What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 23, Problem 15MC
Summary Introduction
Introduction:
The nervous system is separated from the rest of the body by a protective layer called the blood brain barrier.
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Which statement is true regarding the nervous system?
a) Damaged myelin on an axon has no effect with its ability to transmit an action potential
b) Depolarization is the reduction of the membrane potential; going from negative to a more positive charge
c) Neuroglia cells are only responsible for providing immunity to the nervous cells
d) Neurons can communicate with other cells without the use of neurotransmitters
Which of the following brain regions is not correctly matched to itsfunction?a. The medulla oblongata regulates heartbeat, breathing, and bloodpressure.b. The cerebellum coordinates voluntary muscle movements.c. The thalamus secretes melatonin, which regulates daily bodyrhythms.d. The midbrain acts as a refl ex center for visual, auditory, andtactile responses.
5) The division of the nervous system responsible for the preparation of the body in case of emergency(i.e. fight or flight) is thea. central nervous sYstem.b. parasympathetic nervous system. c. sympathetic nervous sYstem.d. none of the above.
6) Neurons that carry impulses toward effector organs and muscles are calleda. motor neurons.b. afferent neurons.c. sensory neurons. d. both a and b.
Chapter 23 Solutions
What is Life? A Guide to Biology with Physiology
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- 5) cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervous system? a) sympathetic division b) sensory(afterent) division c) parasympathetic division d)somatic nervous systemarrow_forwarda. It monitors sensory impulses from internal organs. b. It is composed of brain and spinal cord c. It is the area where sensory information gets processed. d. It consist of sympathetic and parasympathetic subdivisions. e. It is made up sensory and motor divisions. f. It controls smooth muscles, cardiac muscles and glandular secretions during stressful situations. g. It controls voluntary movement of skeletal muscles. h. It dominates when resting after a meal. 1. CNS 2. PNS 3. Somatic NS 4. Sympathetic 5. Parasympathetic 6. Sensory division 7. Autonomic neural system 8. Visceral sensory receptors Check Answer a a a a a a a ល. a > < < < < <arrow_forwardWhich of the following statements about the functional divisions of the nervous system is false?a. Somatic sensory neurons carry signals from a range of sources like skeletal muscles, the skin, and special sensory organs.b. Visceral sensory neurons carry signals from organs such as the heart and kidneys to the spinal cord and brain.c. Somatic motor neurons regulate involuntary secretions from glands and the contraction of smooth and cardiac muscles.d. The autonomic nervous system is a key regulator of homeostasisin the body.arrow_forward
- Mark the following statements as true of false. If a statement is false, correct it to make a true statement. a. Ependymal cells regulate the composition and movement of cerebrospinal fluid. b. Schwann cells make myelin in the peripheral nervous system c. Microglia are neuroglial cells with an immune function. d. Oligodendrocytes repair damaged axons in the peripheral nervous system. e. Astrocytes regulate the extracellular environment of the brain and are key components of the blood-brain barrier. f. Oligodendrocytes and Schwann cells perform similar functions in different parts of the nervous system.arrow_forwardThe rate of information transmission from the central nervous system (CNS) to an effector organ will be slowed by... A. increasing the diameter of the axons B. increasing the number of nerve cells between the CNS and the effector organ C. adding a myelin sheath to the axons D. increasing the distance between the nodes of Ranvier E. None of the abovearrow_forward1) Which of the following accurately describes the direction of an impulse moving through a neuron that carries information to the central nervous system (CNS) from the peripheral nervous system (PNS)?a. A sensory (afferent) neuron, impulse moving distally.b. A motor (efferent) neuron, impulse moving proximally.c. A motor (efferent neuron, impulse moving distally.d. A sensory (afferent) neuron, impulse moving proximally. 2) The central nervous system (CNS) is composed ofa. spinal nerves.b. sense receptors.c. the brain and spinal cord.d. nerves of the internal organs.arrow_forward
- The function of neuroglia is to a. carry messages from the PNS to the CNS. b. support and protect neurons. c. stimulate muscle contraction. d. store memories.arrow_forward37) preparing the body for the fight or flight response is the role of the...? a) cerebrum b) sympathetic division c) somatic nervous system d) parasympathetic divisionarrow_forwardThe process of myelination results in an increase in white matter. Myelination happens for all brain regions. Because of increases in myelination A) At the same time; neural signals can travel through the brain faster B) At different times; neural signals can travel through the brain faster C) At different times; neurogenesis is improved D) At the same time; neurogenesis is improvedarrow_forward
- Which of the following describe the myelination of the nervous system correctly? Please select all that apply. A) Caudal structures are myelinated before rostral structures. B) Myelination of the human central nervous system is not complete until around the age of 25 years. C) Sensory systems are myelinated before motor systems in the cerebral cortex. D) Myelination at different ages is not very predictive of behavioral differences.arrow_forwardMatch the types of neuroglia to their functions. (1) ependymal cells (2) oligodendrocytes (3) astrocytes (4) Schwann cells (5) microglial cells A. form a myelin sheath around peripheral nerves B. phagocytize cellular debris and bacteria C. line inner parts of ventricles and spinal cord D. form scar tissue and regulate ion and nutrient concentrations in the CNS E. form a myelin sheath around neurons in the CNSarrow_forwardThe brain & the spinal cord are protected by: Select one: a. The bones of the skull and the vertebral column. b. The meninges c. The cerebrospinal fluid (CSF) d. All are correct e. (a) and (b) onlyarrow_forward
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