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Rosemarie Lim
Week 1 Chapter Quiz
Question | Answer |
---|---|
Local control or _____, intrinsic mechanisms often make use of chemical signals. structural developmental | autoregulation |
The body naturally changes some set points to different values at different times of the day. These daily cycles are called | circadian cycles. |
The normal reading or range is called the | set point. |
Many complex processes of the body are coordinated at many levels. These include intracellular. | All of these are correct. |
Processes for maintaining or restoring homeostasis are known as sensor mechanisms. | homeostatic control 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 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. |
Events that lead to an immune response to an infection or the formation of a blood clot are examples of | positive feedback. |
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. | feed-forward. |
Of the 11 major body systems, which is the least involved in maintaining homeostasis? | 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? | Prion |
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 and C. |
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? intrinsic regulation | intracellular regulation |
Effectors can be described as organs that are able to identify the variable being controlled. | organs that directly influence controlled physiological variables. |
Extrinsic control usually involves which mode of regulation? | nervous endocrine Both A and B are correct. |
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. |
What term describes a signal traveling toward a particular center or point of reference? | afferent |