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WEEK 1 Physiology

INTRO

QuestionAnswer
Events that lead to an immune response to an infection or the formation of a blood clot are examples of Positive feedback Negative feedback Inhabatory feedback Intracellular feedback Negative feedback*
Local control, or ___ intrinsic mechanisms often makes of chemical signals Structural Develpemtnal Autoregulation Autonomous Autoregulation
Extrinsic control usually involves what mode of regulation Nervous Endocrine Integrations Both A & B Both A & B*
Most complex processes of their body are coordinated at many levels. These include Intracellular Intrinsic Extrinsic All of these correct All of these correct
The normal reading or range is called the Set point Regulatory range Feedback point Integrating range Set point
The concept that information may flow ahead to another process to trigger a change in anticipation of an event that will follow is called Integration - forward Control forward Feed forward Homeostasis Feed forward*
Processes for maintaining or restoring homeostasis are known as Sensory mechanism Integrating mechanisms Set point mechanisms Homeostatic control mechanisms Homeostatic control mechanisms
To accomplish self-regulation, a highly complex and integrated communication control system or network is required. This type of network Effector control loop Internal environmental control loop Feedback control loop Cyclical control loop Feedback control loop*
The relatively constant state maintain by the body is known as Anatomy Physiology Metabolism Homeostasis Homeostasis
Because negative feedback control system oppose changes that are opposite in direction to the initial disturbance, they are Slowed or maintained in the homeostatic range Exictatory Passive Stimulatory Slowed or maintained in the homeostatic range
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function Intrinsic regulaiton Extrinsic regulaiton Extracellular regulation Intracellular regulation Intracellular regulation
The body naturally changes some set points to different values at different times of the day. These cycle are called Circadian cycles Set point cycles Physiological cycles Feedback cycles Circadian cycles
The impact of effector activity on sensors may be positive or negative, homeostatic control mechanisms are Neutral feedback systems Organs that are directly influenced by physiological variable or mechanisms Intracellular/ extracellular mechanisms Organs that are directly influenced by physiological variable or mechanisms
What term describes a signal traveling toward a particular centre or point of reference? Efferent Sensory Effector Afferent Afferent
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
Effectors can be described as Organs that are able to identify the variable being controlled Organs that directly influence controlled physiological variables A type of communication control system Inhibitory regulatory organs Organs that directly influence controlled physiological variables
Of all the pathogenic organisms, which are the most complex? Viruses Tapeworms Bacteria Protozoa Viruses
Which of the following is not one of the basic components in a feedback control loop? Effector mechanism Transmitter Sensor Integrating center Transmitter
Positive feedback control systems: Have no effect on the deviation from set point Accelerate a change Ignore a change Do not exist in human systems Accelerate a change
Epidemiology is the study of the ___ of disease in human population Occurrence Distribution Transmission All of the above All of the above
Pathogenesis can be defined as: A specific disease A group of diseases The course of disease development A subgroup of viruses The course of disease development *
Intrinsic control Usually involves the endocrine or nervous system Operates at the cellular level Is sometimes called auto regulation Operates at the system or organism level Is sometimes called auto regulation*
oxytocin during childbirth operated as a negative - feedback loop, what effect will it have on uterine contractions?
 Oxytocin would stimulate stronger contractions no changes in the strength Uterine contractions would be weak, then gain strength Oxytocin would inhibit uterine contractions*
Of the pathogenic organisms which of the following are the most complex? Viruses Tapeworms Bateria Protozoa Tapeworms
Negative feedback loops Oppose a change Accelerate a change Have no effect of the deviation from set point Establish a new set point Oppose a change
Which of the following may put one at risk for developing a given disease? Evnrionment Stress Lifestyle All of the above All of the above
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: Viruses Bacteria Fungi Protozoa Viruses*
Positive feedback control systems Have no effect on the deviation from set point Accelerate a change Ignore a change Do not exist in human system Accelerate a change
Of the 11 major body system, which is the least involved in homeostasis? Circulatory Endocrine Lymphatic Reproductive Reproductive
Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease?
 Virus Bateria Prion Protozoan Prion
Homeostasis can best be describes as:
 A constant state maintained by living and nonliving organisms A state of relative consistency Adaptation to the external environment Changes in body temperature A state of relative consistency
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 term that literally means self - immunity is: Autoimmunity Homoimmunity Passive immunity Active immunity Autoimmunity*
The body’s thermostat is located int the: Heart Cerebellum Pituitary Hypothalamus Hypothalamus
The normal reading or range of normal is called the: Sensor point Set point Effector point Integrator point Set point
Negative-feedback mechanisms Minimize changes in blood glucose levels Maintain homeostasis Are responsible for an increase rate of sweating when air temp is higher than body temp All of the above correct All of the above correct
The contraction of the uterus during childbirth is an example of ___feedback Negative Postive Inhibitory Deviating Postive
Which of the following is a basic component of every feedback control loop?
 Sensor mechanism Integrating center Effector Feedback All of these are correct All of these are correct
Created by: sabrinaseher
 

 



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