Organisation of the Human Body - Week 1 Flashcards
an atom that loses an electron becomes _________ charged
positively
an atom that gains an electron becomes _________ charged
negatively
An atom that has lost or gained one or more electrons
ion
a positively charged ion is called an?
cation / cat-ion
a negatively charged ion is called an?
anion / an-ion
disulfide bonds are covalent bonds formed between 2 atoms of _________
sulfur
T or F
an organ system is made up of all the organs that are involved in that system
T
These 7 organs
mouth, esophagus, stomach, small intestines, large intestines, liver, pancreas
make up which organ system?
Digestive system
the smallest part of an element is an?
atom
atoms are made up of protons, neutrons and ________?
electrons
atoms are made up of protons, ________ and electrons?
neutrons
atoms are made up of ________, neutrons and electrons?
protons
Atoms are made up of what three subatomic particles?
Protons, neutrons and electrons
a proton has a ________ electrical charge
positive
a electron has a ________ electrical charge
negative
a neutron has a ________ electrical charge
neutral
the nucleus of an atom contains?
proton, neutron
The outer shell of an atom contains the?
Electrons
what dictates the atomic number of an element?
the number of protons in the nucleus
what is the octet rule?
An atom ideally wants eight electrons in its outer shell to make it stable
T or F
atoms can gain, lose or share electrons
T
___________ make up all matter and are made up of 1 type of atom
Elements
What type of bond is a force or attraction between positive and negative electrical charges that keep two or more atoms closely associated with each other to form a molecule
Chemical bond
What bond involves the loss or gain of one or more electrons by one atom
Ionic bond
what type of bond sees the sharing of electrons between atoms
Covalent bond
What type of bond is an attractive force between polar molecules, that sees the sharing of it’s one electron in a covalent bond with another atom
Hydrogen bond
what are the 4 major groups of organic compounds
carbohydrates
lipids
proteins
nucleic acids
Organic compounds contain covalently bonded hydrogen and _________?
Carbon
what is the primary function of carbohydrates?
source of energy
What is a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer?
A macromolecule
What is an electrically neutral group of two or more atoms held together by chemical bonds
A molecule
what is the subcellular structure that has one or more specific jobs to perform in the cell
Examples:
Nuclei: store genetic information
Mitochondria: produce chemical energy
Ribosomes: assemble proteins
Organelle
What are the basic building blocks of all living things, that provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. They have many parts, each with a different function
Cell
groups of cells that have a similar structure and act together to perform a specific function
Tissues
what are the 4 types of tissues?
connective, muscle, nervous, and epithelial
lactation is an example of _________ feedback
positive
Blood glucose regulation is an example of _________ feedback
Negative
Body temperature control is an example of _________ feedback
Negative
Blood clotting is an example of _________ feedback
Positive