acceleration ?

Semicircular canals

Folic acid ( Vitamin B9 ) 3 months prior to conception reduces risk of which of the following disorders ?

Spina Bifida

Astigmatism is

The unequal curvature of lens or cornea

Extremely hot or cold temperatures are sensed by the

Thermal nociceptors .

22. Which is location of decussation for the fasciculus cuneatus and fasciculus gracilis tracts Spinal cord . 23. The ascending ( sensory ) pathways of the spinothalamic tracts are for pain , temperature and non - discriminative touch .

True .

hypoglossal ) Which cranial nerve below functions in facial sensation , mastication and swallowing ?

V. Trigeminal

Nerves that carry impulses from the intestines to brain could be classed as➖➖➖➖➖➖➖➖➖

Visceral afferent

The term " nerve fibers " will refer to :

axons

All are examples of neurotransmitters EXCEPT

cyclic AMP

The term " nerve fibers " will refer to :

dendrites

During exposure to light

exposure rhodopsin containing retinal absorbs the light and is activated . photoreceptors hyperpolarize . ganglion cells fire action potentials .

The region where the lens focuses the image onto the retina is the :

fovea

You have the most photoreceptors at your and none at your

fovea centralis blindspot

Where would you expect to find a bipolar neuron ?

in olfactory epithelium

During an EPSP , the membrane potential of a neuron will :

move toward 0 mV

Axons that conduct action potentials faster have :

myelinated sheath

7. Please complete the sentence : The function of a ganglion in the PNS is most similar to the function of a in the CNS .

nuclei

Please complete the sentence : The function of a ganglion in the PNS is most similar to the function of a in the CNS .

nuclei

During repolarization phase of an action potential , which ion crosses the cell membrane and exits the cell ?

potassium

During exposure to light ,

rhodopsin containing retinal absorbs the light and is activated .

Nissl bodies are another term of the

rough ER

Nissl bodies are another term of the :

rough ER

Which one would be altered when riding in an elevator ?

saccule

4. During the depolarization phase of an action potential , which ion crosses the cell membrane and enters the cell ?

sodium

During the depolarization phase of an action potential , which ion crosses the cell membrane and enters the cell ?

sodium

What does it mean that a cell membrane is polarized ?

there are opposite charges on either side of the cell membrane

If the strength of a stimulus is above the threshold level :

there will be a complete action potential

A neuron that has a long refractory period :

will take longer to respond to a second stimulus