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Physiology

Week 1 Chapter 2

QuestionAnswer
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? intracellular regulation
The body naturally changes some set points to different values at different times of the day. These daily cycles are called circadian cycles
Effectors can be described as organs that directly influence controlled physiological variables
Local control or _____, intrinsic mechanisms often make use of chemical signals. autoregulation
What term describes a signal traveling toward a particular center or point of reference? afferent
The concept that information may flow ahead to another process to trigger a change in anticipation of an event that will follow is called feed-forward
The impact of effector activity on sensors may be positive or negative. Therefore, homeostatic control mechanisms are categorized as organs that are directly influenced by physiological variables or mechanisms
The normal reading or range is called the set point
The relatively constant state maintained by the body is known as homeostasis
Which of the following is a basic component of every feedback control loop? sensor mechanism, integrating center, effector, feedback
Events that lead to an immune response to an infection or the formation of a blood clot are examples of positive feedback
Many complex processes of the body are coordinated at many levels. These include intracellular, intrinsic, extrinsic
To accomplish self-regulation, a highly complex and integrated communication control system or network is required. This type of network is called a(n) feedback control loop
Because negative feedback control systems oppose changes that are opposite in direction to the initial disturbance, they are slowed or maintained in the homeostatic range
Extrinsic control usually involves which mode of regulation? nervous and endocrine
Processes for maintaining or restoring homeostasis are known as homeostatic control mechanisms
Positive-feedback control systems: accelerate a change
Negative-feedback control systems: oppose a change
Shivering to try to raise your body temperature back to normal would be an example of: the body trying to maintain homeostasis and a negative-feedback mechanism
The term that literally means self-immunity is: autoimmunity
Negative-feedback control systems: oppose a change
The body’s thermostat is located in the: hypothalamus
Which of the following may put one at risk for developing a given disease? Environment, stress, and lifestlye
Of the pathogenic organisms, which of the following are the most complex? Tapeworms
The term that literally means self-immunity is: autoimmunity
Positive-feedback control systems: accelerate a change
Intrinsic control: is sometimes called autoregulation
Pathogenesis can be defined as: the course of disease development
Epidemiology is the study of the _____ of diseases in human populations. occurrence, distribution, transmission
Homeostasis can best be described as: a state of relative constancy
Of the 11 major body systems, which is the least involved in maintaining homeostasis? Reproductive
Negative-feedback mechanisms: minimize changes in blood glucose levels, maintain homeostasis, are responsible for an increased rate of sweating when air temperature is higher than body temperature.
If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions? Oxytocin would inhibit uterine contractions.
Shivering to try to raise your body temperature back to normal would be an example of: the body trying to maintain homeostasis and a negative-feedback mechanism.
Which of the following is not one of the basic components in a feedback control loop? Transmitter
Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease? Prion
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: viruses
The contraction of the uterus during the birth of a baby is an example of _____ feedback. positive
The normal reading or range of normal is called the: set point
Which of the following is a basic component of every feedback control loop? sensor mechanism, integrating center , effector , and feedback
Created by: ashleysummers
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