Human Biology - Chapter 11 - The Nervous System

Multiple Select

Select all that apply: The function of the nervous system is to control

• voluntary movement

• our senses (sight, hearing, touch, taste..)

• our memories and thoughts

• Involuntary actions likes breathing and heart beat

Multiple Choice

The neuron illustrated would be classified correctly as

• motor

• sensory

• connector

• multipolar

Reorder

Reorder the following

• Action potential reached (+30mV)

• Na+ inactivation gates close, K+ gates open

• K+ exits the cell, repolarization

• K+ still open, goes below -70 mV, hyperpolarization

• Na/K pump restores to resting potential

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

What is the difference between the absolute refractory period and the relative refractory period?

• Absolute refractory period allows action potentials to start

• Relative refractory period requires a large impulse to start another action potential

• Both periods prevent action potentials from occurring

• Only the absolute refractory period is important for nerve impulses

Multiple Choice

What happens during repolarization of a neuron's membrane?

• Sodium ions (Na+) flow out of the neuron

• Potassium ions (K+) flow into the neuron

• Potassium ions (K+) flow out of the neuron

• Sodium ions (Na+) flow into the neuron

Multiple Choice

How does the action potential propagate along the axon of a neuron?

• By passive flow of ions only

• By active transport of ions

• By sequential opening of voltage-gated ion channels

• By diffusion of neurotransmitters

Open Ended

Explain the process of saltatory conduction in the context of axon segments.

Multiple Choice

What is the role of calcium in synaptic transmission?

• It causes neurotransmitters to be stored

• It causes vesicles to fuse with the membrane

• It opens sodium channels

• It prevents neurotransmitter release

Multiple Choice

What are the two types of neurotransmitter actions described in the image?

• Excitatory and Inhibitory

• Summation and Frequency

• Convergence and Divergence

• Chemical and Electrical

Multiple Choice

What are the functions of the posterior and anterior roots in the PNS?

• Posterior is sensory signal

• Anterior is motor signal

• Both are sensory signals

• Both are motor signals

Multiple Choice

What are the three types of reflexes mentioned in the image?

• Flexor reflex

• Stretch reflex

• Crossed extensor reflex

• Patellar reflex

Multiple Choice

What are the two types of neurons involved in motor signals in the autonomic system?

• Preganglionic neuron

• Postganglionic neuron

• Sensory neuron

• Interneuron

Multiple Choice

What is the primary neurotransmitter associated with the sympathetic nervous system?

• Dopamine

• Serotonin

• Norepinephrine

• Acetylcholine

Multiple Choice

What are the three main regions of the brain and their functions?

• Hindbrain - autonomic tasks

• Midbrain - coordinates muscle groups

• Forebrain - complex behavior

• All of the above

Multiple Choice

What are the main functions of the hindbrain components mentioned in the image?

• Medulla Oblongata

• Pons

• Cerebellum

• All of the above

Multiple Choice

What are the functions of the midbrain as described in the image?

• Looking at visually significant objects

• Looking toward a sound

• Coordinates pupil size

• All of the above

Multiple Choice

What are the main functions of the hypothalamus?

• Autonomic and endocrine function

• Coordinates sensory input

• Controls voluntary movement

• Processes visual information

Multiple Choice

What are the primary functions of the cerebral cortex?

• Sensory interpretation

• Motor control

• Memory

• All of the above

Open Ended

Describe the role of the temporal lobe in brain function.

Multiple Choice

What are the effects of sleep deprivation on health?

• Impaired cognition

• Increased risk of heart disease

• Higher levels of anxiety

• All of the above

Multiple Choice

What are the main functions of the limbic system?

• Regulating body temperature

• Dealing with emotions and response

• Controlling motor skills

• Processing visual information

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident