nervous system
the master controlling and communicating system of the body
sensory imput
gathered information
integration
the nervous system processes and interprets sensory input and decides what should be done at each moment
motor output
nervous system causes a response called motor output by activating effector organs - the muscles and glands
effector organs
(Glandular or Muscle) receive or respond to Autonomic Nervous System (ANS) signals. Cardiac and smooth muscle, glandular tissue. Ex: Adrenal, Medulla
central nervous system consists of what
the brain and the spinal cord
peripheral nervouse system consists of
nerves (bundles of axons)
spinal nerves do what
carry imipulses to and from the spinal cord
cranial nerves do what
carry impulses to and from the brain
What part of the eye is called "the white of the eye"? Is it A) the sclera or B) the choroid?
the sclera. This opaque outer layer appears white due to the presence of collagen fibers.
which layer is the retina found? Is it the A) uvea or B) neural layer?
the neural layer. The retina contains the neural cells whereas the uvea contains the iris
Which iris color has more melanin? Is it A) green or B) blue?
A) green. Color variation is due to concentration and distribution of melanocytes. Blue has the least amount of melanin.
What are the protein fibers called that make up the lens? Are they A) collagens or B) crystallins?
crystallins. Collagen is important in the connective tissues and cornea. Crystallins appear in a precisely packed pattern in the lens.
What do we call the gel-like substance in the posterior chamber of the eyeball? Is it A) the aqueous humor or B) the vitreous body?
B) the vitreous body. The aqueous humor is the fluid in the anterior chamber.
Which photoreceptor cells are responsible for sharp vision? Is it A) the rods or B) the cones?
B) the cones. The cones are stimulated by color and intense light.
Which neural cells regulate action potential generation in the eye? Is it A) the ganglion cells or B) the bipolar cells?
the bipolar cells. They regulate action potentials of the ganglion cells based on stimulation of the rods and cones