Science: Chapter 5
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What is a cell?
The cell is the basic unit of life.
What are the three main cell structures and what are their functions?
- Nucleus: Center of control
- Cell Membrane: Controls what goes in/out and protects cell
- Cytoplasm: Creates hospitable environment for most cell activity
What three cell components are visible under an optical microscope?
- -Cell Membrane
What is DNA?
DNA is a reproductive molecule, shaped like a double helix, locate inside the cell nucleus.
DNA is made up of two chains linked by tiny molecules called: _____________?
What is a genome?
A genome is the complete set of genetic information of an individual or a species.
What is a gene?
A gene is a segment of DNA that contains the genetic information required to carry out a particular job.
Name to factors that can increase the genetic diversity of a species?
- -Sexual Reproduction
- -Large Population
Why do we need cells to divide?
- -Tissue Repair
- -Sexual Reproduction
What is mitosis?
Mitosis is a process of cell division in which cells divide in order to ensure growth and tissue repair.
What is meiosis?
A process of cell division in which male and female gametes are produced in order for sexual reproduction to take place.
What are the phases of mitosis (PMAT)?
- 1. Prophase
- 2. Metaphase
- 3. Anaphase
- 4. Telophase
What is the function of the nuclear membrane?
- -forms a barrier to protect the nucleus
- -enables certain exchanges with the rest of the cell
What cell organelle protects the nucleus?
What is the function of the Golgi apparatus?
-stores material produced by the cell and transports it to the cell membrane and outside the cell.
What cell organelle stores material produced by the cell and transports it to the cell membrane?
What is the function of the endoplasmic reticulum?
- -Produces some of the material necessary for cell activities.
- -Transports material from one part of the cell to another.
What cell organelle transports material from one part of the cell to another?
What is the function of the ribosomes?
-produces some of the material necessary for cell activities.
What cell organelle produces some of the material necessary for cell activities?
What is the function of the cytosol?
-contains cytoplasmic organelles and many dissolved substances.
What cell organelle contains cytoplasmic organelles and many dissolved substances?
What is the function of lysosomes?
- -digest certain nutrients.
- -decompose and recycle various cell constituents.
What cell organelle digests certain nutrients and decomposes and recycles various cell constituents?
What is the function of mitochondria?
-produce energy through cellular respiration.
What is the cell organelle that produces energy through cellular respiration?
What is the function of the nucleolus?
-turns DNA into RNA
What cell organelle turns DNA into RNA?
What is the function of vacuoles?
-stores water, minerals, nutrients
What cell organelle stores water, minerals and nutrients?
What are the three types of muscle tissue and where do we find them?
- -skeletal: attached to the bone
- -smooth: inside of us
- -cardiac: in the heart
What are the two cycles in the female reproductive system?
- -Ovarian Cycle
- -Menstrual Cycle
The ovarian cycle has to do with: _________?
The menstrual cycle has to do with: _________?
- ovarian: releasing eggs
- menstrual: preparing the uterus for implantation of the zygote.
What are the four types of tissues and what do each of them do?
- a) epithelial: covers and protects organs.
- b) nerve: control and guide body activity
- c) muscle: to move
- d) connective: binds and supports organs
Mitosis creates 2 ________ cells?
Meiosis creates 4 ____________ cells?
GO AND STUDY THE PHASES OF MITOSIS
GO AND STUDY THE MEIOSIS DIAGRAM
What is a tissue?
A tissue is a group of similar cells that have a common structure and function.
What is an organ?
An organ is a structure composed of two or more tissue types performing one or more specific functions.
What is a system?
A system is a group of organs and tissues working together to accomplish a common function.
What are three secondary examples of male and female puberty?
- -underarm hair appears
- -genital hair appears
- -goes through psychological changes
What is are the primary sexual characteristics of a female?
- -menstrual cycle begins
- -genital organs mature
What is are the primary sexual characteristics of a male?
-genital organs appear
GO AND STUDY THE CYCLES!!!
What would you like to do?
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