BIO 201 Exam

Total Flash Cards » 61
 
1. 

The _____ nervous system is composed ofthe brain and spinal cord.

 

central

 
2. 

The ______ nervous system controls the skeletal muscles.

 

somatic

 
3. 

The part of the peripheral nervous system that carries sensory information to the CNS is designated

 

afferent

 
4. 

_____ line the brain ventricles and spinal canal

 

Ependymal cells

 
5. 

Ion channels that are always open are called ___channels.

 

leak

 
6. 

Neurotransmitter for release is stored in synaptic ______.

 

vesicles

 
7. 

The all-or-none principle states that

 

all stimuli great enough to bring the membrane to threshold will produce identical action potentials.

 
8. 

Which type of synapse is most common in the nervous system?

 

chemical

 
9. 

The ion that triggers the release ofacetylcholine into the synaptic cleft of aneuromUSClilar junction is

 

calcium

 
10. 

The site in the neuron where EPSPs and IPSPs are integrated is the

 

axon hillock

 
11. 

Summation that results from the cumulative effect of multiple synapses and multiple places on the neuron is designated

 

spacial summation

 
12. 

When a second EPSP arrives at a singlesynapse before the effects of the first havedisappeared, what occurs?

 

temporal summation

 
13. 

IPSPs(inhibitory post synaptic potentials)

 

are hyperpolarizations

 
14. 

The efferent division of the peripheral nervous system innervates:

 

Smooth, skeletal, heart muscle cells & glandular cells
-all the above

 
15. 

______channels open ordose in response to physical distortion of the membrane surface.

 

Mechanically gated

 
16. 

EPSPs (excitatory postsynaptic potentials) occur when

 

extra sodium ions enter a cell

 
17. 

Puffer fish poison blocks voltage-gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?

 

The axon would be unable to generate action potentials.

 
18. 

Which area of the graph occurs when there is asudden inrush of of sodium ions?

 

2

 
19. 

What structure is covered by many blood vessels and adheres tightly to the surface of the brain?

 

pia mater

 
20. 

The visual cortex is located in the

 

occipital lobe

 
21. 

The cranial nerve that controls a vast majority of the neural activity is the

 

vagus

 
22. 

The auditory cortexis located in the

 

temporal lobe

 
23. 

Absorption at the arachnoid granulations returns CSF to the

 

venous circulation

 
24. 

What contains a spiderweblike network of cells and fibers through which cerebrospinal fluid flows?

 

subarachnoid space

 
25. 

The brain requires a substantial blood supply. The vessels that deliverblood to the brain are the

 

internal carotid & vertebral arteries

 
26. 

The ____ division of the autonomic nervous system is said to function during "rest and digest."

 

parasympathetic

 
27. 

The statement "it controls the diameter of the pupil" is

 

true for the parasympathetic and sympathetic nervous systems

 
28. 

The cerebellum can be permanently damaged by stroke or temporarily affected by drugs or alcohol The resulting disturbance in motor control is known as

 

ataxia

 
29. 

The auditory ossides connect the

 

tympanic membrane to the oval window

 
30. 

You suspect your friend has damage to cranialnerve 1 when he is unable to

 

smell his food

 
31. 

An area of the retina that contains only conesand is the site of sharpest vision is the

 

fovea

 
32. 

There are three different types of cones, each one sensitive to different light energies. These cones are designated

 

red, green, blue

 
33. 

The human lens focuses light on the photoreceptor cells by

 

changing shape

 
34. 

The transparent portion of the fibrous tunic isthe

 

cornea

 
35. 

Alter suffering a stroke, Mary finds that she cannot move her right arm. This would suggest that the stroke damage is in the area of the ______ lobe.

 

left frontal

 
36. 

There are ___pairs of cranial nerves.

 

12

 
37. 

A(n) is a printed record of the brain's electrical activity over a period of time.

 

electroencephalogram

 
38. 

______is a disorder affecting the ability to speak or read.

 

Aphasia

 
39. 

The _____ covers most of the exposed surface of the eye.

 

conjunctiva

 
40. 

Autonomic efferents

 

conduct impulses to smooth muscles and glands

 
41. 

A state of unconsciousness in which an individual cannot be aroused even by strong stimuli is

 

coma

 
42. 

A state of unconsciousness in which an individual can be aroused by normal stimuli is

 

sleep

 
43. 

A ray of light entering the eye will encounter these structures in which order ?

 

cornea > aqueous humor > conjunctiva > lens > vitreous body > retina > choroid

 
44. 

Perception of gravity and linear acceleration depends on

 

the force exerted by otoliths on hair cells of the maculae

 
45. 

Movement of the endolymph in the semicircular canals

 

signals rotational movements

 
46. 

Gravity and linear acceleration are sensed in the

 

macculae of the saccule and utricle

 
47. 

Receptors for hearing are located in the

 

cochlea

 
48. 

What structure regulates the amount of light passing to the visual receptors of the eye ?

 

iris

 
49. 

The gelatinous material that give the eyeball its basic shape is the

 

vitreous humor

 
50. 

Which of the follow descriptions applies to the term myopia?

 

corrected with diverging lensnearsightednessimage focused in front of retina

 
51. 

All of the following are true about the lacrimal glands, except that they

 

A) produce most of the volume of tearsB) are located in the recesses in the frontal bonesC) produce a hypertonic fluidD) produce lysosomesE) produce watery, slightly alkaline secretions

 
52. 

What is the main functions of the rods in the eye?

 

vision to light

 
53. 

Motion sickness seems to

 

result from mismatch between visual and vestibular inputs

 
54. 

Which of the following could not be seen as one that looks into the eye with an ophthalmoscope?

 

optic chiasm

 
55. 

The blind spot of the eye is

 

where the optic nerve leaves the eye

 
56. 

Preparing the body for "fight or flight" response in the role of the

 

sympathetic

 
57. 

Which of these effectors is not directly controlled by the autonomic nervous system?

 

skeletal muscle

 
58. 

REM sleep is associated with

 

temporary skeletal muscle inhibition except for the extrinsic eye muscles

 
59. 

Gravity and linear acceleration are sensed in the

 

saccule & utricle

 
60. 

The frequency of a perceived sound depends on

 

which part of the cochlear duct is simulated

 
61. 

Which of these anatomical situations is correct?

 

tympanum > malleus > incus > stapes > oval window > round window