Discovering Psychology - Topic 10

What is meant by the 'all-or-none' law of the axon?

• Either the axon produces an action potential, or it doesn't

• When one axon produces an action potential, all of them do

• All axons throughout the nervous system produce action potentials of equal strength in people

• Incoming input must excite all the dendrites, or the axon won't produce an action potential

What is an action potential?

• An impulse that flows down an axon by electrical conduction

• An impulse that flows down an axon by movement of chemical ions

• A decision someone makes to start doing something

• A machine that measures brain activity

Which of the following is true of receptors for neurotransmitters?

• All neurotransmitters attach to one type of receptor, and inhibitory transmitters use another

• Excitatory transmitters attach to one type of receptor, and inhibitory transmitters use another

• Each neurotransmitter has its own receptor

• Each neurotransmitter can attach to several types of receptors with different properties

What is meant by 'blindsight'?

• The ability of blind people to find their way around by using other senses

• The ability to perceive objects without using any sensory information

• The tendency to see optical illusions, such as thinking one line is longer than another when both are really the same

• The ability to respond to visual stimuli without conscious awareness of those stimuli

After damage to the corpus callosum, a person can describe what he or she feels only after feeling it with the ___ hand, which sends information to the ___ hemisphere

• Left, left

• Left, right

• Right, left

• Right, right

PET measures ___ and fMRI measures ___

• Electrical activity on the scalp.... magnetic activity on the scalp

• Magnetic activity on the scalp... electrical activity on the scalp

• Oxygen use in brain areas... glucose supply to the brain areas

• Glucose supply to the brain areas... oxygen use in brain areas

The cerebellum is important for behaviours that require which of the following?

• Prolonged exertion

• Accurate timing

• Reflexive action

• Coordinating vision with hearing

Which of the following defines the binding problem?

• The question of how the brain creates a unified experience form sensations analysed by separate brain areas

• The question of how a person converts sensory information into motor output

• The question of how the brain compares information in the left hemisphere to information in the right hemisphere

• The question of how people coordinate movement of the left hand with movement of the right hand

What is meant by a 'sex-limited' gene?

• A gene that exerts its effects on mainly one sex or the other

• A gene that occurs on the X chromosome

• A gene that occurs on the Y chromosome

• A gene that occurs on either the X or Y chromosome