homeostasis and human breathing

Question 1

define homeostasis

Answer 1

homeostasis is the ability of an organism to maintain a constant internal environment

Question 2

list variables that need to remain constant for cells to flourish

Answer 2

pH
temperature
concentration of co2 and glucose

Question 3

describe the process of inhalation

Answer 3

the brain sends a message to the diaphragm and intercostal muscles causing them to contract. the ribs move up and out the diaphragm moves down and the volume of the chest cavity increases and the pressure in the chest cavity decreases.

Question 4

describe the process of exhalation

Answer 4

the muscles and diaphragm relax and the ribs move down and in and the diaphragm moves down. the volume decreases and the pressure increases.

Question 5

breathing disorder

Answer 5

asthma

Question 6

cause prevention and treatment of breathing disorder

Answer 6

allergy to pet dander (lower bronchioles become constricted),avoiding allergens, and taking an inhaler/bronchodilator

Question 7

features of alveoli to allow for efficient gas exchange

Answer 7

large SA, enclosed in a network of blood capillaries, moist, one cell thick

Question 8

why is homeostasis important

Answer 8

to maintain a suitable temperature for enzyme reactions

Question 9

state function for epiglottis and larynx

Answer 9

epiglottis- to close off the trachea when eating
larynx- contains vocal cords and they vibrate to produce sound