Nervous

22問 • 1年前

問題一覧

What is the relative distribution of sodium and potassium ions across a neuronal membrane?

The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell.

During an Action Potential, What Occurs That Results in Depolarization?

Sodium ions diffuse to the inside of the cell membrane.

During an Action Potential, What Occurs That Results in Repolarization?

Potassium ions diffuse to the outside of the cell membrane.

What Part of the Brain Coordinates Voluntary Muscle Movements?

Cerebellum

Where are the cardiac and vasomotor centers located?

Medulla oblongata

The respiratory areas are in the pons and in the __________.

medulla oblongata

What converts environmental information into impulses that are then conducted to the central nervous system?

Sensory receptors

What branch of the peripheral nervous system controls skeletal muscle?

Somatic

What is the structure called that is a branch-like sensory process of a neuron that provides the main receptive surface for communication?

Dendrite

What Part of A Neuron Originates as a Single Structure but May Give Off Many Branches?

Axon

What Are the Gaps in the Myelin Sheath Called?

Nodes of Ranvier

In a Resting Neuron, What Is the Difference in Charges Between the Outside and Inside of the Membrane Called?

Resting Potential

What Happens to a Neuron When the Membrane Becomes More Permeable to Sodium?

The neuron depolarizes.

If a Neuron's Membrane Potential Measures +25mV, the Neuron Is __________.

depolarized

In most neurons, what is the approximate threshold potential?

-55 mV

What Type of Conduction Occurs When an Impulse Jumps From Node to Node Along a Myelinated Axon?

Saltatory conduction

A __________ is defined as a rapid automatic response to a stimulus.

reflex

What Part of the Brain Contains the Thalamus and Hypothalamus, and Processes Sensory Information?

Diencephalon

What Branch of the Autonomic Nervous System Prepares the Body for Stressful or Emergency Situations?

Sympathetic nervous system

Normal, Quiet, Everyday Activities Like Resting and Digesting Are Controlled by Which Division of the Autonomic Nervous System?

Parasympathetic branch

Neurons That Release Acetylcholine Are __________ Neurons; Those That Secrete Norepinephrine Are __________ Neurons.

cholinergic; adrenergic

Which of the Following Axons Would Have the Slowest Conduction Speed?

Unmyelinated, small-diameter axon

Skeletal

Skeletal

Muscular

Muscular

endocrine

endocrine

Blood

Blood

Cardiovascular

Cardiovascular

問題一覧

What is the relative distribution of sodium and potassium ions across a neuronal membrane?

The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell.

During an Action Potential, What Occurs That Results in Depolarization?

Sodium ions diffuse to the inside of the cell membrane.

During an Action Potential, What Occurs That Results in Repolarization?

Potassium ions diffuse to the outside of the cell membrane.

What Part of the Brain Coordinates Voluntary Muscle Movements?

Cerebellum

Where are the cardiac and vasomotor centers located?

Medulla oblongata

The respiratory areas are in the pons and in the __________.

medulla oblongata

What converts environmental information into impulses that are then conducted to the central nervous system?

Sensory receptors

What branch of the peripheral nervous system controls skeletal muscle?

Somatic

What is the structure called that is a branch-like sensory process of a neuron that provides the main receptive surface for communication?

Dendrite

What Part of A Neuron Originates as a Single Structure but May Give Off Many Branches?

Axon

What Are the Gaps in the Myelin Sheath Called?

Nodes of Ranvier

In a Resting Neuron, What Is the Difference in Charges Between the Outside and Inside of the Membrane Called?

Resting Potential

What Happens to a Neuron When the Membrane Becomes More Permeable to Sodium?

The neuron depolarizes.

If a Neuron's Membrane Potential Measures +25mV, the Neuron Is __________.

depolarized

In most neurons, what is the approximate threshold potential?

-55 mV

What Type of Conduction Occurs When an Impulse Jumps From Node to Node Along a Myelinated Axon?

Saltatory conduction

A __________ is defined as a rapid automatic response to a stimulus.

reflex

What Part of the Brain Contains the Thalamus and Hypothalamus, and Processes Sensory Information?

Diencephalon

What Branch of the Autonomic Nervous System Prepares the Body for Stressful or Emergency Situations?

Sympathetic nervous system

Normal, Quiet, Everyday Activities Like Resting and Digesting Are Controlled by Which Division of the Autonomic Nervous System?

Parasympathetic branch

Neurons That Release Acetylcholine Are __________ Neurons; Those That Secrete Norepinephrine Are __________ Neurons.

cholinergic; adrenergic

Which of the Following Axons Would Have the Slowest Conduction Speed?

Unmyelinated, small-diameter axon