Module 13-14

Question 1

The receptors in the post-synaptic cells are the basis on which the snaps can be defined as inhibitory or excitatory. (T/f)

Answer 1

False

Question 2

Acetylcholine esterase breaks acetylcholine into muscarinic acid (t/f)

Answer 2

False

Question 3

The central nervous system (cns) contains:
A) nerves extending from the spinal cord to the fingers
B) motor neurons extending from the spinal column to the fingers
C) only the brain
D) two of the above
E) there is no correct answer

Answer 3

There is no correct answer

Question 4

Briefly explain why the action potential flows only from the axon hillock to the terminal web

Answer 4

The action potential originates from the axon hillock which initiates the flow of the action potential because of the presence of higher density voltage-gated ion channels

Question 5

In the motor end plate, the event that is the immediate trigger for exocytosis is:

Answer 5

Calcium ions

Question 6

The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs (t/f)

Answer 6

True

Question 7

Only pre-synaptic neurons are coated with myelin (t/f)

Answer 7

False

Question 8

Excitatory synapses cause depolarization of the post-synaptic cell (T/f)

Answer 8

True

Question 9

How do glial cells (i.e., myelin sheath) speed up the firing of neurons

Answer 9

They provide insulation for the axons

Question 10

Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell (t/f)

Answer 10

True

Question 11

The neural tissues are:

Answer 11

Spinal cord, sensory neurons, and brain

Question 12

List the 4 types of glial cells and list a phrase to describe their function

Answer 12

Microglia: deans up cellular debris; astrocytes: support and repair neurons; Schwann cells: myelinates axons of the neurons in the PNS; satellite: form the blood-brain barrier within the CNS

Question 13

Voltage-gated ion channels open when a protein binds to the receptor (t/f)

Answer 13

False

Question 14

The autonomic nervous system contains the sympathetic and parasympathetic nervous system (t/f)

Answer 14

True

Question 15

The terminal web:

Answer 15

Is a site of exocytosis

Question 16

Excitatory synapses make the post-synaptic cell less likely to fire (t/f)

Answer 16

False

Question 17

Potassium ions are at high concentrations inside of cells including in neurons (t/f)

Answer 17

True

Question 18

The post-synaptic cell can be:

Answer 18

In glands, muscle cells, neurons

Question 19

The membrane potential (resting potential) is largely set by the Na-K-ATPase pump (T/f)

Answer 19

True

Question 20

The cell body refers to the part of neurons that begin at the dendrites and extend to the axon terminal (t/f)

Answer 20

False

Question 21

Excitatory synapses cause hyperpolarization of post-synaptic cells (t/f)

Answer 21

False

Question 22

When the presynaptic cell contracts a muscle cell, the synapse area is called a motor end plate. (T/f)

Answer 22

True

Question 23

Receptors are made from membrane-bound polyribosomes (t/f)

Answer 23

True

Question 24

The axon from a pre-synaptic cell contacts the axon of another neuron (t/f)

Answer 24

False

Question 25

The action potential is:

Answer 25

A result of the movement of ions

Question 26

Fast neurons as described in lecture are fast because they are surrounded by a type of glial cell that results in a myelin coating (t/f)

Answer 26

False

Question 27

The resting potential of neurons is:
A) 0mV
B) same as the action potential
C) always a positive value
D) two of the above
C) answer is not on the list

Answer 27

Answer is not on the list

Question 28

Fast neurons as described in lecture repair cytoplasmic signal transduction to open an ion channel (t/f)

Answer 28

False

Question 29

Vitamin D is really a hormone (t/f)

Answer 29

True

Question 30

What could the stress of taking an exam do to your glucose levels in various parts of the body

Answer 30

The adrenal gland’s trigger the release of glucose stored in various organs, which often leads to elevated levels of glucose in the bloodstream

Question 31

The medulla of the adrenal gland produces epinephrine (adrenaline) (t/f)

Answer 31

True

Question 32

Insulin is produced by alpha cells (t/f)

Answer 32

False

Question 33

Vitamin D is synthesized from cholesterol (T/f)

Answer 33

True

Question 34

The parasympathetic nervous system is triggered to act by exposure to epinephrine (t/f)

Answer 34

False

Question 35

Insulin is a ligand

Answer 35

True

Question 36

When the sympathetic nervous system is triggered glycogen is broken down to glucose to provide more energy

Answer 36

True

Question 37

When vitamin D causes the parathyroid to inhibit new PTH synthesis

Answer 37

True