Action potentials generally are not propagated along dendrites because they lack:
Loss of sensation, but preserved motor control
Suppose a virus damaged only the dorsal roots of the spinal cord, but not the ventral roots. What would happen to the sensory and motor abilities of the affected area?
An action potential and no neurotransmitter release
If we take a frog heart that remains connected to the vagus nerve and place it in a water bath depleted of calcium, stimulation to the vagus nerve will result in:
Each parent is either homozygous for the recessive gene or heterozygous
In one family, all three children are homozygous for a recessive gene. What can be concluded about the parents?
The specialized presynaptic membrane receptors that remove molecules of transmitter from the synapse are called:
What receives excitation from other neurons and conducts impulses to muscle or gland cells?
father aa, mother AA
Suppose "A" is a dominant gene for the ability to curl the tongue lengthwise, and "a" is a recessive gene for the inability to do so. Which of the following couples can be certain that all their children will be able to curl their tongue lengthwise?
the role of electricity in animal systems and the structure of the action potential
Via their work with the squid giant axon, Huxley and Hodgkin were the first to identify:
Knowing that is is appropriate to tackle people on the football field, but not in the classroom is dependent on functioning of the:
Amoeboid-like glial cells that can move about and engulf foreign particles and debris are called:
out of the cell; into the cell
The sodium-potassium pump pumps sodium ions--- and potassium ions---:
An impairment of eating, drinking, temperature regulation, or sexual behavior suggest possible damage to which brain structure?
Which division of the nervous system consists of neurons that control the heart, intestines, and other organs?
The neurotransmitter GABA exerts --- effects, and its effects are almost always ---
dendrite, cell body, axon
Which of the following is the correct order of transmission of information within a neuron?
Given no mistreatment, there are no differences between short 5-HT alleled individuals and long 5-HT alleled individuals
The results of Caspi's examination of the ink between depression and childhood mistreatment support which of the following statements?
Anadamide breaks down in the synapse fairly quickly
Why is there no perceptual "high" associated with the activation of cannaboid receptors when anadamide is the transmitter bound to the receptor site?
Which love seems to be especially involved in the comprehension of spoken language in humans?
What is the difference in voltage called that typically exists between the inside and the outside of a neuron?
individuals spread their genes by helping their relatives
Kin selection as an explanation for altruistic behavior would argue that:
In a football game, having two players tackle an opponent at the same time will be more effective than if a single player tries to tackle the opponent alone. THe cumulative effect of simultaneous tackling is similar to what principle of synaptic communication?
Saltatory conduction --- the velocity of action potentials, and --- the amount of energy used by the neuron
Seeing a snake come out of the drain in the bathtub might increase your heart rate, dilate your pupils, cause you to sweat, and raise the hair on your neck. THese responses are due to the activity of the --- nervous system
a neuron produces an action potential of maximal strength, or none at all
The all-or-none law states that:
The sodium gates in the membrane close
After the peak of an actin potential, what prevents sodium ions from continuing to enter the cell?
Botulinum toxis exerts its effects --- by blocking --- channels on the presynaptic cell
What is the approximate resting potential of the inside of a neuron's membrane, relative to the outside?
vagus nerve release acetylcholine which decreases heart rate
Otto Loewi's experiments were the first to demonstrate the action of neurotransmitter. He showed that:
the X chromosome
In general, when biologists speak of sex-linked genes they are referring to genes on the:
calcium into the cell
When an action potential reaches the end of a neuron, the depolarization causes what ionic movement in the presynaptic cell?
only certain molecules are allowed to cross the membrane freely
Which of the following describes selective permeability?