Color Vision Quiz
45 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What phenomenon occurs when staring at an image and then looking at a white surface?

  • Color perception
  • Visual acuity
  • Color blindness
  • Afterimage (correct)

Which cells are primarily responsible for color vision in bright light?

  • Rod cells
  • Red cone cells
  • Blue cone cells
  • Cone cells (correct)

What happens to the red cone cells when a person stares at a red image for an extended period?

  • They increase sensitivity to light
  • They become stimulated
  • They become fatigued (correct)
  • They enhance brightness perception

What type of vision do rod cells provide?

<p>Black and white vision in dim light (B)</p> Signup and view all the answers

Which cone cells are activated when viewing a white surface after staring at a red image?

<p>Green and blue cone cells (D)</p> Signup and view all the answers

What happens to the pupil in dim light?

<p>The pupil dilates to allow more light in. (A)</p> Signup and view all the answers

Which muscles of the iris contract to dilate the pupil?

<p>Radial muscles of the iris. (A)</p> Signup and view all the answers

Why is it important to control the amount of light entering the eye?

<p>To prevent damage to photoreceptors. (A)</p> Signup and view all the answers

What occurs when the circular muscles of the iris relax?

<p>The pupil increases in size. (D)</p> Signup and view all the answers

What is the function of the iris in relation to the pupil?

<p>To change the size of the pupil. (C)</p> Signup and view all the answers

In bright light, what happens to the radial muscles of the iris?

<p>They relax to reduce light entry. (C)</p> Signup and view all the answers

How do the circular and radial muscles work together?

<p>They cooperate to adjust pupil size. (B)</p> Signup and view all the answers

What might happen if there is too much light entering the eye?

<p>It can result in damage to photoreceptors. (C)</p> Signup and view all the answers

What is the primary function of eye accommodation?

<p>Changing the shape of the lens to focus on objects at different distances (D)</p> Signup and view all the answers

What happens to the ciliary muscles when focusing on a near object?

<p>The circular ciliary muscles contract (B)</p> Signup and view all the answers

What change occurs in the lens when focusing on a distant object?

<p>The lens becomes thinner and less convex (B)</p> Signup and view all the answers

Which combination correctly shows the conditions of the lens and suspensory ligaments when focusing on a near object?

<p>Lens becomes thicker; suspensory ligaments slacken (D)</p> Signup and view all the answers

What effect does the contraction of circular ciliary muscles have on the lens?

<p>It causes the lens to become thicker (B)</p> Signup and view all the answers

Which statement is true regarding short sight?

<p>A person with short sight sees near objects more clearly than distant ones (B)</p> Signup and view all the answers

What happens to the tension in the suspensory ligaments when focusing on a near object?

<p>The tension decreases (B)</p> Signup and view all the answers

When focusing on distant objects, what happens to the light refraction by the lens?

<p>Light is refracted less (A)</p> Signup and view all the answers

What happens to light rays from near objects before entering the eyes?

<p>They are converged. (C)</p> Signup and view all the answers

Where do light rays from a near object focus if not corrected?

<p>Behind the retina. (D)</p> Signup and view all the answers

What type of lens is used to correct long sight?

<p>Convex lens. (A)</p> Signup and view all the answers

What should light rays from a distant object look like in a ray diagram?

<p>Parallel rays. (D)</p> Signup and view all the answers

How should the direction of light rays be indicated in a ray diagram?

<p>With arrowheads. (D)</p> Signup and view all the answers

What type of light rays should be drawn for near objects in a ray diagram?

<p>Diverging rays. (A)</p> Signup and view all the answers

What happens to light rays when they enter the cornea and lens?

<p>They are refracted. (C)</p> Signup and view all the answers

What is the result of light rays not focusing correctly on the retina?

<p>Blurred vision. (D)</p> Signup and view all the answers

What is the primary function of the cochlea?

<p>To convert sound waves into nerve impulses (C)</p> Signup and view all the answers

Which canal in the inner ear senses head tilting towards the right or left shoulder?

<p>Posterior canal (A)</p> Signup and view all the answers

What converts sound waves to mechanical vibrations?

<p>The eardrum (A)</p> Signup and view all the answers

Which component of the ear amplifies vibrations before they reach the oval window?

<p>Ear bones (A)</p> Signup and view all the answers

What is the role of sensory hair cells in the cochlea?

<p>To bend in response to endolymph movement (C)</p> Signup and view all the answers

Which part of the inner ear is primarily associated with balance?

<p>Semicircular canals (B)</p> Signup and view all the answers

What signals the brain regarding the position of the head?

<p>Endolymph movement (B)</p> Signup and view all the answers

What is the function of the pinna in the outer ear?

<p>To collect and direct sound waves (C)</p> Signup and view all the answers

What is a common aid for individuals with red-green colour blindness?

<p>Special filter glasses (A)</p> Signup and view all the answers

What causes astigmatism in the eye?

<p>Irregular shape of the cornea or lens (A)</p> Signup and view all the answers

Which treatment is commonly used for cataracts?

<p>Surgical replacement of the lens (D)</p> Signup and view all the answers

What is a symptom of glaucoma?

<p>Loss of peripheral vision (D)</p> Signup and view all the answers

What is macular degeneration primarily known for affecting?

<p>The center of the visual field (A)</p> Signup and view all the answers

How can mobile phone applications assist those with color blindness?

<p>By identifying colors using a camera (C)</p> Signup and view all the answers

Which condition can result in blurred vision due to an error in refraction?

<p>Astigmatism (A)</p> Signup and view all the answers

What is the primary cause of cataracts?

<p>Aging and environmental factors (D)</p> Signup and view all the answers

Flashcards

Afterimage

The effect of seeing a color after staring at its complementary color for a while.

Rod cells

Photoreceptor cells in the retina that respond to light and help us see in dim light conditions.

Cone cells

Photoreceptor cells in the retina that respond to light and help us see color in bright light.

Retina

The layer at the back of the eye that contains photoreceptor cells, such as rod cells and cone cells.

Signup and view all the flashcards

Stimulus

A stimulus that causes a response in an organism.

Signup and view all the flashcards

What is the Pupil?

The opening in the center of the iris that controls the amount of light entering the eye.

Signup and view all the flashcards

What is the Iris?

The colored part of the eye that surrounds the pupil.

Signup and view all the flashcards

What are circular muscles of the iris?

Circular muscles in the iris that contract to make the pupil smaller.

Signup and view all the flashcards

What are radial muscles of the iris?

Radial muscles in the iris that contract to make the pupil larger.

Signup and view all the flashcards

What is Pupil Constriction?

The process of making the pupil smaller, reducing the amount of light entering the eye.

Signup and view all the flashcards

What is Pupil Dilation?

The process of making the pupil larger, increasing the amount of light entering the eye.

Signup and view all the flashcards

What are Rods?

Light sensitive cells in the retina responsible for seeing in dim light.

Signup and view all the flashcards

What are Cones?

Light sensitive cells in the retina responsible for seeing color and detail.

Signup and view all the flashcards

Eye Accommodation

The process of adjusting the lens of the eye to focus on objects at different distances.

Signup and view all the flashcards

Ciliary Muscles

Circular muscles in the eye that contract when focusing on near objects, making the lens thicker.

Signup and view all the flashcards

Suspensory Ligaments

Fibrous strands that hold the lens in place and they become relaxed when focusing on a nearby object.

Signup and view all the flashcards

Lens Curvature

The thickness of the lens is altered to focus on near or far objects. This change in shape is called its curvature.

Signup and view all the flashcards

Focusing on a distant object

When focusing on a distant object, the ciliary muscles relax, the suspensory ligaments tighten, and the lens becomes thinner.

Signup and view all the flashcards

Focusing on a nearby object

When focusing on a nearby object, the ciliary muscles contract, the suspensory ligaments slacken, and the lens becomes thicker.

Signup and view all the flashcards

Short Sight

A condition where a person can see nearby objects clearly but has difficulty focusing on distant objects.

Signup and view all the flashcards

Long Sight

A condition where a person can see distant objects clearly but has difficulty focusing on nearby objects.

Signup and view all the flashcards

Focusing on distant objects

Light from distant objects enters the eye as parallel rays and is focused directly on the retina, creating a clear image.

Signup and view all the flashcards

Focusing on near objects

Light from near objects enters the eye as diverging rays, causing the image to focus behind the retina, resulting in blurry vision.

Signup and view all the flashcards

Correction of long sight

A convex lens is used to converge light rays from near objects, moving the focal point back to the retina, allowing for clear vision.

Signup and view all the flashcards

Ray diagrams: light direction

Light rays traveling into the eye are represented as solid lines, while those going beyond the retina are shown as dotted lines.

Signup and view all the flashcards

Ray diagrams: distant objects

Light rays from a distant object should be drawn as parallel lines, as they are assumed to originate from a very far source.

Signup and view all the flashcards

Ray diagrams: near objects

Light rays from a near object should be drawn diverging from one point, signifying they spread out after starting from a nearby location.

Signup and view all the flashcards

Ray diagrams: arrowheads

Arrowheads are added to all light rays to indicate their direction of travel, which is crucial for understanding the light path within the eye.

Signup and view all the flashcards

What is red-green color blindness?

A condition where people have difficulty distinguishing between certain colors, primarily shades of red and green.

Signup and view all the flashcards

What is astigmatism?

A visual defect occurring when the cornea or lens has an irregular shape, causing blurred vision.

Signup and view all the flashcards

What is a cataract?

A cloudy area that forms inside the lens of the eye, hindering vision.

Signup and view all the flashcards

What is glaucoma?

Eye diseases that damage the optic nerve, causing a gradual loss of peripheral vision, potentially leading to blindness.

Signup and view all the flashcards

What is macular degeneration?

An eye disease affecting the macula, a region of the retina responsible for central vision, resulting in a loss of vision in the center of the visual field.

Signup and view all the flashcards

What are aids for color-blind people?

Specialized lenses or mobile phone applications designed to help color-blind individuals perceive colors more accurately.

Signup and view all the flashcards

What are test cards for color blindness?

Techniques or devices used to detect color blindness. These devices include special colored test cards with patterns that people with normal vision can easily identify while those with color blindness may have difficulty.

Signup and view all the flashcards

What is a refraction error?

A refractive error of the eye where incoming light rays do not converge at a single point on the retina, leading to blurred vision.

Signup and view all the flashcards

Sound wave to vibration

The outer ear collects sound waves through the pinna and auditory canal, converting them into mechanical vibrations at the eardrum.

Signup and view all the flashcards

Middle ear amplification

Tiny bones in the middle ear amplify and transmit vibrations from the eardrum to the oval window, enhancing the signal.

Signup and view all the flashcards

Vibrations to waves

Vibrations at the oval window cause waves in the fluid (endolymph) within the cochlea.

Signup and view all the flashcards

Hair cell stimulation

The sensory hair cells in the cochlea are stimulated by the movement of the fluid, triggering nerve impulses along the auditory nerve.

Signup and view all the flashcards

Brain interpretation

The brain interprets the nerve impulses as sound, allowing us to perceive different frequencies and loudness.

Signup and view all the flashcards

Semicircular canals

The three semicircular canals in the inner ear are filled with fluid and contain hair cells. Movements of the head cause the fluid to move, stimulating the hair cells.

Signup and view all the flashcards

Anterior canal function

The anterior canal senses the head nodding forwards or backwards.

Signup and view all the flashcards

Posterior canal function

The posterior canal senses the head tilting towards the right or left shoulder.

Signup and view all the flashcards

Study Notes

Stimuli, Receptors, and Responses

  • Organisms can detect and respond to stimuli (changes in their environment)
  • Irritability is an organism's ability to detect stimuli and respond appropriately
  • Stimuli can be internal or external and are detected by sensory cells called receptors
  • Receptors often group together to form sense organs. Examples of sense organs in humans are the eyes and ears.

Human Eyes

  • Eyes are the sense organs for detecting light
  • About 80% of environmental information comes from sight
  • Structures surrounding the eye: eyebrows, eyelashes, eyelids, tear glands
  • Eyebrows prevent sweat from entering the eye
  • Eyelashes trap dirt
  • Eyelids protect the eye from foreign objects and bright light
  • Tear glands produce tears to keep the eye moist and clean, containing an enzyme that kills bacteria.

Internal Structures of the Eye

  • Eyeball is composed of 3 layers: sclera, choroid, retina
  • Sclera: tough outer layer, gives shape and protects, eye muscles attach to it
  • Cornea: transparent, front of the eye, light enters through it, refracts light
  • Choroid: blood vessels and a dark pigment; absorbs light to prevent reflection
  • Retina: contains rods and cone cells to detect light
    • Rods: stimulated by low light levels, black and white vision
    • Cones: stimulated by high light levels, colour vision; concentrated in the fovea (yellow spot)
  • Light is passed through the cornea, aqueous humor, lens, and vitreous humor, eventually focusing onto the retina to create an image. The brain interprets these signals to produce vision

Eye Accommodation

  • The lens changes shape to focus on objects at different distances
  • Focusing on a near object: ciliary muscles contract, suspensory ligaments loosen; lens becomes thicker (more convex)
  • Focusing on a distant object: ciliary muscles relax, suspensory ligaments tighten; lens becomes thinner (less convex)

Eye Defects and Correction

  • Short-sight (Myopia): Eyeball too long or lens too thick, distant objects blurry

  • Correction: Concave (diverging) lens to spread out light rays before they enter the eye

  • Long-sight (Hyperopia): Eyeball too short or lens too thin, near objects blurry

  • Correction: Convex (converging) lens to converge light rays before they enter the eye

Human Ears

  • Ears detect sound
  • Three parts: outer ear, middle ear, inner ear
  • Outer ear: pinna (collects sound waves), auditory canal (directs waves to eardrum)
  • Middle ear: eardrum (vibrates), ear bones (amplify vibration; transmit to oval window)
  • Inner ear: oval window (transmits vibrations to cochlea), round window(releases pressure), semicircular canals (detect head movement), cochlea (filled with liquid; vibrations stimulate sensory hair cells; generates signals that travel to the brain through the auditory nerve)

Phototropic Responses in Plants

  • Phototropism: directional growth in response to unilateral light (light coming from one direction)
  • Shoots grow toward light (positive phototropism). Roots grow away from light (negative phototropism).
  • Auxins are plant hormones that control growth in shoots and roots and are involved in phototropism. Auxins move to the shaded side, resulting in unequal growth and the bending of the plant part toward the light source.
  • Auxin concentration affects both shoot and root growth differently. High concentrations promote shoot growth but inhibit root growth

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Stimuli, Receptors, and Responses (TE 16) PDF

Description

Test your knowledge about color vision and the photoreceptor cells in the human eye. This quiz covers key concepts such as the phenomenon of afterimages, the role of cone and rod cells in vision, and how they interact with different colors. It's perfect for students studying biology or anyone interested in visual perception.

More Like This

Color Vision and Perception Quiz
67 questions

Color Vision and Perception Quiz

HallowedHeliotrope avatar
HallowedHeliotrope
BMS 143: Vision Visible Light and Photoreceptors Quiz
33 questions

BMS 143: Vision Visible Light and Photoreceptors Quiz

chuchuchu622 avatar
chuchuchu622
Retina Function and Structure Quiz
5 questions

Retina Function and Structure Quiz

StylishOak avatar
StylishOak
Colour Vision
31 questions

Colour Vision

FeistyOpal8806 avatar
FeistyOpal8806
Use Quizgecko on...
Browser
Open
Browser
Browser