APK2105C CH 1
A positive feedback mechanism is prevented from spiraling out of control by __________.
1. A factor that removes the stimulus 2. A factor that limits the system's ability to respond to the stimulus 3. A factor that stops the feedback loop
The functions of epithelial cells
Acting as a physical barrier to the movement of molecules & protection
Which protein in the body provides TENSILE strength to resist stretching?
Collagen
Collagen is a protein found in which type of tissue?
Connective
In a negative feedback loop, glands and muscles are __________.
Effectors
The drop in blood pressure that can occur when a person stands up too quickly is a(n) _____
Error Signal
T/F: All muscle tissue is under voluntary control.
False
T/F: Connective tissue forms both endocrine and exocrine glands
False; Epithelial forms both endocrine and exocrine glands
T/F: Red blood cells are part of the extracellular fluid compartment.
False; Red blood cells circulate in the extracellular fluid, but because they are cells, they are not considered to be actually part of this fluid compartment.
Intracellular fluid has a __________ concentration of proteins and potassium, as compared to extracellular fluid.
Higher
Most of the body's water is contained in the __________.
ICF
The spleen is an organ that is part of the __________ system.
Immune
What is the primary mechanism for maintaining homeostasis?
Negative Feedback
A mechanism that "corrects" the deviation of a physiological variable from its set point is called _____.
Negative feedback
The integration center for homeostatic control of blood glucose is the __________.
Pancreas
Extracellular fluid is equal to __________.
Plasma + ISF
Both intracellular and extracellular fluids contain _____ , ______ & _______.
Proteins, sodium & potassium (The intracellular and extracellular fluids contain many of the same types of ions and molecules, such as proteins, but in different proportions.)
In diabetes mellitus, glucose appears in the urine because the kidney has failed to __________ it.
Reabsorb
T/F: Connective tissue consists of cells dispersed in a noncellular material called the matrix.
True
The sensors that regulate body temperature during homeostasis are called __________.
chemoreceptors
Negative feedback _____.
moves a physiological variable back toward the set point
Negative feedback __________.
moves a physiological variable back toward the set point