Deck 9 (MR): The Senses

Question 1

Which of the following statements are true of muscle sense (Select all that apply)?

A)The receptors detect the contraction of muscles.
B)The brain forms a mental picture of where the muscles are.
C)Conscious muscle sense is integrated in the cerebellum.
D)Unconscious muscle sense contributes to the coordination of voluntary movements.
E)Muscle sense may be conscious when learning a motor skill,and then become unconscious when the skill is mastered.
F)The receptors are called proprioceptors.

Answer 1

B,D,E,F

Question 2

Which of the following statements are true of sensory pathways (Select all that apply)?

A)Sensory neurons carry impulses from receptors to the CNS.
B)Sensory tracts include peripheral nerves such as the femoral nerve.
C)Sensory receptors are different in that each type detects a specific type of change.
D)Sensory receptors are similar in that they all interpret impulses the same way.
E)Most of the sensory areas are in the cerebral cortex.
F)The cranial nerves involved in sensations are part of sensory tracts.

Answer 2

A,C,E

Question 3

Which of the following statements are true of the parts of the eye (Select all that apply)?

A)The circular muscles of the iris dilate the pupil.
B)Aqueous humor is the tissue fluid of the eye; it nourishes the lens and cornea.
C)The superior rectus muscle pulls the eyeball downward.
D)The optic nerve passes through the eyeball at the fovea.
E)The cranial nerves for movement of the eyeball are the abducens,optic,and trochlear.
F)The suspensory ligaments help keep the iris in place.g.The retina contains rods and cones,the photoreceptors.
H)The macula is in the center of the optic disc.

Answer 3

B,G

Question 4

Which of the following statements are true of the senses of taste and smell (Select all that apply)?

A)The cranial nerves for taste are the glossopharyngeal and hypoglossal.
B)The cranial nerves for smell are the olfactory nerves.
C)The receptors for taste and smell are chemoreceptors.
D)Each olfactory receptor can detect many different vapors.
E)The sensory areas for taste and smell are in the frontal lobes.
F)The sense of smell is largely dependent on the sense of taste.

Question 5

Which of the following statements are true of the characteristics of sensations (Select all that apply)?

A)Projection of a sensation means how the body will make use of it.
B)The contrast of a sensation is the length of time it is felt.
C)When a sensation seems to continue after the stimulus has stopped,it has an after-image.
D)Adaptation means that the conscious brain may eventually ignore a continuing stimulus.
E)Increasing intensity means that more receptors are generating more impulses.
F)Adaptation may occur when there is no longer a change for receptors to detect.

Question 6

Which of the following statements are true of the ear (Select all that apply)?

A)The cochlea contains the receptors for hearing.
B)The auditory bones,in the order they vibrate,are the malleus,incus,and stapes.
C)The nerves for hearing and equilibrium are the ninth cranial nerves.
D)The receptors that detect movement of the head are hair cells in the organ of Corti.
E)The four semicircular canals have hair cells that respond to gravity.
F)Air pressure in the middle ear cavity is regulated by the mastoid sinus.
G)The auditory areas are in the temporal lobes,and both the cerebrum and cerebellum are concerned with equilibrium.
H)The utricle and saccule have accessory receptors for hearing low-pitch sounds.

Question 7

Which of the following statements are true of the cutaneous senses (Select all that apply)?

A)Most of the receptors are in the epidermis.
B)The receptors for pain,touch,and temperature are encapsulated nerve endings.
C)The sensitivity of an area of skin depends on how close the receptors are to the surface.
D)Irritating substances in the skin can trigger itch or pain sensations.
E)Adaptation occurs with the senses of touch and pressure. f.Contrast is an important aspect of cutaneous temperature sense.

Question 8

Which of the following statements are true of the physiology of vision (Select all that apply)?

A)Cones are the receptors for color and are most numerous in the optic disc.
B)The lens adjusts for distant vision,and the cornea adjusts for near vision.
C)For near vision,the pupils dilate and the eyes converge.
D)The optic chiasma is a crossing of optic nerve fibers that contributes to binocular vision.
E)The visual areas are in the occipital lobes of the cerebrum.
F)Rods are most numerous at the periphery of the retina.
G)The optic tracts for visual impulses include the thalamus and midbrain.
H)Adaptation occurs with the sense of sight,but after-images do not.

Question 9

Which of the following statements are true of arterial receptors (Select all that apply)?

A)Pressoreceptors detect changes in blood pressure.
B)These receptors are found in the carotid arteries,which are within the brain.
C)These receptors are also in the aortic arch,which is in the thoracic cavity.
D)Arterial chemoreceptors detect changes in nutrient levels in the blood.
E)The information from these receptors is used to make changes in breathing and heart rate.
F)The cranial nerves that are sensory are the facial and glossopharyngeal.

Question 10

Which of the following statements are true of the parts of the eye (Select all that apply)?

A)Vitreous humor is reabsorbed into the canal of Schlemm.
B)The radial muscles of the iris constrict the pupil.
C)The white of the eye is formed by the sclera.
D)The choroid layer absorbs light within the eyeball.
E)The conjunctivae are kept moist by tears secreted by the lacrimal glands.
F)The retina is the innermost layer of the eyeball.
G)The ciliary muscle is a circular smooth muscle that changes the shape of the cornea.
H)The optic nerve is formed by ganglion neurons.