Exam 2: The Biological Basis of Behavior

Insulin and glucagon are secreted by the ________.

The spinal cord is made up of soft, jellylike bundles of long ________.

The complex cable of nerves that connects the brain to the rest of the body is the spinal cord.

Each of the following is true except ________.

A nerve is a group of ________ bundled together.

Differences between hemispheres are greater in women than in men.

The organ lying between the stomach and small intestine that secretes insulin and glucagon to regulate blood-sugar levels is the ________.

Neurons typically have ________.

Chemical substances released by the endocrine glands to help regulate bodily functions are ________.

The period after firing in which a neuron is returning to its normal polarized state and will fire again only if the incoming message is extremely powerful is the ________ period.

George was in an automobile accident several years ago in which he suffered severe head injuries. Since the mishap, he has been unable to form new memories. He can remember everything he did before the accident but he cannot remember what he just said five minutes ago. The part of George's brain the was injured was probably the ________.

Each adrenal gland has ________ part(s).

The gland that produces the largest number of different hormones and has the widest range of effects on the body's functions is the ________ gland.

Neural impulses vary in strength according to the strength of the incoming signal to the neuron.

Intensive inbreeding of animals over many generations in order to create a group of animals that are genetically very similar to one another and different from other groups of animals is called ________ study.

Because they have similar chemical structures, morphine and other narcotics are able to lock into receptor sites for ________.

Prenatal screening techniques such as amniocentesis detect genetic problems in ________ percent of pregnancies.

An organism's entire unique genetic makeup is called its ________.

A brain imaging technique that measures the movement of blood molecules in the brain is ________.

When enough sodium atoms have entered the neuron to make the inside positively charged relative to the outside, the neuron is said to be ________.