Negative feedback in males
Hypothalamus controls testes by secreting GnRH
GnRH triggers anterior pituitary to produce FSH & LH
FSH promotes spermatogenesis (it will take up more testerone
and enhance sperm production)
Sertoli cells release inhibin. (
Refraction of Light
Purpose: To observe light refracting through different materials
Caution: Be careful not to spill any water
Diagrams: Please see back of this
The Integumentary System
The Integumentary system makes up 12- 15% of the weight of the body and is
also the largest organ (1-2 meters) consisting of skin, hair, nails, sweat glands, and their
products. Its primary job is to protect and tell the animal ab
Behavioural characteristics of light: Reflection and Refraction
The two most observable behavioural characteristics of light are reflection and refraction. This
hub attempts to investigate reflection and refraction of light, and its application in everyda
Anything that is, or has ever been, alive. Examples of biotic factors in an environment include
organisms, organic molecules, and cells. Biotic is the opposite of abiotic.
An organism that only eats animal tissue. Most preda
How Periscopes Work
When we look through a periscope, light passes into our eyes by entering through
the viewing hole of the periscope (the side we look out of in a periscope), reflecting off
one mirror to the other mirror, and from the
Celiac Sprue Cause and Description
Celiac Sprue, also known as celiac disease, is a condition in the small intestine
caused by an immunological reaction to gluten (proteins found in wheat) which in turn,
causes destruction in the inner lining of the small
Purpose: To observe the path of light and an inverted image
Paper with pinhole
Caution: Be careful while using a lighter and candle
Diagram: Please see back of this lab report
Question: Explain why you see what
Science Binocular Project
How do binoculars work?
Porro prisms binocularsthe person who uses it will look through the eyepiece; reach
one piece of the prisms. Then reflect at 45 to the other piece of the prisms and go
straight into the objective. Although
Artificial/Alternate Ways of Human Reproduction
Complications can arise at all stages of the human reproductive cycle
Reproductive technologies are changing the ways babies are born and
shaping laws that determine parenthood and
C1. Bodies of rock may slip either vertically or horizontally on a fault (see
a) Which of these types of faults do you think is most likely to produce a
tsunami? Explain your answer.
b) The San Andreas Fault is a horizontal slip f
Notes for Chapter 4 (Science)
A chemical energy the energy that is stored in chemical compounds.
The energy of carbohydrates and proteins are gradually released by taking part in
reaction in our body.
An exothermic reaction is a chemical react
Proteins are large organic compounds made of amino acids arranged in a
linear chain and joined together by peptide bonds between the carboxyl and
amino groups of adjacent amino acid residues. The sequence of amino acids
in a protein is defined by
Notes for Chapter 2 (Science)
Matter is everything that had mass and volume.
Matter can be easily classified by their properties and characteristics.
Properties are ways of describing thing so that we can identify them.
Mixture and compound contains t
What are Pulsars?
A rapidly spinning object
in outer space sending
out bursts of radio waves
at regular intervals
Comes from high-mass
stars that have selfdestructed
Neutron star in the center
Founding of Pulsars
Thousands of Pulsars
Notes for Chapter 3 (Science)
v Matter is made up of small particles called atoms.
v There are about 109 elements.
v Properties of metal:
Ductile. (can be pull or stretch into wires)
Malleable. (cam be beaten into sheet)
15.1 Chapter 15 Assignment # 1
Chapter 15 Exploring the Universe
Section 15.1 Changing Ideas about the Universe
1. The name of the galaxy on page 318 is called Andromeda Galaxy. It has
about 100 billions stars in it.
2. The 2 questions that people have be
Digestion Study Guide
1. a) Digestion is the physical and chemical processes that reduce food to
small soluble molecules that can be absorbed.
b) Digestion is the reducing of the food sizes in order to increase surface
area; absorption is the process of t
1. a) A technique for investigating acquiring new knowledge, or correcting and integrating previous
b) It is important, because scientific methods are known by scientists around the globe and all of
the can support or refuted the theory that wa
Science 10 Genetic Disorders in Fetuses
Certain diseases are caused by mutated genes
Scientists have identified genes when mutated that can cause
- Cystic fibrosis (build-up of mucus in lungs, difficult breathing, childhood