Nerve+system+Worksheet+I

1.- The diagram below is of a nerve cell or neurone. i. Add the following labels to the diagram.**Axon; Myelin sheath; Cell body; Dendrites; Muscle fibres**;ii. If you like, colour in the diagram as suggested below.Axon - purple;Myelin sheath - yellow;Cell body - blue;Dendrites - green;Muscle fibres – red;iii. Now indicate the direction that the nerve impulse travels. 2. There are three different kinds of neurone or nerve cell. Match each kind with its function. to the brain or spinal cord. || or spinal cord to a muscle or gland ||
 * A. Motor neuron; B. Sensory neuron; C. Relay neuron;**
 * ~ Kind of neurone ||~ Function ||
 * ................................... || The nerve cell that carries impulses from a sense receptor
 * .................................... || The nerve cell that connects sensory and motor neurons ||
 * ..................................... || The nerve cell that transmits impulses from the brain

3. Match the descriptions in the table below with the terms in the list. between neurons at a synapse. || speeds up the passage of nerve impulses. || to transmit the nerve impulse across the synapse. || towards the cell. || and outside the body. ||
 * A. Synapse; B. Axon; C. Myelin sheath; D. Nerve impulse; E. Sense receptor; F. Response;****G.Reflex; H. Cell body; I. Dendrite; J. Nerve; K. Neurotransmitter; L. Axon terminal**
 * ~ Term ||~ Function ||
 * .............................. || 1. The long fibre that carries the nerve impulses. ||
 * .............................. || 2. A bundle of axons. ||
 * .............................. || 3. The connection between adjacent neurons. ||
 * ............................... || 4. The chemical secreted into the gap
 * ............................... || 5. A rapid automatic response to a stimulus. ||
 * ............................... || 6. The covering of fatty material that
 * ................................... || 7. The structure at the end of an axon that produces neurotransmitters
 * ................................ || 8. The high speed signals that pass along the axons of nerve cells. ||
 * ................................ || 9. The branching filaments that conduct nerve impulses
 * ..................................... || 10. The sense organ or cells that receive stimuli from within
 * ..................................... || 11. The reaction to a stimulus by a muscle or gland. ||
 * ..................................... || 12.The part of the nerve cell containing the nucleus. ||

4. The diagram below shows a cross-section of the spinal cord. Add the following labels to the diagram.
 * Central canal; White matter; Dorsal root; Grey matter; Ventral root; Skin;****Muscle; Sensory neuron; Relay neuron; Motor neuron; Pain receptors in skin**

5. a) List in order the 3 different neurons involved in a reflex arc from the stimulus to the response.
 * ~ Stimulus || ........................... || ........................... || ........................... ||~ Response ||

b) Name 3 different reflexes found in animals. Reflex 1.............................. Reflex 2.............................. Reflex 3..............................

6. 7. -Indicate whether the following parts of the nervous system are part of the **Central Nervous System CNS)** or the **Peripheral Nervous System (PNS).**
 * ~ Part of nervous system ||~ CNS or PNS? ||
 * Brain || ........................ ||
 * Autonomic nervous system || ........................ ||
 * Spinal nerves || ........................ ||
 * Spinal cord || ........................ ||
 * Cranial nerves || ......................... ||

8. The diagram below shows a section of a dog’s brain. Add the labels in the list below and, if you like, colour in the diagram as suggested. Cerebellum - blue;Spinal cord - green;Medulla oblongata - orange;Hypothalamus - purple;Pituitary gland - red;Cerebral hemispheres – yellow. 9. Match the descriptions below with the terms in the list. You may need to use some terms more than once. movements are controlled. || including intelligence, memory, and learning. || brain and spinal cord. || are interpreted. ||
 * A. Cerebral hemispheres; B. White matter; C. Cerebellum; D.Medulla oblongata; E. Hypothalamus; F. Pituitary; G. Grey matter; H. Meninges; I. Ventricles; J. Cerebrospinal fluid; K. Sulcus; L. Carotid artery**
 * ~ Term ||~ Description ||
 * ............................. || 1. Controls water balance and body temperature. ||
 * .............................. || 2. Where the respiratory rate is controlled. ||
 * ............................... || 3. Where posture, balance and voluntary muscle
 * ............................... || 4. Contains centres governing mental activity,
 * ............................... || 5. The tough fibrous envelope enclosing the
 * ............................... || 6. The “master” gland of the endocrine system. ||
 * ............................... || 7. Responsible for instigating voluntary movements. ||
 * ............................... || 8. The fluid that surrounds the brain and spinal cord. ||
 * .............................. || 9. Composed of cell bodies and nuclei. ||
 * .............................. || 10. Composed of axons. ||
 * ............................... || 11. Where the sensations of sight, sound, taste etc.
 * ................................ || 12. Spaces in the brain filled with cerebral spinal fluid. ||
 * ................................ || 13. A fold in the cerebral cortex. ||
 * ................................. || 14. The artery that supplies the brain with oxygenated blood. ||

10. Match the descriptions below with the parts of the nervous system in the list. You may need to use some terms more than once. brain and the spinal cord. || ........................ || cranial and spinal nerves. || .......................... || the activity of the heart and smooth muscle. || ........................... || respiratory rates, increases blood flow to the skeletal muscles and dilates the pupils of the eye. || ............................ || and decreases heart and respiratory rates. || ............................ ||
 * A. Autonomic nervous system; B. Central nervous system; C. Peripheral nervous system;****D. Parasympathetic nervous system; E. Sympathetic nervous system**
 * ~ Description ||~ Part of the nervous system ||
 * 1. Part of the nervous system that is composed of the
 * 2. Part of the nervous system that is composed of the
 * 3. The part of the peripheral nervous system that regulates
 * 4. The part of the autonomic nervous system that increases heart and
 * 5. The part of the autonomic nervous system that increases gut activity

11. Name the nerves described below using the choices in the list. balance and hearing to the brain. || retina of the eye to the brain. || in the nose to the brain. || stomach and most of the abdominal organs. ||
 * Olfactory nerve; Sciatic nerve; Vagus nerve; Optic nerve; Vestibular nerve**
 * ~ Nerve ||~ Description ||
 * .......................... || 1. The 8th cranial nerve that carries impulses from the organs of
 * ........................... || 2. The 2nd cranial nerve that carries nervous impulses from the
 * ............................ || 3. The largest nerve in the body serving the muscles of the leg. ||
 * ............................ || 4. The 1st cranial nerve that carries impulses from the organ of smell
 * .............................. || 5. The 10th cranial nerve that supplies the pharynx, lungs, heart,