Human Tissues/Homeostasis and Feedback Mechanisms

Question 1

Tissue Types

Answer 1

Connective
Epithelial
Muscle
Neural

Question 2

Connective Structure

Answer 2

characterized by extracellular material that separate cells from one another

Question 3

Connective Function

Answer 3

enclosing and separating connecting tissues to one another

supportive, moving, storing cushioning insulating, transporting, protecting

Question 4

Connective Example

Answer 4

cells of the immune system and blood

Question 5

Epithelial Structure

Answer 5

classified according to the number of cell layers and shapes

Question 6

Epithelial Function

Answer 6

protecting underlying structures
acting as barriers
permitting the passage of substances secreting substances

Question 7

Epithelial Example

Answer 7

skin, linings of internal organs

Question 8

Muscle Structure

Answer 8

cells of muscles resemble long threads called fibers

Question 9

Muscle Function

Answer 9

providing movement

Question 10

Muscle Example

Answer 10

heart, organs of digestive system

Question 11

Neural Structure

Answer 11

cells are composed of dendrites, cell bodies, and axons

Question 12

Neural Function

Answer 12

coordinating and controlling many body activities

Question 13

Neural Example

Answer 13

brain, spinal cord

Question 14

Homeostasis

Answer 14

existence and maintenance of a relatively constant environment within the body. Each cell of the body is surrounded by a small amount of fluid, and the normal functions of each cell depend on the maintenance of its fluid environment within a narrow range of conditions, including temperature, volume, and chemical content

Question 15

variables

Answer 15

conditions- temperature, volume, and chemical content

For example, body temperature is a variable that can increase in a hot environment or decrease in a cold environment.

Question 16

Feedback Mechanisms

Answer 16

Positive

Negative

Question 17

Negative Feedback Mechanisms

Answer 17

Most systems of the body are regulated by negative

Help maintain homeostasis

Negative means that any deviation from the set point is made smaller or is resisted.

The maintenance of normal blood pressure is a negative-feedback mechanism. Normal blood pressure is important because it is responsible for moving blood from the heart to tissues

Question 18

Positive-feedback mechanisms

Answer 18

are not homeostatic and are rare in healthy individuals

Positive means that when a deviation from a normal value occurs, the response of the system is to make the deviation even greater.

usually creates a cycle leading away from homeostasis and, in some cases, results in death. Inadequate delivery of blood to cardiac muscle is an example of positive feedback