Anatomy & Physiology Nervous System Part I 2/26/16 NOTE: LOOK ON MY WEBSITE FOR THE MUSCLE LABELING POWER POINT/PDF Part I. Identify the parts of the neuron that are labeled below. 1. 2. 3. 5. 4. 6. Part II. Match each of the types of cells below with its appropriate description/function. 7. Provides myelin sheath around axons in the CNS. 8. Phagocytizes bacterial cells and debris. 9. Provides myelin sheath around axons in the PNS. 10. Lines and covers parts of the brain and spinal cord. 11. Helps regulate nutrient concentrations within nervous tissue. A. astrocytes B. ependymal cells C. microglial cells D. oligodendrocytes E. Schwann cells Part III. Multiple Choice 12. Support cells in the nervous system are collectively called. A) myelin sheaths B) neuroglial cells C) oligodendrocytes D) microglial cells 13. The part of the neuron that typically conducts nerve impulses away from the cell body is the. A) dendrite B) cell body C) synaptic cleft D) axon
Anatomy & Physiology Nervous System Part I 2/26/16 14. The gaps between Schwann cells found at regular intervals in peripheral system neurons are called. A) synaptic clefts B) axon terminals C) nodes of Ranvier D) myelin sheaths 15. What are the two types of motor functions of the nervous system? A) sensory, somatic B) somatic, cranial C) somatic, autonomic D) sympathetic, parasympathetic 16 What are the two major divisions of the nervous system? A) cranial, spinal B) central, peripheral C) anterior, inferior D) central, medial Part IV. True or False 17. At rest, the membrane potential of a neuron is classified as A) negative B) positive C) neutral D) active 18. The potential that a neuron must reach before an impulse can be generated is called A) resting potential B) positive potential C) running potential D) threshold potential 19. The is a membrane found in Schwann cells that aids in axon regeneration. A) plasma B) mitochondria C) myofilament D) neurilemmal 20. The mechanism by which an impulse travels through an axon in the brain is called saltatory conduction. 21. Multiple sclerosis is a disease where the myelin sheaths surrounding axons is damaged or destroyed. 22. An action potential is caused by the entrance of potassium ions into the neuron. 23. Axons in the PNS are able to be regenerated. 24. Soma is another name for an axon terminal. 25. In the PNS, neurons can contain multiple axons.
Directions: For numbers 1 18, select the correct answer choice. For numbers 19 and 20, answer each question in writing. 1) The epimysium covering on the outside of the muscle can blend into cordlike or sheetlike. A) tendons; aponeuroses B) ligaments; tendons C) fascia; ligaments D) aponeuroses; ligaments 2) The is an organelle that stores and releases calcium. A) cross bridge B) sarcomere C) sarcolemma D) sarcoplasmic reticulum 3) One neuron and all the skeletal muscles it stimulates is known as a. A) sarcoplasmic reticulum B) motor unit C) synaptic cleft D) neuromuscular junction 4) The heads of the myosin myofilaments are called when they link the thick and thin filaments together during skeletal muscle contraction. A) neuromuscular junctions B) synapses C) cross bridges D) motor units 5) The gap between the motor neuron and the muscle fiber it supplies at the neuromuscular junction is called the. A) synaptic cleft B) motor unit C) cross bridge D) H zone 6) Endomysium covers. A) fascicles of muscle fibers B) an entire muscle C) an individual muscle fiber D) myofibrils E) smooth muscle only 7) The plasma membrane of a skeletal muscle cell is called the. A) sarcolemma B) sarcomere C) myofilament D) sarcoplasm E) sarcoplasmic reticulum
8) Which of the following is NOT a function of the muscular system? A) production of movement B) maintenance of posture C) stabilization of joints D) generation of heat E) hematopoiesis 9) A sarcomere is. A) the nonfunctional unit of skeletal muscle B) the contractile unit between two Z discs C) the area between two intercalated discs D) the wavy lines on the cell, as seen in a microscope E) a compartment in a myofilament 10) Which one of the following is composed of myosin protein? A) dark bands B) light bands C) all myofilaments D) Z discs 11) Acetylcholine is. A) an ion pump on the postsynaptic membrane B) a source of energy for muscle contraction C) a component of thick myofilaments D) an oxygen-binding protein E) a neurotransmitter that stimulates skeletal muscle 12) Neurotransmitters are released upon stimulation from a nerve impulse by the. A) myofibrils B) sarcoplasmic reticulum C) thick filaments D) axon terminals of the motor neuron E) sarcolemma of the muscle cell 13) Anaerobic glycolysis occurs without. A) ATP B) oxygen C) lactic acid D) carbon dioxide E) glucose 14)Which of the following statements about skeletal muscle tissue is true? A) Skeletal muscle tissue is involuntary, striated, and multinucleate. B) Skeletal muscle tissue is voluntary, striated, and multinucleate. C) Skeletal muscle tissue is voluntary, unstriated, and uninucleate. D) Skeletal muscle tissue is voluntary, striated, and uninucleate. 15) A bundle of muscle fibers is wrapped by the A) epimysium B) perimysium
C) endomysium D) aponeurosium 16) The thread-like organelles containing actin and myosin filaments are called A) myofilaments B) sarcobrils C) myofibrils D) sarcofilaments 17) Botox injections temporarily prevent facial muscles from contracting. Which of the following statements might explain how botox works? A) The botox poison prevents acetylcholine secretion into the synaptic cleft. B) The botox poison causes an increase in the concentration of calcium ions in the sarcoplasm. C). The botox poison blocks interaction between acetylcholine and acetylcholinesterase. D) The botox poison aids in the increased rate of ATP production. 18) Which term is the smallest subdivision in this group? A) fiber B) fibril C) filament D) actin