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BIO 253 EXAM 2
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Exam study book Concepts of Biology of Samantha Fowler, Rebecca Roush, James Wise - ISBN: 9781680921021 (BIO 253 EXAM 2)
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BIO 253 EXAM 2,3 AND FINAL EXAM PACKAGE DEALLATEST ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES |AGRADE
What Is The Function Of The Nervous System? - ANSWER: - master regulatory system
- sends and receives information
- maintains homeostasis
-acts as center for thought, learning, and memory
What is Sensory Input? - ANSWER: Apart of the nervous system that detects change.
What is Integration and Processing? - ANSWER: apart of the nervous system that is
decision making.
What is Motor Output? - ANSWER: apart of the nervous system that stimulates
muscles and glands to respond.
What Are The Main Cell Types of Nervous System? - ANSWER: Neurons and
Neurogila
What are Neurons? - ANSWER: -one of the main cells in the NS
- respond quickly to changes/stimuli
- conduct electric impulses via neurotransmitters
What is a Neuroglia Cell? - ANSWER: - one of the main cells in the NS
- protect, support, insulate, and nourish neurons
- do not conduct electrical impulses like neurons
What Is The Flow Of Information In The NS? - ANSWER: 1. sensory receptor = sensor
input
2. brain and spinal cord = intergration
3. effector = motor output
What is the CNS Made Up Of? - ANSWER: the brain and spinal cord
What Is The PNS Made Up Of? - ANSWER: cranial nerves and spinal nerves. connects
CNS to other body parts
What Is Sensory Function? - ANSWER: - nervous system receives information
- sensory receptors gather info by detecting changes
- info is carried to the CNS
What Is Integrative Function? - ANSWER: - NS coordinates sensory info to create
sensations, memory, and thoughts
- NS makes decisions on body's response to sensory info
, What Is Motor Function? - ANSWER: - decisions are acted upon
- impulses are carried to effectors ( muscles and glands)
- divisions of motor portion of PNS: somatic NS and autonmic NS
What Is The Somatic NS? - ANSWER: it transmits VOLUNTARY instructions to skeletal
muscles.
What Is The Autonmic NS? - ANSWER: transmits INVOLUNTARY instructions from the
CNS to smooth muscles, cardiac muscle, and glands.
What Does The Cell Body Consist Of? - ANSWER: 1. neurofilaments
2. chromatophilic substance
What Does The Axon Consist Of? - ANSWER: 1. axon hillock
2. collaterals
3. axon terminal
4. synaptic knob
5. may be myelinated
What Is A Schwann Cell? - ANSWER: - PNS neuroglia that encase axon in a sheath
- schwann cell wrap tightly around axon in layers composed of of myelin a
lipoprotein mixture
- coating is called the Myelin Sheath
- Nodes of Ranvier
What Are The Nodes Of Ranvier? - ANSWER: gaps in myelin sheath between
schwann cells.
What Are Multipolar Neurons? - ANSWER: - 99% of neurons
- many processes
- most neurons of CNS
What Are Bipolar Neurons? - ANSWER: - two processes
- eyes, ear, nose
What Are Unipolar Neurons? - ANSWER: - one process
- cell bodies are ganglia
- sensory
What Are Sensory Neurons? - ANSWER: - afferent neursons
- carry impulse to CNS
- most are unipolar
- some are bipolar
What Are Interneurons? - ANSWER: - association neurons
- link neurons
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