BIO 436 Lecture 4 Practice Questions and Correct Answers
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Course
BIO 436
Institution
BIO 436
What are the two major ways in which cells of the body communicate systemically? 1) endocrine system 2) nervous system
What is a neuron? a nerve cell that has a cell body, dendrites, axon, axon hillock, and axon terminals
What are nerves? are bundles of neurons - both afferent and efferent neuron...
BIO 436 Lecture 4 Practice Questions
and Correct Answers
What are the two major ways in which cells of the body communicate systemically?
✅1) endocrine system
2) nervous system
What is a neuron? ✅a nerve cell that has a cell body, dendrites, axon, axon hillock,
and axon terminals
What are nerves? ✅are bundles of neurons - both afferent and efferent neurons are
"bundled" together
How many spinal nerves are there? ✅31 pairs
How many cervical nerves are there? ✅8 pairs (C1-C8)
How many thoracic nerves? ✅12 pairs (T1-T12)
How many lumbar nerves? ✅5 pairs (L1-L5)
How many sacral nerves? ✅5 pairs(S1-S5)
How many coocygeal? ✅1 pair
What is the function of sensory/afferent neurons? ✅conduct impulses into CNS form
PNS
- receive or bring information form outside stimuli to CNS, in through dorsal root of the
spinal cord
What is the function of motor/efferent neurons? ✅carry out impulses from the CNS, out
of ventral root into the body (effector organs, glands, muscles)
Receptors ✅sensory neuron into CNS from PNS
Skeletal muscles ✅somatic motor neuron from CNS to PNS
Smooth muscle , Cardiac muscle, glands ✅autonomic motor neurons from CNS to
PNS
How do cells signal one another? ✅through neurotransmitter, nervous system,
endocrine and through the use of molecules (peptides, proteins, amino acids, etc.)
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