Bmsc207 test - Study guides, Class notes & Summaries

BMSC207- Module 4 Test with Questions and 100% Correct Answers

BMSC207- Module 5 Test with Questions and 100% Correct Answers

Is Myelinated axons larger or smaller diameter axons then unmyelinated? - Answer - Myelinated axons are larger diameter axons (10um about 120 m/sec) - Unmyelinated axons are smaller diameter axons (1.5um about 2 m/sec) What is demyelination? - Answer - only nodes contain Na+ channels, the AP cannot be maintained in the unmyelinated region due to a lack of Na+ channels - current leaks out of the unmyelinated region, increasing the likelihood that the wave of depolarization is subthreshold w...

BMSC207- Module 1 Test with Questions and 100% Correct Answers

BMSC207- Module 6 Test with Questions and 100% Correct Answers

what is the flexor? - Answer brings bones together what is the extensor? - Answer moves bones away what percent is skeletal muscle of the total body weight? - Answer 40% what is the muscle fiber? - Answer It is a muscle cell. what is the sarcolemma? - Answer muscle cell membrane

what is the autonomic nervous system? - Answer - involuntary control of smooth muscle, cardiac muscle, many glands and some adipose tissue what is the autonomic nervous system subdivided into? - Answer - sympathetic - parasympathetic what does the autonomic nervous system work with to maintain homeostasis? - Answer with the endocrine system and behavioral systems

what is the midbrains? - Answer - junction between lower brainstem and diencephalon (nuclei and tracts) What does the midbrain do? - Answer - primary function is controlling eye movement - also relays auditory and visual reflexes (movement of body in response to these stimuli - contains the substantia nigra

what is one way to increase tension developed by a single muscle fibre? - Answer to increase the rate at which action potentials occur in the fibre what can the whole skeletal muscle force be increased by? - Answer the recruitment of additional motor units what is a motor unit? - Answer a single motor neuron and all the muscle fibres it innervated, one motor neuron innervated one fibre type

where do satellite glial cells exist? - Answer within ganglia (bundles of cell bodies) in the PNS what do the satellite glial cells do? - Answer - forma supportive capsule around the cells bodies of neurons (sensory and autonomic) - supply nutrients - structural support, provide a protective cushion