Coordinating Systems and Food Chain Flashcards
(11 cards)
What are two coordinating systems in our bodies? How do they coordinate?
The nervous and endocrine system. The nervous system controls quick, involuntary movements, or reflexes. The endocrine system controls the slow, internal actions of the body.
What are the six parts of a neuron, and what are their functions?
Cell Body: To protect the nucleus. Nucleus: To control the neuron. Axon: To send messages down to the axon tips. Myelin: To insulate the axon. Axon Tips: To send messages to the next neuron. Dendrites: To receive messages from previous neurons.
What are three structures that protect the brain and spinal cord?
Bones, Membranes, and Fluid.
What is the purpose of a reflex?
Protection.
What are the three major sections of the ear, and the other major parts of the ear?
The three sections are the Outer, Middle, and Inner Ear. The major parts are the ear, ear canal, eardrum, cochlea, stirrup, Auditory Nerve, Semicircular Canals, and Eustachian Tube.
What are the four main parts of the brain, and what are their functions?
Cerebrum: To help with the five senses. Cerebellum: To help keep posture and balance. Brain Stem: Vital Actions. Spinal Cord: To take messages to and from the brain.
What are the major parts of the eye?
Lens, Pupil, Cornea, Retina, Optic Nerve, Iris.
What are the functions of tears? Cornea? Lens? Optic Nerve? Retina (Rods and Cones)? Cochlea? Auditory Nerve? Eustachian Tube?
Tears: To cleanse the eye. Cochlea: To help focus the eye, and let light into the eye. Lens: To focus light into the eye. Optic Nerve: To send images from the eyes to the brain. Retina: To let light into the eyes. Rods and Cones: To produce the image UPSIDE-DOWN. Rods notice black and white, Cones, colors. Cochlea: To receive vibrations from within the ear, and send sensory neurons to the brain. Auditory Nerve: To send sensory neurons to the brain from cochlea. Eustachian Tube: Equalize pressure between the outer and inner ear.
What happens when the amount of light outside changes? Why does it happen? How is this a reflex?
The retina enlarges or shrinks. To let more light or less light into the eye. This is a reflex because it is involuntary.
Why would an animal at the top of a food chain receive more mercury in its body than the animal at the bottom of the chain?
Because within eating the lesser animals, more mercury built up inside the fat.
Why is standing more tiring than walking?
Because when standing still, the blood has a hard time going down to the feet and back up again. When walking, the distance decreases, making it easier for blood to return to the heart.
