What term describes the concentration of nervous tissue at the anterior end of an animal's body?

At the same time, the major integrating areas became concentrated toward the anterior end of the animal's body, a trend called cephalization (from a Greek word for “head”).

1. In which part of an animal body nervous tissue is found?
2. What is the structure of nervous tissue in animals?
3. What is the term cephalization?
4. What is central nervous system of animals?
5. What is sympathetic and parasympathetic?
6. What are the different glial cells found in nervous tissues?
7. How does the action due to nervous tissue in animals?
8. How does nervous tissue explain the structure of the neuron with a diagram?
9. What is the main characteristic of nervous tissue quizlet?
10. What is a Cephalized nervous system?
11. Are crustaceans Cephalized?
12. Are all bilateral animals Cephalized?
13. What is the sympathetic nervous system in dogs?
14. How did animals differ in nervous system?
15. What is sensory and motor mechanism of animals?

In which part of an animal body nervous tissue is found?

Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities.

What is the structure of nervous tissue in animals?

Structure. Nervous tissue is composed of neurons, also called nerve cells, and neuroglial cells. Four types of neuroglia found in the CNS are astrocytes, microglial cells, ependymal cells, and oligodendrocytes. Two types of neuroglia found in the PNS are satellite cells and Schwann cells.

What is the term cephalization?

cephalization, the differentiation of the anterior (front) end of an organism into a definite head. ... Some groups of organisms show full cephalization, but because their bodies are not divided into distinct trunks and heads, they cannot be said to possess a distinct anatomical head.

What is central nervous system of animals?

The central nervous system includes the spinal cord and the brain. The brain is divided into 3 main sections—the brain stem, which controls many basic life functions, the cerebrum, which is the center of conscious decision-making, and the cerebellum, which is involved in movement and motor control.

What is sympathetic and parasympathetic?

The autonomic nervous system comprises two parts- the sympathetic and parasympathetic nervous system. The sympathetic nervous system activates the fight or flight response during a threat or perceived danger, and the parasympathetic nervous system restores the body to a state of calm.

What are the different glial cells found in nervous tissues?

There are three types of glial cells in the mature central nervous system: astrocytes, oligodendrocytes, and microglial cells (Figure 1.4A—C).

How does the action due to nervous tissue in animals?

The nervous tissues in animals act by responding to external and internal stimuli through electrical signals conducted by chemicals called neurotransmitters, which triggers action potentials which initiate the responses to the stimuli.

How does nervous tissue explain the structure of the neuron with a diagram?

Nervous tissue are found in the brain and spinal cord. ... Neurons are the structural units of the nervous tissue. These space cells are specialised for the conduction of impulse is over great distances at great speed. All neurones have a cell body called cyton, several dendrites, and an axon.

What is the main characteristic of nervous tissue quizlet?

Nervous tissue is characterized as being excitable and capable of sending and receiving electrochemical signals that provide the body with information. Two main classes of cells make up nervous tissue: the neuron and neuroglia (Figure 4.5.

What is a Cephalized nervous system?

Key Takeaways: Cephalization

Cephalization is defined as the evolutionary trend toward nervous system centralization and the development of a head and brain. ... Sense organs or tissues are concentrated on or near the head, which is at the front of the animal as it moves forward.

Are crustaceans Cephalized?

The evolutionary trend in cephalization is that more advanced organisms have a larger concentration of neurons at one end of their body. ... Flatworms began to show cephalization, and arthropods (crustaceans, insects, and spiders), annelids (earthworms), and chordates (including humans) have all undergone cephalization.

Are all bilateral animals Cephalized?

Cephalization in the Animal Kingdom

They also have a fairly advanced degree of cephalization, with sense organs (photosensory and chemosensory cells) and a brain concentrated at the anterior end. Consequently, scientists believe that cephalization characterized all bilaterally symmetrical animals from their origins.

What is the sympathetic nervous system in dogs?

In short, it's a system that neither you nor your dog has much conscious control over. When faced with a stressor, the sympathetic nervous system releases a flurry of hormones to boost the body's alertness including adrenaline and noradrenaline. It quickens the heart and breathing rate.

How did animals differ in nervous system?

Diversity of Nervous Systems

All animals have a true nervous system except sea sponges. Cnidarians, such as jellyfish, lack a true brain but have a system of separate but connected neurons called a nerve net. Echinoderms, such as sea stars, have neurons that are bundled into fibers called nerves.

What is sensory and motor mechanism of animals?

Sensory-motor mechanisms. At this level of analysis, questions concern the physiological machinery underlying an animal's behaviour. Behaviour is explained in terms of the firings of the neural circuits between reception of the stimuli (sensory input) and movements of the muscles (motor output).