Lesson 1-6 (Quiz 1)

Question 1

What is Homeostasis?

Answer 1

Homeostasis is the tendency of organisms to maintain various physiological variables at a specific value known as set points.

Question 2

what is a feedback loop?

Answer 2

A system of interactions in which the output either inhibits or amplifies the system.

Question 3

What is a negative FBL?

Answer 3

It is thermoregulation as if we get too hot we try to cool it down.

Question 4

What is positive FBL?

Answer 4

It is when the result is causing it to increase more (more panic level)

Question 5

how do certain animals maintain homeostasis?

Answer 5

For example, dogs and birds maintain homeostasis by sticking their tongues out this helps cool them down when they get to warm.
Elephants maintain homeostasis by flapping their big ears which can reduce the temperature.

Question 6

How does a leaf maintain homeostasis?

Answer 6

Leaves maintain homeostasis by the stomata which allow carbon dioxide to enter while water and oxygen exit through

Question 7

What is thermoregulation?

Answer 7

Thermoregulation is a process that allows your body to maintain its core internal temperature.

Question 8

What is an endotherm

Answer 8

endotherms are able to live in more extreme environments and need lots of food

Question 9

what is an ectotherm

Answer 9

ectotherms eat less they are able to live in very cold and hot environments but they try to avoid heat since their metabolism is temperature dependant.

Question 10

What is osmoregulation

Answer 10

osmoregulation is done through humans and mammals through the kidney filtering out the salt and water from the blood and getting rid of excess urine.
plants do it as well.

Question 11

What is the hierarchy of life

Answer 11

cell - the basic unit of life.
tissue - specialized that works for a particular function.
organ - made up of diff tissues that have a function.
organ system - carry out specific functions.
organisms - carries out all functions of life.

Question 12

what are the 7 functions of life in an organism

Answer 12

Metabolism - dogs have a higher metabolism than humans they breathe and pump blood faster.
homeostasis - dogs maintain homeostasis by sticking their tongues out to cool them down.
Growth - small dog breeds stop growing however big got breeds to tend to keep growing until they are 12 - 24 months old.
nutrition - proteins and fats, carbohydrates are one of the three major nutrients in food and a major source of energy for a dog’s body.
Excretion - dogs get rid of waste and toxins by being physically active moving around.

Question 13

The structure of the respiratory system

Answer 13

• It is a way for oxygen to enter and carbon dioxide to exit.

Question 14

Key organs

Answer 14

nasal cavity
larynx
trachea
lungs
bronchi
bronchioles
alveoli 
intercostal
diaphragm

Question 15

Key muscles

Answer 15

diaphragm

intercostal which are able to inc and dec the size of the thoracic activity.

Question 16

emphysema

Answer 16

emphysema is a slowly progressing disease which turns healthy alveoli into an irregular structure with large holes those holes cause shortness of breath because those holes lose the gas exchange

Question 17

lung cancer

Answer 17

causes cells to divide in the lung and reduces an individual’s ability to breath, it is prone to spread in a person’s brain, bone, and liver.

• the lung tissue will no longer be functional and will no longer do gas exchange
• lung cancer is mainly caused by tobacco, pollution, and genetics.

Question 18

respiration in different animals

Answer 18

• insects have structures called spiracles for gas exchange.
• spiders have book lungs.
• terrestrial animals have lungs similar to our own.

Question 19

similarities between human and fish respiratory system.

Answer 19

• both humans and fishes breathe through lungs(gills) where oxygen enters and carbon dioxide exits.

Question 20

differences between human and fish respiratory system.

Answer 20

• the fish’s gills are placed on the back of the mouth where humans have their lungs placed in the upper body.