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Physiology Activity
Week 1
| Question | Answer |
|---|---|
| What term describes a signal traveling toward a particular center or point of reference? | afferent |
| Many complex processes of the body are coordinated at many levels. These include intracellular. | intracellular, intrinsic, and extrinsic. (all) |
| Which of the following is a basic component of every feedback control loop? | sensor mechanism, integrating center, effector, feedback. (all) |
| 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 normal reading or range is called the | set point |
| Extrinsic control usually involves which mode of regulation? | Nervous and Endocrine |
| Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? | intracellular regulation |
| 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 | feed forward |
| The body naturally changes some set points to different values at different times of the day. These daily cyles are called | circadian cycles |
| Processes for maintaining or restoring homeostasis are known as | homeostatic control mechanisms |
| Local control or _____, intrinsic mechanisms often make use of chemical signals. | autoregulation |
| 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 |
| 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. |
| Homeostasis can best be described as: | a state of relative constancy. |
| Which of the following may put one at risk for developing a given disease? | Environment, stress, lifestyle, (all) |
| Intrinsic control: | is sometimes called autoregulation |
| 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 |
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