nervous coordination test 3

The dendrite primarily functions to conduct nerve impulses towards the cell body, making the correct answer B, "Towards".

Humans are generally recognized to have five distinct senses: vision, hearing, smell, taste, and touch.

Thus, the correct answer is A, "5".

The axon's primary function is to convey nerve impulses away from the cell body, making the correct answer A, "Away from".

Pumps are specifically involved in active transport processes, which require energy to move substances against a concentration gradient.

Thus, the correct answer is B, "Pumps".

Sensory neurons, also known as afferent neurons, carry information from sensory receptors towards the central nervous system.

Given these roles, the correct answer is D, "Central nervous system".

The brain is the central hub for nervous coordination within the body, processing and interpreting sensory information and deciding appropriate responses.

Therefore, the correct answer is D, "Brain".

Associative neurons, also known as interneurons, are typically multipolar and interconnect with other neurons within the brain and spinal cord.

Therefore, the correct answer is C, "Multipolar".

The conduction of an action potential can occur in different ways depending on the type of neurons.

In non-myelinated neurons, the conduction is continuous along the length of the neuron. This is known as continuous impulse conduction.

On the other hand, in myelinated neurons, the action potential jumps from one node of Ranvier to the next. This is known as saltatory impulse conduction.

Therefore, the correct answer is B, "Saltatory impulse conduction".

The mammalian forebrain differentiates into several structures.

Among these, the cerebrum, thalamus, and limbic system are key components.

Thus, the correct answer is B, "Cerebrum".

Different regions of the brain are responsible for different functions.

The speech center, responsible for the control of muscles that produce speech and the understanding of spoken and written language, is located in the cerebrum.

Therefore, the correct answer is D, "Cerebrum".

Meninges are the three layers of protective tissue that surround the brain and spinal cord.

The three layers include the Dura mater (outermost layer), Arachnoid (middle layer), and Pia Mater (innermost layer).

Cerebrospinal fluid is present between the Pia Mater and Arachnoid mater.

Therefore, the correct answer is D, "All of the above".

Neurons, the fundamental units of the nervous system, have several defining characteristics.

All neurons have a cell body that contains a nucleus.

While many neurons have features like a myelin sheath, nodes of Ranvier, and Schwann cells, these are not universal to all neurons. For instance, not all the neurons in the CNS have a myelin sheath.

Therefore, the correct answer is A, "A cell body which contains a nucleus".

Various sensations such as tingling, pricking, or numbness of the skin are symptomatic of different conditions relating to nerve damage.

Such sensations are often referred to as Paresthesia.

Paranoia is a psychological condition and is not caused by nerve damage.

Therefore, the correct answer is C, "Paresthesia".

The thickness of neuron fibers plays a crucial role in impulse conduction.

Thicker neuron fibers reduce resistance to nerve impulses, thereby increasing the speed of nerve impulses.

Thus, the correct answer is B, "Speeds up impulse".

The myelin sheath, which insulates neurons, is composed predominantly of lipids (about 80%) and proteins (about 20%).

Therefore, the correct answer is C, "Lipids".

Meissner Corpuscles are specialized for touch sensation, making them responsible for detecting touch.

Therefore, the correct answer is A, "Meissner Corpuscle".

Rod cells function in low light conditions, while Cone cells are active in bright light. Both are involved in light detection.

Therefore, the correct answer is C, "Both A and B".

Schwann cells contribute to the formation of the Myelin Sheath, which insulates neurons and aids in impulse conduction.

Therefore, the correct answer is D, "Production of Myelin Sheath".

In a polarized state, the outer surface of a neuron's membrane is more positive compared to the inner surface.

Therefore, the correct answer is A, "Polarized state".

The forebrain includes the Cerebrum, Thalamus, and Hypothalamus, which are instrumental in processing and integrating information.

Hence, the correct answer is A, "Cerebrum, Thalamus, Hypothalamus".

In a cross-section of the spinal cord, you can observe an inner gray matter surrounded by outer white matter.

Therefore, the correct answer is B, "Inner gray matter and outer white matter".

Different parts of the axon have specific names and functions.

The non-myelinated segment between two Schwann cells is called the Node of Ranvier, which plays a key role in nerve impulse conduction.

Thus, the correct answer is D, "Node of Ranvier."

In neurological terms, a nerve has a specific definition and structure.

It is fundamentally a bundle of either axons or dendrites, but it is also encompassed by connective tissue.

As such, the correct answer is D, "Bundles of either Axons or Dendrites enveloped by connective tissue."

Neurons conduct signals via specific electrochemical processes.

One of these processes is the transmission of a wave of electrochemical change, better known as a nerve impulse.

Consequently, the correct answer is C, "Nerve Impulse."

The spinal cord, an integral part of the central nervous system, has specific dimensions.

In humans, it is approximately 18 inches in length.

Therefore, the correct answer is C, "18 inches."

Different kinds of cells perform various roles within the nervous system.

Neuroglial cells are a specific class of cells providing developmental, physiological, and metabolic support to neurons.

Therefore, the correct answer is C, "Neuroglial cells."

Organisms interact with their environment by detecting and responding to various changes.

In this context, any change that an organism can detect is referred to as a stimulus.

Thus, the correct answer is A, "Stimulus."

Neurons respond to stimuli based on their strength.

A stimulus that is strong enough to elicit an electrochemical change or excite a tissue is known as a threshold stimulus.

Therefore, the correct answer is B, "Threshold stimulus."

The sense of touch is referred to as tactician.

Therefore, the correct answer is B, "Tactician."

Filiform papillae, despite being cone-shaped and ubiquitous across the tongue, do not contain any taste buds.

Therefore, the correct answer is A, "Filiform Papillae."

Nociceptors are specialized to detect pain signals.

Thus, the correct answer is C, "Pain."

Meissner capsules are primarily responsible for touch sensation.

Hence, the correct answer is D, "Touch."

The vestibular mechanoreceptors are responsible for maintaining our body's balance.

Thus, the correct answer is C, "Mechanoreceptor."

The collection of neuron cell bodies is referred to as ganglia.

Therefore, the correct answer is C, "Ganglia."

Sodium pumps expel Na+ into the extracellular fluid (ECF) and intake K+ from the cytoplasm against the concentration gradient.

Therefore, the correct response is A, "Expelling of Na+ into ECF and intake of K+ from cytoplasm against concentration gradient."

Different brain structures have different roles in memory function.

The hippocampus is associated with both short- and long-term memory storage.

Consequently, the correct answer is B, "Hippocampus."

Neurons are the structural and functional units of the nervous system.

They are principally composed of dendrites, an axon, and a cell body.

As a result, the correct answer is B, "Dendrites, axon, and cell body."

The Sodium-Potassium pump is critical for maintaining the membrane potential in neurons.

For every two potassium ions (K+) that are actively transported into the cell, three sodium ions (Na+) are pumped out.

Therefore, the correct answer is C, a 3:2 ratio.

The human body has various types of receptors, each designed to detect a specific type of stimulus.

Nociceptors are specialized in detecting pain signals.

Consequently, the correct answer is C, "Nociceptors."

Neurological communication involves changes in the electrical potential of neuron cell membranes.

When a neuron is not transmitting any signal, its membrane maintains a 'resting potential.'

Accordingly, the correct answer is A, "Resting membrane potential."

Reflex actions are automatic, involuntary responses to specific stimuli.

The pathway that a nerve impulse takes during a reflex action is unique and is referred to as a 'reflex arc.'

As such, the correct answer is C, "Reflex Arc."

Ionic concentration gradients play a significant role in the function of nerve cells.

The concentration of potassium (K+) in the fluid inside a nerve cell is 30 times greater than on the outside.

Hence, the correct answer is C, "30 Times."

The body is equipped with parts that are specialized for receiving stimuli from both internal and external environments.

These include receptors, which receive the stimuli, and transducers, which convert the stimuli into signals that can be processed.

Therefore, the correct answer is D, "Both A and B."

The cell body or soma of a neuron contains several components essential for its function.

Among these components are clusters of ribosomes associated with the rough endoplasmic reticulum, known as Nissl's granules.

Therefore, the correct answer is C, "Nissl's Granules."

The nervous system can be subdivided into pathways based on the direction of the flow of information.

Efferent or motor neurons carry impulses away from the central nervous system (CNS) to the effectors.

Consequently, the correct answer is B, "Efferent."