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Physiology Week 1-6

Physiology Midterm

QuestionAnswer
What term describes a signal traveling toward a particular center or point of reference? Efferent Sensory Effector Afferent Afferent
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? Intrinsic regulation Extrinsic regulation Extracellular regulation Intracellular regulation Intracellular Regulation
Local control or ——, intrinsic mechanisms often make use of chemical signals. Structural Developmental Autoregulation Autonomous Autoregulation
The body naturally changes some set points to different values at different times of the day. These daily cycles are called Circadian cycles Set point cycles Physiological cycles Feedback cycles Circadian cycles
The normal reading or range is called the Set point
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
Effectors can be described as organs that directly influence controlled physiological variables.
The relatively constant state maintained by the body is known as homeostasis
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.
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 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 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
Processes for maintaining or restoring homeostasis are known as homeostatic control mechanisms
Extrinsic control usually involves which mode of regulation? nervous & endocrine
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
Events that lead to an immune response to an infection or the formation of a blood clot are examples of positive feedback
Of the pathogenic organisms, which of the following are the most complex? Viruses Tapeworms Bacteria Protozoa tapeworms
Negative-feedback control systems: oppose a change. accelerate a change. have no effect on the deviation from set point. establish a new set point. oppose a change
Created by: k8y
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