) Which two of the following terms are the name nervous system? s for the princi
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Question
) Which two of the following terms are the name nervous system? s for the principal divisions of the central/peripheral B) cranial/spinal C) sensory/motor D) affer ent/efferent 2) Th enervous system consists of two principal kinds of cells: moto above r/sensory B) neurons/neuroglia C) axons/dendrites D) none of the Which of the following control the time span of inhalation? A) medulla oblongata ( pons C) midbrain D) all of the above The "white of the eye" is called the: 3) 4) A) choroid B) conjunctivasclera D) uvea Which of the following vibrate last? A) tympanic membrane B) malleus C) incus D) stapes 5) Which of the tollowing is a Telencephalon structure? A) Cerebrumcerabellum Q) pons D) cerebral peduncles 6) Z) Damage towhich of the following nerves can lead to cross-eyedness? A opticculomotor C) abducens D) facial The "fight or flight" response in under the control of which division? ) sympathetic B) parasympathetic C) craniosacral D) all of the above 8)Explanation / Answer
1. The nervous system is divided into central and peripheral nervous system. The central nervous system includes the brain and spinal cord while the peripheral nervous system has the nerves to and from the central nervous system. The PNS is somatic (touch, hearing, muscles involved in body movement etc) or autonomic (internal senses of gut, smooth muscles of gut etc). Autonomic PNS can be sympathetic or parasympathetic.
Option is A.
2. The nervous system has two types of cell: neurons and neuroglia. Neurons process information while the neuroglia provides support to the neurons. Neurons are composed of dendrites, cell body, and axon. Neuroglia are specialized cells that are involved in mechanical and metabolic support to the neuron. In the CNS, astrocytes, microglial cell, Oligodendrocytes and Ependymal cells are the neuroglia. PNS has satellite cells and Schwann cells.
Option is B.
3. The rate/time of inhalation and exhalation (involuntary respiration) is controlled by the pons. Respiration increases during exercise and reduces during rest. It is located beneath the medulla oblongata and has two centers. The apneustic center involved in inspiration and deep breath and the pneumotaxic center that inhibits inhalation. The medulla oblongata controls the level of oxygen and carbon dioxide and signals the heart, diaphragm and lungs to increase or decrease the breathing rate.
Option is B.
4. The sclera is known as the white of the eye. It helps to maintain the structure of the eye and protect it too. It surrounds the cornea and is composed of dense connective tissue. It has a limited supply of blood vessel and is metabolically inactive.
Option is C.
5. The staples is the last bone that vibrates during hearing. Sound waves first hit the tympanic membrane or eardrum. The eardrum transmits the vibration to the malleus of the ossicles. Malleus vibrates and then transmits the vibration to incus. The vibrations in incus are transmitted to the staples. Staples is a small bone that vibrates and its movement pushes the oval window in and out. The pushing action of the oval window passes vibrations to the cochlea that will convert these vibrations to electrical signals that are recorded by the brain.
Option is D.
6. Forebrain is divided in Telencephalon ad Diencephalon. The cerebrum is composed of telencephalonic structure. The cerebral cortex is the outermost surface of the cerebrum and is the grey matter in the brain. It has four parts: the frontal lobe, the parietal lobe, the occipital lobe, and the temporal lobe.
Option is A.
As per Chegg’s rules, only one question is mandatory to be answered.
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