Review Questions

Where does perception occur?

1. spinal cord
2. cerebral cortex
3. receptors
4. thalamus

If a person’s cold receptors no longer convert cold stimuli into sensory signals, that person has a problem with the process of ________.

1. reception
2. transmission
3. perception
4. transduction

After somatosensory transduction, the sensory signal travels through the brain as a(n) _____ signal.

1. electrical
2. pressure
3. optical
4. thermal

_____ are found only in _____ skin, and detect skin deflection.

1. Meissner’s corpuscles: hairy
2. Merkel’s disks: glabrous
3. hair receptors: hairy
4. Krause end bulbs: hairy

If you were to burn your epidermis, what receptor type would you most likely burn?

1. free nerve endings
2. Ruffini endings
3. Pacinian corpuscle
4. hair receptors

Which of the following has the fewest taste receptors?

1. fungiform papillae
2. circumvallate papillae
3. foliate papillae
4. filiform papillae

How many different taste molecules do taste cells each detect?

1. one
2. five
3. ten
4. It depends on the spot on the tongue

Salty foods activate the taste cells by _____.

1. exciting the taste cell directly
2. causing hydrogen ions to enter the cell
3. causing sodium channels to close
4. binding directly to the receptors

All sensory signals except _____ travel to the _____ in the brain before the cerebral cortex.

1. vision; thalamus
2. olfaction; thalamus
3. vision; cranial nerves
4. olfaction; cranial nerves

In sound, pitch is measured in _____, and volume is measured in _____.

1. nanometers (nm); decibels (dB)
2. decibels (dB); nanometers (nm)
3. decibels (dB); hertz (Hz)
4. hertz (Hz); decibels (dB)

Auditory hair cells are indirectly anchored to the _____.

1. basilar membrane
2. oval window
3. tectorial membrane
4. ossicles

Which of the following are found both in the auditory system and the vestibular system?

1. basilar membrane
2. hair cells
3. semicircular canals
4. ossicles

Why do people over 55 often need reading glasses?

1. Their cornea no longer focuses correctly.
2. Their lens no longer focuses correctly.
3. Their eyeball has elongated with age, causing images to focus in front of their retina.
4. Their retina has thinned with age, making vision more difficult.

Why is it easier to see images at night using peripheral, rather than the central, vision?

1. Cones are denser in the periphery of the retina.
2. Bipolar cells are denser in the periphery of the retina.
3. Rods are denser in the periphery of the retina.
4. The optic nerve exits at the periphery of the retina.

A person catching a ball must coordinate her head and eyes. What part of the brain is helping to do this?

1. hypothalamus
2. pineal gland
3. thalamus
4. superior colliculus