Chapter 9 Sac 2

Question 0

Sample

Answer 0

The group of participants in a research study selected from, and representative of, a population of research interest

Question 1

Population

Answer 1

The larger group of research interest from which a sample in a research study has been drawn

Question 2

Operational variable

Answer 2

A variable defined or described in terms of the procedures used to observe and measure it

Question 3

Extraneous variable

Answer 3

In an experiment, a variable other then the IV that might cause unwanted changes in the DV

Question 4

Controlled variable

Answer 4

An extraneous variable whose influence has been eliminated from an experiment so that it cannot affect results; it had been controlled

Question 5

Central nervous system (CNS)

Answer 5

A major division of the nervousness system consisting of all the nerves in the brain and spinal cord

Question 6

Spinal cord

Answer 6

A part of the CNS that consists of a cable of nerve fibres stretching from the base of the brain to the lower back; connects the brain to the PNS and transmits sensory information from the PNS to the brain and motor messages from the brain to the PNS.

Question 7

Peripheral nervous system (PNS)

Answer 7

A major division of the nervous system consisting of all the nerves outside the CNS; transmits sensory information inwards to the CNS and transmits motor messages from the brain outwards to the rest of the body.

Question 8

Somatic nervous system

Answer 8

The division of the PNS that transmits sensory information received from the sensory receptors cells inwards towards the CNS, and motor messages from the CNS to the body’s voluntary skeletal muscles; also known as the skeletal nervous system.

Question 9

Autonomic nervous system (ANS)

Answer 9

The division of the PNS that transmits motor messages from the brain to the body’s internal organs and glands, which results in involuntary activity of internal organs and glands, and transmits messages back to the brain about the activity levels of these organs and glands

Question 10

Sympathetic nervous system

Answer 10

The branch of the ANS that alters the activity level of internal muscles, organs and glands to physically prepare out body for increased activity during times of high emotional or physical arousal

Question 11

Parasympathetic nervous system

Answer 11

The branch of the ANS that maintains an energy level appropriate for normal bodily functioning and physically calms us after high arousal by reversing the changes in bodily functioning caused by the domination of the sympathetic nervous system