PBIO MIDTERM 2 MISTAKES

the “adequate stimulus” for a sensory receptor

is the type of stimulus that is most effective in activating the sensory receptor

sensory receptors are specialized cells that

convert physical stimuli into changes in membrane potential

how do phasic sensory receptors respond to sustained, long-lasting stimuli?

response declines over time

What’s the difference between the somatosensory neural pathways for pain and fine touch?

the location of the secondary sensory neuron

where are taste receptors found in the body?

in the mouth, digestive tract, and lungs

how many different olfactory receptors proteins are found in each single olfactory sensory neuron?

1

what are the major sensory modalities that converge in the brain to generate what we call “flavor”?

taste, olfactory, and somatosensory

which of the following structure is not directly involved in audition?

semicircular canal

what is the function of the ossicles in the middle ear?

transmit sound waves from the outer to the inner ear

what determines the optimal sound frequency that stimulate hair cell receptor in the cochlea?

its position along the basilar membrane

which of the following is involved in detecting rotational movements of the head?

the semicircular canal

function of vestibulo-ocular reflex

maintain visual fixation during head movements

what initiates the visual experience?

phototransduction

during active muscle contractions, transient chemical bonds are formed between

thick and thin filaments composed mostly of myosin and actin

the relaxation phase of muscle contraction occurs as

Ca2+ ions are pumped back into the SR

during a voluntary movement, motor units are recruited in order of 

increasing force

it is thought that motor neurons in the spinal cord are normally activated in order of increasing size because

the smaller the cell, the higher the input resistance

the knee jerk reflex is initiated by

the activation of sensory afferent fibers innervating muscle spindles

diseases affecting the cerebellum produce all of the following except:

paralysis