Exam 27: Nervous, Sensory, and Locomotor Systems

Muscles are connected to bones by ________.

What cushions structures of the central nervous system, helps supply them with nutrients and hormones, and carries away wastes?

Scenario The human eye is an incredible organ capable of gathering light to focus on images near and far, in bright light or dim, and with quick adjustments between these extremes. However, eyes can develop problems, such as floaters, which are small particles that interfere with the transmission of light between the lens and the retina, and bloodshot eyes, which occur when irritants such as dust or smoke get in the eye. -If floaters are small particles that interfere with the transmission of light between the lens and the retina, they must be located in the ________.

Scenario Huntington's disease is a genetic disorder in which a gene mutation causes the production of an abnormal protein that damages cells in the brain. Symptoms typically begin with changes in personality, and reasoning. Uncoordinated and uncontrolled movements develop, such that physical abilities become limited. -Scientists hypothesize that the abnormal protein stops vesicles from moving through the cytoskeleton. Predict the effect of this protein on the nervous system.

Which cells protect, insulate, and reinforce neurons?

Scenario The human eye is an incredible organ capable of gathering light to focus on images near and far, in bright light or dim, and with quick adjustments between these extremes. However, eyes can develop problems, such as floaters, which are small particles that interfere with the transmission of light between the lens and the retina, and bloodshot eyes, which occur when irritants such as dust or smoke get in the eye. -When light levels suddenly increase, our eyes adjust quickly by reducing the size of the ________.

The ________ is the control center of the nervous system.

You are out for a walk and start to trip, but you keep your balance and don't fall. Which brain region is responsible for the rapid coordination of muscle activity that kept you from falling?

The receptor potential is the ________.

Where would we expect to find electrical synapses?

What causes action potentials to be generated?

Scenario The human eye is an incredible organ capable of gathering light to focus on images near and far, in bright light or dim, and with quick adjustments between these extremes. However, eyes can develop problems, such as floaters, which are small particles that interfere with the transmission of light between the lens and the retina, and bloodshot eyes, which occur when irritants such as dust or smoke get in the eye. -Eyes can become bloodshot when irritants in the eye trigger an increased blood flow to the connective tissue covering the eye. These swollen blood vessels are located on the ________.

According to the sliding-filament model of muscle contraction, a sarcomere contracts when its ________.

Functionally, what is the muscle fiber's fundamental unit of contraction?

A thick filament is made up of ________.

A neuron can relay a more intense signal by ________.

The movement of an action potential along a neuron is most like ________.

A person who has blurred vision caused by a misshapen lens or cornea has ________.

A person whose eyeball is shorter than normal suffers from ________.

The figure shows the structure of the humerus, a bone found in your upper arm. Which part of a bone contains stores fat?