GR 7 Science Q1 Exam

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Organism

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74 Terms

1

Organism

a living thing made up of one or more cells that can perform all the processes needed for life.

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2

Unicellular

organism made up a single cell

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3

Multicellular

Organisms made up of more than one cell

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4

The cells that make up a multicellular

Organisms are specialized and organized to perform specific functions

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5

Multicellular organisms

have more than one level of organization. Ex. oak trees

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6

A tissue

is a group of similar cells that are organized to perform a specific function

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7

Vascular tissue

cells connect together to form a tissue called

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8

Organ

different types of tissues that function together form a

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9

Example of an organ

stem of oak tree

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10

Blood vessels

are organs in the shrew made up of epithelial tissue that controls the passage of blood cells, layers of smooth muscle tissue that control the diameter of the vessel and a tough wall of connective tissue

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11

Organ system

is a group of organs that work together to perform body functions

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12

An organism

can have many organ systems that work together to perform all the functions the organism needs to survive

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13

All organisms are made up of

cells

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14

A tissue

has characteristics similar to the cell type with which it is made

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15

The structure of an organ relates to

the function it performs

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16

Most organisms

have organ systems that perform specialized functions

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17

a respiratory system

is an animal organ system that takes in oxygen and releases carbon dioxide

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18

Organisms need to process

nutrients and take in oxygen

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19

The coordination of systems gives an organism a greater variety of poosible

functions and responses

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20

Average heartbeat for ages 11-14 years old

50-100 BPM

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21

Artery

a blood vessel that carries blood from the heart to the body, largest of the blood vessels, rich in oxygen and nutrients, carry materials the cells need

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22

Vein

carries blood back to the heart, medium sized

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23

White blood cell

fight disease and infection, destroys harmful germs in the body, largest of the blood cells

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24

Red blood cells

contain hemoglobin that give it the red color, most numerous, carry oxygen to all parts of the body, picks up carbon dioxide waste from the cells

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25

Respiratory system

the system for taking in oxygen and giving off carbon dioxide

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26

3 types of muscle tissue

  1. Skeletal

  2. Cardiac

  3. Smooth

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27

voluntary

Skeletal muscle

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28

Involuntary

Smooth muscle and Cardiac muscle

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29

The skeletal system

supports the body and gives it shape; protects the internal organs, such as lungs and brain; stores calcium and other minerals

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30

The brain

is the control center of the nervous system

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31

The brain is divided into 3 main parts

  1. cerebrum

  2. cerebellum

  3. medulla

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32

The spinal cord

Helps carry messages or signals back and forth between your brain and body' conducts sensory information from the peripheral nervous system and conducts information from the brain to various muscle groups and glands

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33

The central nervous system

regulates the activities of the body

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34

Nerves

are made of specialized cells called neurons that carry messages from one part of the body to the other using electrical signals

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35

The digestive system's function

to turn food into nutrients the body can use for energy and to grow

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36

Mechanical digestion

breaking down food with muscles or teeth

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37

Chemical digestion

breaking down food with acids or enzymes

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38

Mouth

Food is broken into smaller pieces by teeth and saliva

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39

Esophagus

Food passes through here to go to the stomach

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40

Stomach

Mechanical and chemical digestion also takes place here to further break down food; giant muscle that squeezes and churns the food, helping to break it down

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small intestine

most digestion takes place here, food can stay for up to 4 hours, anything not digested becomes solid waste

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large intestine

food that is here is solid waste; is stored here until the body is ready to eliminate it; this entire process takes 6-8 hours

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43

Food is eliminated through the

Anus

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44

Excretory system

The main function is to filter blood and remove liquid waste from the body; works with the circulatory, respiratory, endocrine and integumentary systems to maintain the homeostasis of water, ions, pH, blood pressure, calcium, and red blood cells in the body

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45

Kidney

Main function is to filter waste products out of the blood passing through them; works in part with endocrine system in the formation of red blood cells, and the circulatory system to remove waste from blood

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46

Bladder

Pear shaped organ that holds urine to allow for urination to be infrequent and voluntary; capacity 400-600 mL;

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Detrusor

Emptying the bladder takes place by contraction of smooth muscles

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48

The Endocrine system

a collection of glands that produce and secrete hormones

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49

Function of the endocrine system

to maintain the correct chemical level in the body through feedback

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50

Endocrine system

regulates mood, sleep, growth and development, metabolism, sexual function and reproduction processes

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Hormones

Chemical messengers that communicate information from one set of cells to another; many different hormones move through the bloodstream; each type of hormone is designed to affect only certain cells

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Homeostasis

The endocrine system works to maintain stable internal conditions(balance); uses negative and positive feedback mechanisms

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53

Pancreas

located in the upper abdomen; Secretes the hormones insulin (lowers) and glucagon(raises) to control blood sugar levels throughout the day

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54

Reproductive glands

Influence sexual development; ovary (female) produces hormone estrogen; testicle (male) produces hormone testerone

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55

Plant bodies respond to a variety of __

environmental factors

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56

Plants regulate water in their bodies mostly by

Opening and closing their stomata

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57

Stomata open to allow ___ to move in and ___

air; out

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58

Some plant leaves have a ___ coating that helps prevent water ___

waxy; loss

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59

One way plants respond to their environment

by growing toward a light source

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60

Phototropism

plant growing toward a light source

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61

A skeleton can be ___

external; like the exoskeleton of insects

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62

Animals use a variety of structures to __

gather information from the environment

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63

behavior

the set of actions taken by an organism in response to stimuli; animals form ___ to survive

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64

Innate behaviors

behaviors that do not require learning or experience

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Learned behaviors

behaviors developed through memories and experience and from observing the actions of other animals

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66

Memory

information can be stored in the brain as __; allows an animal to respond to its environment more efficiently

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67

energy for living things comes from___

food

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68

energy in food comes from the ___

the sun

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69

autotrophs

organisms that use light energy from the sun to produce food

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70

heterotrophs

organisms that cannot use the sun's energy to make food

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71

Male frogs normally have ___ on their front feet

thickened pads

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72

Frogs can also breath throught their ___

skin

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73

a frogs skeleton provides__, __, and ___

structure, support, protection

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74

frogs have specialized sensory organs to allow them to __ and __

detect prey and avoid predators

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