BIOL 3204 EXAM 3 QUESTIONS & ANSWERS
The neurons of the special senses each carry info to cortexes in the brain that are
specific to each sense. However, general sensation info is all carries to the... - Answer -
somatosensory cortex
What is TRUE about the proteins troponin and tropomyosin in skeletal muscle
contraction? - Answer -They inhibit the bindings necessary for contraction
Which of the below is NOT a characteristic of olfaction that we discussed in class? -
Answer -Olfaction is one of the 3 senses contributing to our sense of equilibrium
Which of the following is NOT required prior to skeletal muscle fiber contraction? -
Answer -Ca++ must enter the muscle fiber from the extracellular fluid
A decrease in the release of neurotransmitter from the photoreceptor would indicate
an... - Answer -increase in light intensity
Which is true about tonic receptors? - Answer -They adapt slowly to constant stimulus
If a drug inhibits acetylcholinesterase activity in the neuromuscular junction, what effect
does the drug have on the membrane potential of the muscle fiber? - Answer -It would
remain depolarized
Which is true for a somatic motor neuron action potential but not a skeletal muscle fiber
action potential? - Answer -Leads to release of ACh
The sarcolemma of a muscle fiber serves the same function as the _____ in other cells:
- Answer -cell membrane
In smooth muscle, the Ca2+ necessary for contraction can come from... - Answer -the
sarcoplasmic reticulum; the extracellular fluid
Which phases of a muscle twitch require ATP? - Answer -Relaxation period;
contraction period
In skeletal muscle, after neurotransmitters bind to their receptors the chemically-gated
Na+ channels open. What happens next? - Answer -The opening of voltage-gated Na+
channels
Why do you think the taste receptor cells in a taste bud are joined by tight junctions? -
Answer -To force dissolved chemicals flowing into a taste pore to interact with the taste
receptor cells.
The neurons of the special senses each carry info to cortexes in the brain that are
specific to each sense. However, general sensation info is all carries to the... - Answer -
somatosensory cortex
What is TRUE about the proteins troponin and tropomyosin in skeletal muscle
contraction? - Answer -They inhibit the bindings necessary for contraction
Which of the below is NOT a characteristic of olfaction that we discussed in class? -
Answer -Olfaction is one of the 3 senses contributing to our sense of equilibrium
Which of the following is NOT required prior to skeletal muscle fiber contraction? -
Answer -Ca++ must enter the muscle fiber from the extracellular fluid
A decrease in the release of neurotransmitter from the photoreceptor would indicate
an... - Answer -increase in light intensity
Which is true about tonic receptors? - Answer -They adapt slowly to constant stimulus
If a drug inhibits acetylcholinesterase activity in the neuromuscular junction, what effect
does the drug have on the membrane potential of the muscle fiber? - Answer -It would
remain depolarized
Which is true for a somatic motor neuron action potential but not a skeletal muscle fiber
action potential? - Answer -Leads to release of ACh
The sarcolemma of a muscle fiber serves the same function as the _____ in other cells:
- Answer -cell membrane
In smooth muscle, the Ca2+ necessary for contraction can come from... - Answer -the
sarcoplasmic reticulum; the extracellular fluid
Which phases of a muscle twitch require ATP? - Answer -Relaxation period;
contraction period
In skeletal muscle, after neurotransmitters bind to their receptors the chemically-gated
Na+ channels open. What happens next? - Answer -The opening of voltage-gated Na+
channels
Why do you think the taste receptor cells in a taste bud are joined by tight junctions? -
Answer -To force dissolved chemicals flowing into a taste pore to interact with the taste
receptor cells.
