Nervous Tissue and Nervous System Overview

<p>They are small and irregularly shaped. (D)</p> Signup and view all the answers

<p>Controls the autonomic nervous system (A)</p> Signup and view all the answers

<p>Sympathetic nervous system (B)</p> Signup and view all the answers

<p>Spinal ganglia contain few blood capillaries. (D)</p> Signup and view all the answers

<p>Increasing peristalsis of the intestine (B)</p> Signup and view all the answers

<p>Scattered nerve fibers (A)</p> Signup and view all the answers

<p>Autonomic nervous system (A)</p> Signup and view all the answers

<p>Regulates activities that are involuntary (D)</p> Signup and view all the answers

<p>Dorsal root ganglia of spinal nerves (C)</p> Signup and view all the answers

<p>Schwann cells (B)</p> Signup and view all the answers

<p>Astrocytes (D)</p> Signup and view all the answers

<p>Axon (C)</p> Signup and view all the answers

<p>Interneurons (C)</p> Signup and view all the answers

<p>The presence of the brain and spinal cord (C)</p> Signup and view all the answers

<p>Endoneurium (B)</p> Signup and view all the answers

<p>Olfactory nerve (D)</p> Signup and view all the answers

<p>Supporting neurons and regulating fluid (D)</p> Signup and view all the answers

<p>Small and irregularly shaped (D)</p> Signup and view all the answers

<p>Few flattened cells known as satellite cells (D)</p> Signup and view all the answers

<p>Cell bodies are grouped in spinal ganglia while scattered in autonomic ganglia (A)</p> Signup and view all the answers

<p>Autonomic ganglia contain more blood capillaries (A)</p> Signup and view all the answers

<p>Responding to emergencies by increasing heart rate (D)</p> Signup and view all the answers

<p>They form organized bundles around the cell bodies (C)</p> Signup and view all the answers

<p>It controls the autonomic nervous system (A)</p> Signup and view all the answers

<p>The cell bodies are pseudounipolar and round (C)</p> Signup and view all the answers

<p>Provide support and protection for neurons (B)</p> Signup and view all the answers

<p>Sensory neurons (C)</p> Signup and view all the answers

<p>It is surrounded by oligodendrocytes in the CNS. (B)</p> Signup and view all the answers

<p>It controls voluntary movements. (B)</p> Signup and view all the answers

<p>Oligodendrocytes (C)</p> Signup and view all the answers

<p>Phospholipids (C)</p> Signup and view all the answers

<p>Optic nerve (A)</p> Signup and view all the answers

<p>Control involuntary bodily functions (A)</p> Signup and view all the answers

<p>A single process that divides into two branches (A)</p> Signup and view all the answers

<p>Neuroglia (C)</p> Signup and view all the answers

<p>Ventral root carries motor fibers; dorsal root carries sensory fibers. (D)</p> Signup and view all the answers

<p>Connective tissue capsule (A)</p> Signup and view all the answers

<p>Nodes of Ranvier (A)</p> Signup and view all the answers

Reacts to stimuli, transmits impulses to organs for responses, and controls body functions.

Made up of neurons (special cells) and neuroglia (supporting cells).

The brain and spinal cord that process information and send commands throughout the body.

Connects the CNS to the rest of the body, includes nerves and ganglia.

Transmits signals from the CNS to muscles or glands (effectors).

Carries information from sensory receptors to the CNS.

Connects sensory and motor neurons within the CNS.

Contains the nucleus and organelles for neuron function.

A neuron with many dendrites and one axon extending from the cell body.

A fatty layer around axons that speeds up nerve impulse transmission.

Clusters of neuron cell bodies located outside the central nervous system, specifically in the spinal cord's periphery. They are crucial for sensory functions.

A type of neuron with a single axon that branches into two extensions, one that senses stimuli and the other that transmits signals to the central nervous system.

Flattened cells surrounding neuron cell bodies in ganglia, providing support and protection.

Groups of neuron cell bodies outside the central nervous system that regulate involuntary functions like heart rate and digestion.

Part of the autonomic nervous system that prepares the body for stressful situations (fight or flight).

Part of the autonomic nervous system that helps the body conserve energy and return to a resting state.

Organs and tissues in the body that function automatically without conscious control.

Part of the brain regulating the autonomic nervous system.

Nerve fibers outside the brain and spinal cord, connecting them to the rest of the body.

The nervous system is responsible for receiving information from the environment, processing that information, and sending signals to direct responses throughout the body.

The nervous system is divided into the central nervous system (CNS) and the peripheral nervous system (PNS).

The somatic nervous system controls voluntary movements, while the autonomic nervous system regulates involuntary functions.

Neurons are specialized cells that transmit electrical impulses throughout the nervous system.

Neuroglia are supporting cells that provide structure and protection for neurons.

Neurons are classified based on their structure (multipolar, bipolar, pseudounipolar) and function (motor, sensory, interneurons).

A multipolar neuron has a cell body, one axon, and multiple dendrites.

The axon hillock is the part of the cell body where the axon originates, lacking Nissle granules.

Dendrites are short, branched processes that receive signals from other neurons.

Axons are long, single processes that carry nerve impulses away from the cell body.

The myelin sheath is a fatty covering around axons that speeds up nerve impulse transmission.

Nodes of Ranvier are gaps in the myelin sheath, where nerve signals jump between segments.

Neuroglia include astrocytes, Schwann cells, oligodendrocytes, microglia, ependymal cells, and satellite cells.

Astrocytes provide structural support, form the blood-brain barrier, and regulate the environment around neurons.

The blood-brain barrier is a protective layer that restricts certain substances from entering the brain.