Aphy 101 Final Solutions 100%

APHY 101 Final SOLUTIONS 100% Neurons that conduct impulses from the CNS to muscles or glands are - ANSWER motor neurons. Which cells produce myelin in the brain and spinal cord? - ANSWER Oligodendrocytes Every neuron has - ANSWER a cell body. If a resting potential becomes more negative, the membrane is - ANSWER hyperpolarized. Which of the following neuroglia are not part of the CNS? - ANSWER Satellite cells Three general functions of the nervous system are - ANSWER integrative, motor, and sensory. The brain and spinal cord comprise the central nervous system. - ANSWER True The most rapid conduction of an impulse along an axon occurs on a fiber that is - ANSWER thick and myelinated. During the absolute refractory period, a stimulus of high intensity may trigger a nerve impulse. - ANSWER False The neurotransmitter that controls skeletal muscle contraction is - ANSWER acetylcholine. Because the response of a nerve fiber is all-or-none, a greater intensity of stimulus does not produce a stronger impulse. - ANSWER True Most of the neurons in the brain and spinal cord are - ANSWER multipolar. Action potentials are related to impulses conducted along an axon in that - ANSWER propagation of a series of action potentials along a nerve cell fiber constitutes an impulse. The simplest level of CNS function is the - ANSWER spinal reflex. The ___________ separates the cerebrum from the cerebellum. - ANSWER transverse fissure Gray matter of the spinal cord is mostly composed of - ANSWER interneurons. Over a lifetime, the brain shrinks by about ___ percent. - ANSWER 10 The meninges consist of - ANSWER the pia mater, arachnoid mater, and dura mater. Which lobe of your brain are you using when you answer this question? - ANSWER Frontal The ____________ is the thin meninx attached to the surface of the brain, containing many nerves and blood vessels. - ANSWER pia mater The part of the brain that coordinates voluntary muscular movements is the - ANSWER cerebellum. Cerebrospinal fluid - ANSWER all of the above. The part of the brain that assigns value to a memory is the - ANSWER amygdala. The dura mater is the outermost layer of the meninges. - ANSWER True Symptoms of concussion include all except - ANSWER decreased sensitivity to light and sound. Sensory receptors include - ANSWER all of the above. Which of the following is part of the inner tunic of the eye? - ANSWER Retina Movement of hair cells in the semicircular canals signals - ANSWER the direction of motion. Rods are more sensitive to light than cones, but cones are important for color vision. - ANSWER True Tears contain an enzyme that reduces the risk of eye infection. - ANSWER True Bitter receptors sense - ANSWER acids. Temperature senses use two types of - ANSWER free nerve endings. The ability to ignore your socks around your ankles demonstrates - ANSWER sensory adaptation. Rhodopsin is found in ____ cells - ANSWER rod The hearing receptors are most closely associated with the - ANSWER spiral organ. Stretching of tissues can cause pain sensations to arise from visceral organs. - ANSWER True Floaters are bowel movements that float due to a fatty diet. - ANSWER False The hard palate is composed of the - ANSWER maxillary and palatine bones. In a push-up, the elbow joint flexes as the person lowers. - ANSWER True The capitulum and trochlea are located - ANSWER at the distal end of the humerus. Which of the following correctly lists the steps of fracture repair in sequence? - ANSWER A hematoma forms, granulation tissue and fibrocartilage develop, osteoclasts and phagocytes clear away debris, bony callus forms. A meniscus cushions articulating surfaces of bones. - ANSWER True Which of the following is not found associated with spongy bone? - ANSWER Osteons The parietal bones meet each other along the sagitt