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Flashcards in Science Deck (25):
1

What is homeostasis?

Mechanism that is involved in the regulation of internal environment

2

Limits of the human body in temperature, blood glucose, CO2 concentration and Ph levels:

Temperature(36-38)
Blood glucose (75-95 mg/dL)
CO2 concentration (35-45mmHg)
PH levels( 7.35-7.45)

3

What are the systems that have a important role in homeostasis by monitoring levels?

Nervous and endocrine system

4

What is negative feedback?

Is the most common and important mechanism to regulate physiological process. It helps to return a system to a set point once it deviates sufficiently from that set point

5

Example of homeostasis:

Thermoregulation

6

Part of the brain that helps to regulate the temperature?

Hypothalamus

7

When body temperature rises...?

Metabolic rate falls
Sweating(evaporation of water)
Decrease muscle activity
Body hair sticks to the body

8

When body temperature falls..?

Metabolic rate increase
Body hair bristles
Increase muscle activitiy
Shivering(involuntary)

9

When the body glucose levels are high, what does the pancreas release?

Insulin

10

When blood levels are low, what does pancreas release?

Glucagon

11

Levels of organization of the human body:

Chemical
Cellular
Tissue
Organ
System/apparatus
Organism/ individual

12

What is a tissue?

Group of similar cells joined by a matrix, which performs a specific function

13

What are the 4 types of tissues?

Epithelial, connective, muscular, and nervous

14

Function of epithelial tissue:

Protects, absorbs, excrete, secrete, sensation. Barrier that selectively regulates the exchange of products

15

Function of connective tissue:

Connects, supports and protects organs

16

Function of muscular tissue:

Contributes to the motion, mantains corporal posture, keeps heat in the body.

17

Function ofnervous tissue:

Starts and transmits nervous impulses

18

Examples of epithelial tissue:

Skin surface
Lining of gastrointestinal tract organs

19

Examples of connective tissue:

Dermis
Tendons and ligaments
Bones and cartilage
Adipose and cartilage
Blood

20

Examples of muscular tissue:

Skeletal muscle
Smooth muscle
Cardiac muscle

21

Examples of nervous tissue:

Neurons and nerves

22

What is a organ?

Is made up of tissues that work together to perform a specific activity

23

What is a system/apparatus?

Groups of two or more organs that work together to perform a specific function for the organism.
But system has homogeneous organs and apparatus has heterogeneous organs

24

What’s the function and what are the organs of intergumentary system?

Protects, regulates temperature

Skin, hair, nails, glands(sweat, and sebaceous)

25

What’s the function and what are the organs of skeletal system?

Support, protection and is the movement.

Bones, cartilages, ligaments