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