Group 3: sections 1_7-1_8
What is the term for the homeostatic regulation mechanism in which a cell, tissue, organ, or organ system adjusts its activities without input from the nervous or endocrine system in response to an environmental change?
autoregulation
What is the term for homeostatic regulation in which the nervous system or the endocrine system adjusts the body's functioning in response to a change in homeostasis?
extrinsic regulation
Which statement best describes how a negative feedback system works?
in negative feedback, the response of the body negates or counteracts a disruption of homeostasis.
Which of the following statements best characterizes positive feedback control of homeostasis?
in positive feedback, the response of the body enhances the original change in homeostasis.
The mechanism by which a stimulus outside normal limits triggers a response that opposes or negates the stimulus is called __________.
negative feedback
Which of the following homeostatic regulatory mechanisms involves a response to a stimulus that reverses or negates the stimulus?
negative feedback
Multiple body systems work together to maintain homeostasis in our bodies. Which system is NOT involved in maintaining the body's fluid volume?
the respiratory system
In the homeostatic regulation of body temperature, which of the following is the control center?
the thermoregulatory center in the brain
What is the role of the effector in homeostatic regulation?
to respond to the commands of the control center
In homeostatic regulation of the body's internal environment, which of the following statements is most accurate?
In the human population, there is a wide range of normal set point values.
Which of the choices contains the sequence of anatomical directions equivalent to ventral, posterior, superior, inferior?
anterior, dorsal, cephalic, caudal
In the middle of winter, we need to stay warm. In regulating the temperature in your home, the thermostat plays which part of the control system?
control center
Which part of a homeostatic control system receives information about a change in the body, processes that information, and sends out commands to correct the change?
control center
Multiple body systems work together to maintain homeostasis in our bodies. Which of the following body systems is not involved in maintaining blood pressure?
digestive system
In a typical day, the body is subjected to a variety of changing conditions. The response of multiple physiological systems helping to maintain the body functions keeps us in a state of __________ equilibrium.
dynamic
In negative feedback control of body temperature, the sweat glands and blood vessels of the skin are examples of __________.
effector organs
What is the term for the maintenance of a relatively stable internal environment in an organism?
homeostasis
If the temperature of the body rises above 37°C (about 99°F), negative feedback is triggered to __________.
increase heat loss through enhanced blood flow to the skin and sweating
In a homeostatic system, blood clotting is an example of _________.
positive feedback
The mechanism by which the initial stimulus produces a response that exaggerates the stimulus is most specifically called __________.
positive feedback
Which part of the homeostatic control system detects changes in the internal environment?
receptor
Which of the following is the correct sequence in which the parts of a homeostatic control mechanism operate?
receptor; control center; effector
Homeostasis is the process of maintaining a stable internal environment in the body. What is the term that defines the targeted value to be maintained?
set point
"Homeostasis"refers to _________.
the existence of a stable internal environment
Which of the following statements is not accurate in describing the set point and the normal range of homeostatic regulation?
the set point is a precise value of bodily function that must be maintained perfectly or the body immediately suffers.
