MPP BLOCK 2 QUESTIONS WITH VERIFIED ANSWERS { GRADED A+}

MPP BLOCK 2 QUESTIONS WITH

VERIFIED ANSWERS { GRADED A+}




Endocrine Signaling: - ✔✔Hormones


Long distance


Long time scale (minutes, hours, days)


Neuronal Signaling: - ✔✔Close proximity


Very fast (ms)


Electrical impulse and chemical (neurotransmitters)


Central nervous system - ✔✔•brain and spinal cord


Peripheral nervous system - ✔✔nerves leaving from CNS: cranial, thoracic,

lumbar and sacral nerves


Neurons - ✔✔conduct electrical signals but generally can not divide

, Glial cells (neuroglia): - ✔✔support the neurons and can divide, but cannot

conduct electrical signals


Neurotransmitters (ligands) - ✔✔Release chemical regulators


Dendrites - ✔✔receive chemical signals and conduct a graded impulse toward the

cell body


Axon - ✔✔conducts action potentials away from the cell body towards the

terminal using voltage gated channels


Sensory neurons - ✔✔•conduct impulses from sensory receptors to the CNS


•to the brain (afferent)


Motor neurons - ✔✔•conduct impulses from the CNS to target organs (muscles or

glands)


•from the brain (efferent)


cell body - ✔✔contains the nucleus and other organelles


Somatic motor neurons - ✔✔responsible for reflexes and voluntary control of

skeletal muscles (selective)


ganglia - ✔✔Cell bodies are often clustered together in the PNS