 | Term | Definition |
| |
heterozygous |
a genotype that has two different alleles |
| |
sacromere |
the unit of contraction in the muscular system |
| |
number of layers of skin |
3 |
| |
keratin |
what hair and nails are made of |
| |
adrenaline |
the hormone that helps the body prepare for stress |
| |
synapse |
space between two neurons |
| |
neurotransmitter |
chemical that axon end secretes to control another neuron or an effector |
| |
The 3 main regions of the brain |
cerebrum, cerebellum, and brain stem |
| |
what holds bones together at joints |
ligaments |
| |
exchange of oxygen and carbon dioxide occurs in the ___ of the lungs |
alveoli |
| |
What is the main function of the excretory system? |
to remove waste products |
| |
genotype |
the genetic makeup of an individual |
| |
blood pressure |
the force that the blood exerts on the vessels of the body |
| |
atria |
where the blood enters the heart |
| |
Antidiuretic hormone |
stimulates the reabsorption of water in a nephron |
| |
pacemaker |
sets the heart beat rate |
| |
epidermis |
the outer layer of skin |
| |
retina |
the layer of nerve tissue at the back of the eye made up of cells that respond to light energy |
| |
hypothalamus |
monitors body temperature and responds as necessary to maintain homeostasis |
| |
neuron |
the basic unit of structure and function in the nervous system |
| |
testes |
produces sperm |
| |
lens |
a solid structure that focuses light on the back of the eyes |
| |
bile |
a chemical that breaks down fats into small droplets |
| |
glucagon |
stimulates the liver to release glucose into the blood when glucose levels are low |
| |
antibodies destroy anitgens by causing pathogens to |
clump together |
| |
reflex |
an automatic response to a stimulus |
| |
a snail-shaped structure in the inner ear that is filled with fluid, lined with hair cells, and connected to the auditory nerve |
cochlea |
| |
breathing is controlled by the chemistry of your blood as it interacts with the __ |
medulla oblongota |
| |
arteries |
large, elastic vessels that carry blood away from the heart |
| |
pepsin |
the enzyme that begins the digestion of proteins |
| |
absorbs water from the indigestible materials in the digestive tract |
large intestine |
| |
tendons |
attach muscles to the skeleton |
| |
Where fetal developement takes place |
uterus |
| |
scrotum |
the muscular sac that surrounds the testes |
| |
zygote |
combination of sperm and egg nuclei |
| |
an inorganic substance that serves as a building material or takes part in a chemical reaction in the body |
minerals |
| |
Gastric Juices are produced in the ___ |
stomach |
| |
esophagus |
muscular tube that connects the mouth to the stomach |
