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Chap 2

Week 1 Homeostasis

QuestionAnswer
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.
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: Viruses
The normal reading or range of normal is called the: Setpoint
Shivering to try to raise your body temperature back to normal would be an example of: the body trying to maintain homeostasis. a positive-feedback mechanism. a negative-feedback mechanism. Both A & C Both A & C the body trying to maintain homeostasis a negative-feedback mechanism.
Epidemiology is the study of the _____ of diseases in human populations. occurrence distribution transmission All of the above are correct. All of the above are correct.
The term that literally means self-immunity is: autoimmunity.
Positive-feedback control systems: accelerate a change.
Pathogenesis can be defined as: the course of disease development.
The body’s thermostat is located in the: hypothalamus
Of the pathogenic organisms, which of the following are the most complex? Tapeworms
Homeostasis can best be described as: a state of relative constancy.
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. All of the above are correct. All of the above are correct.
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
The contraction of the uterus during the birth of a baby is an example of _____ feedback. positive
Intrinsic control: is sometimes called autoregulation.
Of the 11 major body systems, which is the least involved in maintaining homeostasis? reproductive
Negative-feedback control systems: oppose a change
Which of the following is a basic component of every feedback control loop? -sensor mechanism -integrating center -effector -feedback -All of these are components of a feedback control loop. All of these are components of a feedback control loop.
The body naturally changes some set points to different values at different times of the day. These daily cyles are called circadian cycles.
Which of the following is a basic component of every feedback control loop? sensor mechanism integrating center effector feedback All of these are components of a feedback control loop. All of these are components of a feedback control loop.
Local control or _____, intrinsic mechanisms often make use of chemical signals. Autoregulation
Processes for maintaining or restoring homeostasis are known as homeostatic control mechanisms.
The normal reading or range is called the set point.
What term describes a signal traveling toward a particular center or point of reference? afferent
Events that lead to an immune response to an infection or the formation of a blood clot are examples of positive feedback.
Effectors can be described as organs that directly influence controlled physiological variables
Extrinsic control usually involves which mode of regulation? nervous endocrine Both A and B are correct. nervous, endocrine Both A and B are correct.
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.
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.
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.
The relatively constant state maintained by the body is known as homeostasis.
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.
Many complex processes of the body are coordinated at many levels. These include - intracellular. -intrinsic. -extrinsic. All of these are correct. All of these are correct.
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? intracellular regulation intracellular regulation
Which of the following may put one at risk for developing a given disease? -Environment -Stress -Lifestyle -All of the above All of the above
The term that literally means self-immunity is: autoimmunity.
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.
Positive-feedback control systems: accelerate a change.
Created by: Crystal C
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