6a/P Anatomy Pysiology Test
(32).webp "6a/P Anatomy Pysiology Test - Quiz")
test 6 anatomy physiology oooooooooo
- 1.
Olfactory glands
- A.
Contain neural receptors for the sense of smell
- B.
Form the basement membrane of the olfactory epitelium
- C.
Are sensitive to aromatic molecules in the air
- D.
Produce a pigmented mucus covers olfactory epithelium
- E.
Form olfactory bulb
Correct Answer
D. Produce a pigmented mucus covers olfactory epitheliumExplanation
The olfactory glands produce a pigmented mucus that covers the olfactory epithelium. This mucus helps to trap and dissolve aromatic molecules in the air, allowing them to come into contact with the neural receptors for the sense of smell. This pigmented mucus also helps to protect the olfactory epithelium from damage and maintain its function.Rate this question:
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- 2.
All of the following are true of olfactory pathways except
- A.
Decussate at the level of mamillary bodies
- B.
Are subjected to central modification by several areas of brain
- C.
Carry impulse fot the olfactory cortex
- D.
Are the only sensory pathways to reach teh cerebral cortex without first synapsing in the thalamus
- E.
Exibit a considerable amount of convergence
Correct Answer
A. Decussate at the level of mamillary bodiesExplanation
Olfactory pathways do not decussate at the level of mamillary bodies. Decussation refers to the crossing over of nerve fibers from one side of the body to the other. In the case of olfactory pathways, the fibers do not cross over at the level of the mamillary bodies. Instead, they remain on the same side of the brain. The other statements are true - olfactory pathways are subjected to central modification by several areas of the brain, carry impulses to the olfactory cortex, are the only sensory pathways to reach the cerebral cortex without first synapsing in the thalamus, and exhibit a considerable amount of convergence.Rate this question:
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- 3.
All are true of teh vascular tunic of the eye except
- A.
Provides route for blood vessels n lyphatic that supply tissue
- B.
Regulates amount of light entering the eye
- C.
Secretes and reabsorbs the aqueous humor
- D.
Contains pain receptors
- E.
Controls the shape of the lens
Correct Answer
D. Contains pain receptorsExplanation
The vascular tunic of the eye, also known as the uvea, is responsible for providing a route for blood vessels and lymphatics that supply the eye tissues, regulating the amount of light entering the eye, secreting and reabsorbing the aqueous humor, and controlling the shape of the lens. However, it does not contain pain receptors.Rate this question:
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- 4.
Vitreous Body
- A.
Contains the lens
- B.
Helps to stabilize eye and give physical support retina
- C.
Contains blood vessels nourish retina
- D.
Located between the lesn n iris
- E.
Replaced at eh rate of 20% year
Correct Answer
B. Helps to stabilize eye and give physical support retinaExplanation
The vitreous body helps to stabilize the eye and provide physical support to the retina. It fills the space between the lens and the iris, and its gel-like consistency helps to maintain the shape of the eye. Additionally, it contains blood vessels that nourish the retina, ensuring its proper functioning. The vitreous body is not replaced at a rate of 20% per year.Rate this question:
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- 5.
The shape of the lens is controlled by the
- A.
Pupillary constrictor muscles
- B.
Papillary dilator muscle
- C.
Ciliary muscle
- D.
Iris
- E.
Aqueous body
Correct Answer
C. Ciliary muscleExplanation
The ciliary muscle controls the shape of the lens. When the ciliary muscle contracts, it causes the lens to become thicker and more curved, allowing the eye to focus on near objects. Conversely, when the ciliary muscle relaxes, the lens becomes thinner and flatter, enabling the eye to focus on distant objects. This adjustment in lens shape is crucial for the eye's ability to accommodate and maintain clear vision at different distances.Rate this question:
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- 6.
When all three cones population are stimulated we see
- A.
Red
- B.
Blue
- C.
Green
- D.
White
- E.
Black
Correct Answer
D. WhiteExplanation
When all three cones populations are stimulated, we see a combination of colors, which includes red, blue, green, white, and black. However, the color that stands out the most and is most visible in this combination is white. It is likely that the stimulation of all three cones simultaneously creates a perception of white color.Rate this question:
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- 7.
The vibrations received by the ear are amplified by the action of the
- A.
Auditory ossicles
- B.
Cochlea
- C.
Oval window
- D.
Round window
- E.
Typanic membrane
Correct Answer
A. Auditory ossiclesExplanation
The auditory ossicles are a set of three small bones in the middle ear (malleus, incus, and stapes) that amplify sound vibrations received by the ear. These bones transmit the vibrations from the eardrum to the cochlea, which is responsible for converting the vibrations into electrical signals that can be interpreted by the brain as sound. The vibrations are amplified by the mechanical action of the auditory ossicles, allowing us to perceive sounds at different volumes.Rate this question:
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- 8.
The following steps occur in rods when they excited by photons of light
- A.
1 6 5 2 4 3
- B.
3 6 5 2 1 4
- C.
6 3 5 2 1 4
- D.
3 6 5 1 2 4
- E.
1 3 4 5 6 2
Correct Answer
B. 3 6 5 2 1 4 -
- 9.
Which of the following statement concerning vision is false?
- A.
Approximately half fo the fibers in each optic nerve corss opposit sides of the brain
- B.
Fibers of teh optic nerve synaps at teh lateral geniculates
- C.
Image that is formed on the retina is inverted
- D.
Depth of perception is improved when one eye is closed
- E.
Visual cortex of the brain contain sensory map
Correct Answer
D. Depth of perception is improved when one eye is closedExplanation
Closing one eye does not improve depth perception. Depth perception is the ability to perceive the distance and three-dimensional aspects of objects. It is primarily achieved through binocular vision, which requires both eyes working together to provide depth cues such as parallax and stereopsis. Closing one eye eliminates the binocular cues and reduces the ability to accurately perceive depth.Rate this question:
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- 10.
The frequency of sound is indicated to the nervous systerm by the
- A.
Frequency of sterocilia vibration
- B.
Number of row of hairs cells
- C.
Regioon of inner ear that is stimulated
- D.
Movement of perilymph choclear duct
- E.
Frequency of vibration of tectorial membrane
Correct Answer
C. Regioon of inner ear that is stimulatedExplanation
The correct answer is "region of inner ear that is stimulated". The frequency of sound is indicated to the nervous system by the specific region of the inner ear that is stimulated. Different regions of the inner ear are responsible for detecting different frequencies of sound. When sound waves enter the ear, they cause vibrations in specific areas of the cochlea, which is the hearing organ in the inner ear. These vibrations stimulate hair cells in the cochlea, which then send signals to the brain indicating the frequency of the sound.Rate this question:
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- 11.
The follwoing is a list of stept occur production of auditory sensation
- A.
2 4 1 6 5 3
- B.
2 4 6 3 5 1
- C.
2 1 4 5 5 3
- D.
2 4 6 1 5 3
- E.
2 5 4 6 1 3
Correct Answer
D. 2 4 6 1 5 3 -
- 12.
A sound with frequency of 18000 hz would
- A.
Be very loud
- B.
Be very soft
- C.
Be high pitched
- D.
Be low pitched
- E.
B n D
Correct Answer
C. Be high pitchedExplanation
A sound with a frequency of 18000 Hz would be high pitched. Pitch refers to how high or low a sound is perceived to be, and it is directly related to the frequency of the sound wave. Higher frequencies are perceived as higher pitches, while lower frequencies are perceived as lower pitches. Since 18000 Hz is a relatively high frequency, the sound would be perceived as high pitched.Rate this question:
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- 13.
Damage to the cupula of the lateral semicirular canal would interfer with our perception
- A.
Gravitational pull
- B.
Linear acceleration
- C.
Horizontal rotation of head
- D.
Vertical rotation
- E.
Angular rotation
Correct Answer
C. Horizontal rotation of headExplanation
Damage to the cupula of the lateral semicircular canal would interfere with our perception of horizontal rotation of the head. The cupula is a gelatinous structure located in the semicircular canals of the inner ear, and it is responsible for detecting rotational movements of the head. When the head rotates horizontally, the fluid in the semicircular canals moves, causing the cupula to bend and stimulate the hair cells, which then send signals to the brain to perceive the rotation. If the cupula is damaged, it may not be able to accurately detect horizontal head rotation, leading to a disruption in our perception of this type of movement.Rate this question:
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- 14.
Whey do objects veiwed under water while scuba diving appear closer n larger
- A.
Water magnifies image - denser than lens
- B.
Light moves more sltowly through the water
- C.
Dive mask refracts lifht before it reaches the cornea and the extra refraction causes image to appear closer and larger
- D.
The cornea does not function in water n the light is not regracted as much
- E.
Light waves are scattered by the water before reaching the eye
Correct Answer
C. Dive mask refracts lifht before it reaches the cornea and the extra refraction causes image to appear closer and largerExplanation
The correct answer is that the dive mask refracts light before it reaches the cornea, causing the image to appear closer and larger. When light passes from one medium to another, such as from air to water, it undergoes refraction. The denser medium of water causes the light to change direction, and the dive mask further bends the light before it reaches the cornea. This additional refraction causes the image to appear closer and larger than it actually is.Rate this question:
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- 15.
If the sodium pimp in the membrane of teh photo receptors were blocked
- A.
Constantly see colors
- B.
Visual acuity
- C.
Blindenss would result
- D.
Able to see dim light
- E.
Cells would not be able to produce nuerotransmitters
Correct Answer
C. Blindenss would resultExplanation
If the sodium pump in the membrane of the photo receptors were blocked, blindness would result. The sodium pump plays a crucial role in maintaining the proper balance of sodium ions inside and outside the cell. This balance is necessary for the generation and transmission of electrical signals in the visual system. If the sodium pump is blocked, the cells would not be able to function properly, leading to a loss of vision and resulting in blindness.Rate this question:
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- 16.
Taste cells produce all the following sensation except
- A.
Spicy
- B.
Salty
- C.
Bitter
- D.
Sweet
- E.
Sour
Correct Answer
A. SpicyExplanation
Taste cells are responsible for detecting different tastes on the tongue. They can detect salty, bitter, sweet, and sour sensations. However, they do not produce the sensation of spiciness. Spiciness is detected by pain receptors, not taste cells.Rate this question:
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- 17.
The loudness of sound is correlated with ______ of soundwave
- A.
Pitch
- B.
Frequency
- C.
Amplitude
- D.
Wavelength
- E.
Speed
Correct Answer
C. AmplitudeExplanation
The loudness of sound is correlated with the amplitude of the sound wave. Amplitude refers to the maximum displacement of particles in a medium from their equilibrium position when a wave passes through it. A larger amplitude corresponds to a greater displacement, resulting in a louder sound. Therefore, as the amplitude of a sound wave increases, the loudness of the sound also increases.Rate this question:
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- 18.
The sensory cell of hearing are stimulated by ____ resting on their sterocilia
- A.
Basilar mem
- B.
Vestibular
- C.
Typanic
- D.
Tectorial
- E.
Crista
Correct Answer
D. TectorialExplanation
The sensory cells of hearing are stimulated by the tectorial membrane resting on their stereocilia. The tectorial membrane is a gel-like structure located above the hair cells in the cochlea. When sound waves travel through the cochlea, they cause the stereocilia to bend, which in turn stimulates the sensory cells and allows for the perception of sound. The tectorial membrane plays a crucial role in this process by providing a surface for the stereocilia to rest on and facilitating the transmission of sound signals.Rate this question:
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- 19.
At normal daylight intesity, the _____ cells are nonfuctional bec all their rhodopsin is bleached
- A.
Cone
- B.
Rod
- C.
Amacrine
- D.
Bipolar
- E.
Corneal
Correct Answer
B. RodExplanation
Rod cells are responsible for low-light vision and are more sensitive to light than cone cells. In normal daylight intensity, the rod cells become nonfunctional because their rhodopsin, a light-sensitive pigment, is bleached. This means that the rhodopsin molecules have absorbed so much light that they cannot respond to further light signals. Therefore, rod cells are unable to function effectively in bright light conditions.Rate this question:
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- 20.
When you view objects closer to the eye, the eye makes and adjustment called
- A.
Emmetropia
- B.
Accomodation
- C.
Refraction
- D.
Myopia
- E.
Diplopia
Correct Answer
B. AccomodationExplanation
When viewing objects closer to the eye, the eye undergoes a process called accommodation. This is the adjustment made by the eye to focus on near objects by changing the shape of the lens. The lens becomes thicker to increase its refractive power and bring the image into focus on the retina. This process allows for clear vision at different distances and is essential for tasks such as reading or using electronic devices at close range.Rate this question:
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- 21.
When a tip link opens the ion channels on the cholear sterocilium _____ ions rapidly enter and depolarize the hair cells
- A.
Sodium
- B.
Potassium
- C.
Chloride
- D.
Calcium
- E.
Magnesium
Correct Answer
B. PotassiumExplanation
When a tip link opens the ion channels on the cholear sterocilium, potassium ions rapidly enter and depolarize the hair cells. Potassium ions are positively charged and their entry into the hair cells helps to depolarize the cells, which is necessary for generating electrical signals that are transmitted to the brain for auditory processing.Rate this question:
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- 22.
When light is absorbed by rod cells
- A.
Clylic gmp is produced
- B.
Rod cells release a sudden flood of glutamic acid
- C.
All bipolar cells become hyperpolarized
- D.
Retinal and opsin dissociate from each other
- E.
Sodium ions diffuse
Correct Answer
D. Retinal and opsin dissociate from each otherExplanation
When light is absorbed by rod cells, retinal and opsin dissociate from each other. This is because the absorption of light causes a conformational change in the retinal molecule, leading to its separation from the opsin protein. This dissociation triggers a series of events that ultimately result in the generation of electrical signals in the rod cells, which are then transmitted to the brain for visual processing.Rate this question:
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- 23.
What is the main function of the rods in teh eye
- A.
Depth perception
- B.
Color vision
- C.
Vision in dim light
- D.
Accomodation near vision
Correct Answer
C. Vision in dim lightExplanation
The main function of the rods in the eye is to enable vision in dim light. Rods are photoreceptor cells in the retina that are highly sensitive to light. They allow us to see in low levels of illumination, such as at night or in dark environments. Rods do not contribute to color vision or accommodation for near vision, and they have limited role in depth perception.Rate this question:
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- 24.
Receptor for hearing are located in the
- A.
Choclea
- B.
Semicircular canals
- C.
Typmanic memb
- D.
Vestibule
Correct Answer
A. ChocleaExplanation
The correct answer is the cochlea. The cochlea is a spiral-shaped structure in the inner ear that contains the sensory receptors responsible for hearing. It is filled with fluid and lined with tiny hair cells that convert sound vibrations into electrical signals that can be interpreted by the brain. The semicircular canals are responsible for detecting head movements and maintaining balance, while the tympanic membrane (eardrum) and vestibule are not directly involved in hearing.Rate this question:
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- 25.
The oil componen found in tears is produced by
- A.
Lacrimal gland
- B.
Ciliary gland
- C.
Conjunctiva
- D.
Tarsal gland
Correct Answer
D. Tarsal glandExplanation
The tarsal gland is responsible for producing the oil component found in tears. These glands are located in the eyelids and secrete an oily substance that helps to lubricate the eyes and prevent tears from evaporating too quickly. This oil component, along with the watery and mucous components produced by other glands in the eye, helps to keep the eyes moist and protect them from dryness and irritation.Rate this question:
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- 26.
Nerve bigers form medial aspect of each eye _______
- A.
Go tot he superior colliculus
- B.
Pass poseteriorly without corssing over at the chiasma
- C.
Divide at teh ciasma, with some crossing and some not crossing
- D.
Cross over the opposite side of chiasma
Correct Answer
D. Cross over the opposite side of chiasmaExplanation
The correct answer is that the nerve fibers cross over to the opposite side of the chiasma. This means that the nerve fibers from the medial aspect of each eye cross over to the opposite side of the brain at the optic chiasm. This crossing allows for information from the left visual field to be processed in the right hemisphere of the brain and vice versa.Rate this question:
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- 27.
Ordinarily, it is not possible to transplant tissues form one person to another yet cornea can be transplanted without tissue rejection, this is because the cornea ____
- A.
Is not living tissue
- B.
No nerve supply
- C.
No blood supply
- D.
No connective tissue
Correct Answer
C. No blood supplyExplanation
The cornea can be transplanted without tissue rejection because it does not have a blood supply. The lack of blood vessels in the cornea reduces the risk of immune system response and rejection by the recipient's body.Rate this question:
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- 28.
The first way station in visual pathway from teh eye after there has been partial crossover in optic chiasma is
- A.
Superior colliculus
- B.
Lateral geniculate body of thalamus
- C.
Visual cortex
- D.
Temporal lobe
Correct Answer
B. Lateral geniculate body of thalamusExplanation
After the optic chiasma, where there is partial crossover of the optic nerves, the first way station in the visual pathway from the eye is the lateral geniculate body of thalamus. This structure receives information from the optic nerves and relays it to the visual cortex in the occipital lobe of the brain for further processing and interpretation. The superior colliculus is involved in the control of eye movements and visual reflexes, while the temporal lobe is responsible for processing auditory information and certain aspects of visual perception. Therefore, the lateral geniculate body of thalamus is the most appropriate answer in this context.Rate this question:
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- 29.
Which of the followoing is true about gustatory receptors?
- A.
In order for a chemical to be sensed it must hydrophobic
- B.
The receptors gen a/p in response to stimuli
- C.
Compete adaptation occurs in about one to five minutes
- D.
All gustatory receptors have the same threshold for activation
Correct Answer
C. Compete adaptation occurs in about one to five minutesExplanation
Gustatory receptors are responsible for the sense of taste. Compete adaptation refers to the phenomenon where the sensitivity of these receptors decreases over time when exposed to a continuous stimulus. This means that after being exposed to a taste for about one to five minutes, the receptors become less responsive to that particular taste. This adaptation allows the taste buds to remain sensitive to new tastes and prevents them from being overwhelmed by a continuous stimulus.Rate this question:
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- 30.
Olfactory cells and taste buds stimulated by
- A.
Substance in solution
- B.
Stretching in receptor cells
- C.
The movement of otoliths
Correct Answer
A. Substance in solutionExplanation
Olfactory cells and taste buds are stimulated by the presence of a substance in a solution. This means that when a substance dissolves in a liquid, such as when we taste food or smell a fragrance, it triggers a response in our olfactory cells and taste buds. These sensory cells are designed to detect and respond to specific chemicals, allowing us to perceive different tastes and smells. The presence of a substance in a solution is therefore the correct answer as it accurately describes the process of stimulation for olfactory cells and taste buds.Rate this question:
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- 31.
The cells fo the retina in shich action potentioal are generated are
- A.
Rods n cones
- B.
Bipolar cells
- C.
Ganglion cells
- D.
Amarcine cells
Correct Answer
C. Ganglion cellsExplanation
The correct answer is ganglion cells. Ganglion cells are responsible for generating action potentials in the retina. These cells receive input from bipolar cells, which in turn receive input from rods and cones. The ganglion cells then transmit the visual information through their axons, which form the optic nerve, to the brain for further processing. Therefore, ganglion cells play a crucial role in transmitting visual signals from the retina to the brain.Rate this question:
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- 32.
Which of the following is true light and vision
- A.
Human photoreceptors respond to light in 100 - 300 nm
- B.
When we see color of an object all light being aborbed by that object except for the color being experienced
- C.
Light is a form of electormagnetic radiation
- D.
The greater the inciden angle of light striking a refractive surface the less bending
Correct Answer
B. When we see color of an object all light being aborbed by that object except for the color being experiencedExplanation
When we see the color of an object, all light is being absorbed by that object except for the color being experienced. This is because objects appear to have a certain color because they selectively reflect certain wavelengths of light while absorbing others. The color that we perceive is the result of the wavelengths of light that are reflected and reach our eyes.Rate this question:
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- 33.
Which statement about malnutriion night blindness is most accurate
- A.
Vitamin D difficient
- B.
Vitamin supplements can reverse degeneratiive changes
- C.
Visual pigment content is reduced in both rod n cones
- D.
The impared vision is cause by reduced cone function
Correct Answer
B. Vitamin supplements can reverse degeneratiive changesExplanation
Vitamin supplements can reverse degenerative changes in malnutrition night blindness. This suggests that the condition is caused by a deficiency in certain vitamins, and by taking supplements, the degenerative changes can be reversed, leading to improved vision. It implies that the impaired vision in malnutrition night blindness is a result of the degenerative changes caused by vitamin deficiency, and not due to reduced cone function or reduced visual pigment content in both rod and cones.Rate this question:
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- 34.
Selct the correct sttement about equilibrium
- A.
Weight of teh endolymph containd within the semi circular canals against the maculae is responsible for static equ
- B.
Crhistae respond to angular acceleration and deceleration
- C.
Hair cells of bothe types of equil hyperpolorize
Correct Answer
B. Crhistae respond to angular acceleration and decelerationExplanation
The statement "Crhistae respond to angular acceleration and deceleration" is the correct statement about equilibrium. Cristae are sensory receptors located in the ampullae of the semicircular canals in the inner ear. They are responsible for detecting rotational movements of the head, specifically angular acceleration and deceleration. When the head moves, the fluid inside the semicircular canals moves, which in turn stimulates the hair cells in the cristae. This stimulation sends signals to the brain, allowing us to maintain balance and perceive changes in angular motion.Rate this question:
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- 35.
Light passes through the following
- A.
Vitreus humor lens aqueous cornea
- B.
Cornea aqueous humor lens vitrious humor
- C.
Cornea vitrious humor lens aqueous
Correct Answer
B. Cornea aqueous humor lens vitrious humorExplanation
Light passes through the cornea, which is the transparent outer layer of the eye. It then enters the aqueous humor, which is a clear fluid that fills the space between the cornea and the lens. The light continues to pass through the lens, which is a transparent structure that helps to focus the light onto the retina. Finally, the light reaches the vitreous humor, which is a gel-like substance that fills the back part of the eye, helping to maintain its shape.Rate this question:
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