7th grade mrs. paskel sceince final flash cards

What are the products of photosynthesis?

Oxygen and sugar

How does photosynthesis benefit heterotrophs?

It creates food they can eat

What happens during respiration?

Glucose is broken down releasing energy

What happens during the stage of mitosis?

The cells nuclei divides into two new nuclei

How does carbon dioxide enter plants?

Through stomata in leaves

During what stage of the cell cycle does replication occur?

interphase

Under what conditions is Lactic acid fermentation occur?

A very fast run

What is the regular cycle of growth and division the cells undergo?

The cell cycle

What forms around the chromatids during mitosis?

Two new nuclei

What is copied during replication?

The cells DNA

What are small openings called that allow carbon dioxide to enter a leaf?

Stomata

Where does the energy come from that allows plants to make their own food?

Sun

Almost all living things depend on which process to supply them with energy they need?

Photosynthesis

A cell’s nucleus divides to form two identical nuclei during what’s stage of the cell cycle

Mitosis

What is the final stage of the cell cycle?

Cytokenesis

What is produced when plants go through photosynthesis

Oxygen

What two things are kept fairly constant in the atmosphere during to photosynthesis and respiration?

Carbon dioxide

The raw materials for respiration are the same as the end products of which process?

Photosynthesis

What takes place when muscle cells run low on oxygen

Lactic acid

What stage of the cell cycle is DNA copied?

Interphase

What happens during respiration?

Glucose is broken down to produce carbon dioxide

What forms around the chromatids during mitosis?

Nuclear envelope

What chemical products does the endocrine system use to act on the body?

Hormones

What is the process called when a mature egg is released from the an ovary?

Ovulation

What process does an egg develop in an ovary while the uterus prepares for the possible arrival of a fertilized egg?

The menstrual cycle

What body system is often compared to a heating system that turns on and off on its own?

The endocrine system

What age range is infancy

Birth to age 2

Where is sperm produced in the male body?

Testes

Where does a fertilized egg develop after it leaves the fallopian tube?

In the uterus

Which endocrine gland communicates with the hypothalamus to control many body activities, including growth?

Pituitary gland

What is the correct order of the first stage of human development?

Zygote, embryo, fetus

Why do hormones cause changes only in certain body organs?

A hormone interacts only with target cells which it together with that hormone

During the menstrual cycle, what structure builds up extra blood and tissue to prepare for a fertilized egg?

The uterus

What is the stage called when the baby is pushed out of the uterus during birth?

Delivery

What stage of development does a human usually start walking?

Infancy

What type of cells are produced in the ovaries?

Female sex cell-eggs

How do identical twins develop?

One egg splits into 2

What is the monthly cycle of changes in the female reproductive system called?

Menstrual cycle

What is a developing human during the first eight weeks after the two-celled stage called?

Embryo

What arms the chemical messengers produced by the organs of the endocrine system called?

Hormones

What happens during labor?

Muscle contractions from the uterus

What is one typical social change that occurs during adolescence?

Individuals take on adult responsibilities

What is another name for a heterotroph

Consumer

Describe how the products of photosynthesis are used for energy by both plants and animals

Plants provide food for organisms; plants got energy from suc

Which energy releasing process does not require oxygen?

Fermentation

What is the powerhouse of the cell?

Mitochondria

The formation of a cell plate is a characteristic of what process?

Cytokinesis in plants

What is the correct order of mitosis?

Prophase, metaphase, anaphase, telophase

How are chromatuds held together

By a centromere

What are the rode like parts that make up a chromosome?

chromatids

Which system regulates short and long term activities by sending signals throughout the body?

Endocrine system

What is the chemical product of an endocrine gland called?

Hormones

What happens when the amount of a hormone in the blood reaches a certain level?

It stops producing it

What type of cells are specialized in a way that enables them to recognize the hormone’s chemical structure

Target cells

What is fertilization?

The joining of an egg cell don a sperm cell

What is the mixture of sperm and fluids called?

Semen

What is the difference between testosterone and estrogen?

Testosterone is produced in males and estrogen in females

What process involves the production of eggs by the female and sperm by the male?

Sexual reproduction

What are the organs of the female reproductive system?

Ovaries, fallopian tube, uterus, vagina

How often does an egg develop and become released in a mature woman?

About once a month

What happens to muscle strength as people age?

It decreases

At what age do girls and boys enter puberty?

Between 9-15

What is adolescent?

A time when you gradually increase your ability to think critically, and your bodies undergo specific physical changes

What system carries messages back and forth between the brain and other part of the body?

Nervous system

What is the function of the digestive system?

Breaking down food so the body can use it

What are some long term effects of stress?

Homeostasis is affected

What is a structure called that is composed of many different tinks of tissue?

An organ

How do muscles, bones, and nerves word together?

Make your body move

Which structure directs the activities of the cell?

Nucleus

What part of the body is where 2 bones come together?

A joint

What is a function of your circulatory system?

Transports oxygen

How can homeostasis be upset?

Stresss

What is a stimulus and how does your body react to it?

Something that disrupts homeostasis to which your body responds

How can homeostasis be kept stable?

Managing stress, eating when hungry, drinking when thirsty

What is a nutrient?

A substance that you get from food and that your body needs

What is connective tissue?

A tissue that protects your organs and different body parts

What type of tissue has the ability to contract

Muscle

What are your skin, ears, and kidneys examples of?

Organs

What tissue is your skin made up of?

Epithelial

Which system removes waste from your body?

Excretory

Which is the least complex level of organization in the human body?

Cell

Which 2 systems control body functions?

Nervous and endocrine systems

What system does the circulatory system work with to get nutrients to all body cell?

Digestive

What are some good ways to manage stress vs. bad what’s to?

Get enough sleep, eat healthy, exercise vs. spend time alone

What is the body’s response to the stimulus of getting overheated?

Sweating

Which body part helps you keep your body balanced?

Ears

How can high levels and long periods of stress affect a persons immune system?

Increases the risk for disease

What is the body’s response to the need of energy?

Eating food

How does sweat help to cool the body?

Sweat glands release