Quiz Questions: Bio Psych

Homozygous

Having two identical alleles for the same trait.

Corpus callosum

Prominent feature composed of white matter in a sagittal brain section at the midline.

Diencephalon

The thalamus and hypothalamus are considered part of this brain region.

Frontal lobe

Responsible for decision making.

Astrocyte

Structure surrounding the synapse contributing to chemical neurotransmission.

Cell membrane

Regulates the concentration of different ions inside and outside the neuron.

Interneurons

Involved in processing sensory information and sending it to motor neurons.

Protein molecules

Can act as gates, pumps, and change shape.

Protein anions

Contribute to the negative charge inside the cell membrane.

Na+; K+

Channels closed at rest, allowing K+ to enter and leave the cell.

Voltage gradient

The difference in charge between two regions.

Increase the sensitivity of the neuron

NOT an important reason for refractory periods in neurons.

Inhibitory postsynaptic potential (IPSP)

Hyperpolarization making it less likely for a neuron to fire an action potential.

Size and shape of the channel

Determines the ability of membrane channels to selectively allow specific ions.

Neurotransmitters

Found in synaptic vesicles along with structural proteins.