Level 1
Which system is responsible for transferring the genetic code from one generation to another?
reproductive system
The brain, spinal cord and spinal and cranial nerves make up the:
central nervous system
A whitish fiber or bundle of fibers held together by connective tissue is the description of:
nerves
The cranial nerve responsible for transmitting facial sensations to the brain is the:
trifacial
The posterior auricular, temporal and zygomatic are all branches of which nerve?
facial
Motor nerves carry messages from the brain to the muscles and are called
efferent
All voluntary body action is controlled by which systems?
central nervous system
Sensory nerves carry messages to the brain and:
spinal cord
Which of the following terms is the main nerve branch to the top one-third of the face?
ophthalmic
The primary function of the excretory system is to:
eliminate waste products from the body
Which crucial part of the central nervous system is composed of long nerve fibers and originates in the base of the brain and extends to the base of the spine?
spinal cord
The average human brain weighs between:
45 and 49 ounces
Sensory nerve endings are referred to as:
receptors
Which nerve extends to the lower eyelid, side of the nose, upper lip and mouth?
infraorbital
Hair growth, skin conditions and energy levels are all controlled by the:
endocrine system
What system coordinates and controls the operation of the human body?
nervous system
How many pairs of spinal nerves does the spinal cord hold that branch out to muscles, internal organs and skin?
31
Efferent nerves carry messages from the brain to the muscles and are also called:
motor nerves
The main nerve branch of the lower third of the face is called the:
mandibular branch
What is the muscular organ that separates the chest cavity from the abdomen when breathing?
diaphragm
The nervous system is made up of the central nervous system, the peripheral nervous system and the:
autonomic nervous system
What system is composed of sensory and motor nerves that extend from the brain and spinal cord to other parts of the body?
peripheral nervous system
A reflex action is an interaction with:
sensory and motor nerves
The primary motor nerve of the face is the:
facial nerve
Why is breathing through the nose healthier than breathing through the mouth?
nose contains mucus membranes that filter out dust and dirt