week 1/2 sem 2 Quiz

Question 1

the point where the axon of one neuron interacts with the dendrite or cell body of another axon is known as the _______.

Answer 1

synapse

Question 2

What interacts at a synapse?

Answer 2

the axon of a neuron and a muscle cell

Question 3

The synapse is the point where ______ are released into the ______ ______.

Answer 3

neurotransmitters, synaptic cleft

Question 4

At the synapse neurotransmitters are not _____.

Answer 4

synthesised

Question 5

When an EPSP or IPSP occurs at an axonal synapse, there can be __________ inhibition or presynaptic ____________ of neurotransmitter release from the synaptic _______.

Answer 5

presynaptic, facilitation, knob

Question 6

True or False-

The rate of action potential generation at a postsynaptic membrane is constant for each particular synapse.

Answer 6

False- the rate of action potential generation at a postsynaptic membrane is NOT CONSTANT for each particular synapse.

Question 7

What can extracellular chemicals (other than neuromodulators and neurotransmitters) cause in neurons?

Answer 7

Inhibition and Facilitation

Question 8

If the axon ______ remains depolarized for an extended time, a new action potential will be generated as soon as the _______ __________ period of the previous one has ended.

Answer 8

HILLOCK, ABSOLUTELY REFRACTORY

Question 9

Synaptic delay is greater at synapses of __________neurons than at those of _________neurons.

Answer 9

UNMYELINATED, MYELINATED

Question 10

About half the _________ released at a synapse is broken down before it reaches the ________receptors

Answer 10

acetylcholine, postsynaptic

Question 11

Under intense stimulation, what may happen to a neuron?

Answer 11

a neuron may run out of neurotransmitter and suffer synaptic fatigue

Question 12

What does the speed at which an action potential is transmitted depend on?

Answer 12

The myelination and diameter of the axon

Question 13

Afferent neurons transmit sensory information to the _______, _______ neurons transmit commands to the effector organs,__________ transmit and process within the CNS

Answer 13

CNS, efferent, interneurons

Question 14

How are neurotransmitters removed from the synaptic cleft?

Answer 14

Diffusion
Enzymatic Degradation
Reuptake by the axon terminal

Question 15

What spinal tract relays proprioceptive signals to the cerebellum?

Answer 15

Anterior spinocerebellar tract

Question 16

Acetylcholine binds predominantly to what type of receptor?

Answer 16

both inhibitory and excitatory

Question 17

What does a loss of proprioception result in?

Answer 17

An inability to learn new movement tasks.

Question 18

What are length detecting proprioceptive sensors in skeletal muscles are known as?

Answer 18

muscle spindles

Question 19

monosynaptic reflexes have a _____ synapse.

Answer 19

single

Question 20

What reflexes have the shortest delay?

Answer 20

Monosynaptic reflexes.

Question 21

______ reflexes are the simplest reflexes.

Answer 21

monosynaptic

Question 22

reflexes can be classified as:
-the complexity of the ______ ______
-the site where I______ processing occurs
and
- the nature of the resulting ______ response

Answer 22

neural circuit
information
motor

Question 23

What is the knee jerk reflex an example of?

Answer 23

a monosynaptic reflex and a stretch reflex

Question 24

The knee jerk is an _____ reflex.

Answer 24

Acquired

Question 25

What produces contraction of quadriceps during walking?

Answer 25

The knee jerk reflex

Question 26

What is the last step in the activation of a reflex arc?

Answer 26

The response of an effector (muscle)

Question 27

The stretch reflex is an example of a _____ _______reflex

Answer 27

segmental spinal

Question 28

The stretch reflex occurs in combination with what?

Answer 28

with reciprocal inhibition of antagonist muscles

Question 29

The stretch reflex involves ______ _________ of stretched muscles

Answer 29

monosynaptic excitation