HHP 1300 University of Iowa: Fundamentals of Human
Physiology, Exam 2 | UPDATED Questions with 100%
Verified Answers
Q1: Nervous System
A: Consists of
CNS
PNS
Q2: CNS
A: Brain and Spinal cord
Function in control and integration
Q3: PNS
A: Cranial nerves and spinal nerves
Motor and sensory
Q4: Neurons
A: Nerve cells that conduct electrical signals
Q5: Neuroglia
A: Majority of all nerve tissue cells
Support neurons
Q6: Parts of neuron
A: Dendrites
Cell Body
Axonal hillock
Axon
Axon terminal
Q7: Myelin
A: Protective coating over the axon
Makes the message through the axon flow faster and smoother
Q8: Types of neurons
A: Afferent
Efferent
Interneurons
Q9: Afferent neurons
,A: Carry signal away from the sensors
Q10: Efferent neurons
A: ANS; Sends info from CNS to trigger motor response
Q11: Interneurons
A: CNS; Communicate between sensory and motor neurons
Q12: Neuroglia
A: Non conducting cells; PNS and CNS; aid the neurons
Q13: Types of Neuroglia
A: Schwann cells
Oligodendrocytes
Astrocytes
Microglia
Ependymal cells
Q14: Schwann cells
A: PNS; makes myelin
Q15: Oligodendrocytes
A: CNS; makes myelin
Q16: Astrocytes
A: Form part of the blood-brain barrier
Help make glucose for neurons
Absorb extra neurotransmitters
Q17: Microglia
A: Part of the immune system in the brain
Q18: Ependymal cells
A: Help form CSF
Q19: Nerves and muscles
A: Excitable tissues
Q20: Negative
A: Inside of a cell is ____________ relative to the outside.
, Q21: 70mV
A: Resting cell potential
Q22: K+
A: Cell is permeable to ____.
Q23: Na+
A: Cell is impermeable to ____.
Q24: Equilibrium
A: At resting potential, neither K+ or Na+ are in ______________.
Q25: Polarization
A: When membrane potential is other than 0mV
Q26: Depolarization
A: What the charge is less negative than resting membrane potential
Q27: Repolarization
A: When the membrane returns to resting potential
Q28: Hyperpolarization
A: When the cell is more negative than resting membrane potential
Q29: Types of Potential
A: Graded
Action
Q30: Graded potential
A: Magnitude varies with stimulus strength
Decremental
Depolarizing v. Hyperpolarizing
Used for short distances
Q31: Action potential
A: Brief, rapid, and large changes in membrane potential
All or none law
Must reach threshold potential
Not decremental
Begins at axon hillock
Physiology, Exam 2 | UPDATED Questions with 100%
Verified Answers
Q1: Nervous System
A: Consists of
CNS
PNS
Q2: CNS
A: Brain and Spinal cord
Function in control and integration
Q3: PNS
A: Cranial nerves and spinal nerves
Motor and sensory
Q4: Neurons
A: Nerve cells that conduct electrical signals
Q5: Neuroglia
A: Majority of all nerve tissue cells
Support neurons
Q6: Parts of neuron
A: Dendrites
Cell Body
Axonal hillock
Axon
Axon terminal
Q7: Myelin
A: Protective coating over the axon
Makes the message through the axon flow faster and smoother
Q8: Types of neurons
A: Afferent
Efferent
Interneurons
Q9: Afferent neurons
,A: Carry signal away from the sensors
Q10: Efferent neurons
A: ANS; Sends info from CNS to trigger motor response
Q11: Interneurons
A: CNS; Communicate between sensory and motor neurons
Q12: Neuroglia
A: Non conducting cells; PNS and CNS; aid the neurons
Q13: Types of Neuroglia
A: Schwann cells
Oligodendrocytes
Astrocytes
Microglia
Ependymal cells
Q14: Schwann cells
A: PNS; makes myelin
Q15: Oligodendrocytes
A: CNS; makes myelin
Q16: Astrocytes
A: Form part of the blood-brain barrier
Help make glucose for neurons
Absorb extra neurotransmitters
Q17: Microglia
A: Part of the immune system in the brain
Q18: Ependymal cells
A: Help form CSF
Q19: Nerves and muscles
A: Excitable tissues
Q20: Negative
A: Inside of a cell is ____________ relative to the outside.
, Q21: 70mV
A: Resting cell potential
Q22: K+
A: Cell is permeable to ____.
Q23: Na+
A: Cell is impermeable to ____.
Q24: Equilibrium
A: At resting potential, neither K+ or Na+ are in ______________.
Q25: Polarization
A: When membrane potential is other than 0mV
Q26: Depolarization
A: What the charge is less negative than resting membrane potential
Q27: Repolarization
A: When the membrane returns to resting potential
Q28: Hyperpolarization
A: When the cell is more negative than resting membrane potential
Q29: Types of Potential
A: Graded
Action
Q30: Graded potential
A: Magnitude varies with stimulus strength
Decremental
Depolarizing v. Hyperpolarizing
Used for short distances
Q31: Action potential
A: Brief, rapid, and large changes in membrane potential
All or none law
Must reach threshold potential
Not decremental
Begins at axon hillock
