What is the function and adaptation of a nerve cell?

The sheath acts as an insulator – rather like the plastic coating of an electrical wire. Neurones are adapted to their function by being long, so that they communicate with distant parts of the body. They also have branched endings called dendrites.

Similarly one may ask, what is the job of the nerve cells?

The axon (nerve fibre) transmits electrical signals from the cell body. The dendrites are branching fibres that receive electrical signals from other neurons. The shape of a neuron is determined by the job it does.

What is the function of the nerve ending in a nerve cell?

They also carry signals from the nervous system to effector organs, such as muscles and glands. When neurons are stimulated they transmit an electrical impulse. The nerve ending is branched to make good contact with other neurons or the effector organ. Two neurons do not make direct contact.
Each neuron contains a nerve cell body with a nucleus and organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. Branching off the nerve cell body are the dendrites, which act like tiny antennae picking up signals from other cells.

Why is the nerve cell so long?

Answer: Nerve cells as are usually long and thin because of the need to transmit information between various parts of the body. It is the key unit of the nervous unit and also helps in carrying impulses from the body. – 3.Animal cells usually have irregular shape.

Why is the nerve cell Specialised?

Transmit electrical nerve impulses and so carry information from one part of the body to another ie from receptor to an effector. Specialised Feature: Dendrites extend from the cell body to make connections with other neurones. Have a long axon (nerve fibre) to carry the impulse to the target organ.

What roles do the central and peripheral nervous systems play in the body?

Your spinal cord receives information from the skin, joints and muscles of your body. It also carries the nerves that control all your movements. Your brain is the most complicated part of your nervous system.

What is the myelin sheath and what does it do?

Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.

What is sperm and what does it do?

Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization, a new organism begins developing, starting as a totipotent zygote. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.
Motor neurons transmit electrical impulses from the brain to the rest of the body and are connected to sensory neurons by specialized cells called association neurons.The human body contains millions of nerve cells that transmit electrical impulses almost instantaneously.

How a sperm cell is adapted to its function?

Each type of cell is adapted for its function. outer cell membrane Egg cell – for sexual reproduction. tail head nucleus mitochondria The sperm has a tail to help it move to find the egg. It also has a large number of mitochondria to supply the energy needed for the movement.

What is the function of the head of the sperm cell?

What is the Function of Sperm? A sperm cell consists of two parts, the head and the tail. The overall structure of the sperm makes it perfectly designed to carry out its function. The tail of the sperm helps give it the momentum it needs to reach the egg cell, so it is able to create the embryo in the first place.
Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. The absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: It is a reactant used in photosynthesis.

Why is it important to have a reflex action?

The Importance of Reflexes – Parents With Purpose. A reflex is an involuntary motor response to a sensory stimulus. Reflexes perform many jobs for our central nervous system. They protect us from danger, they help us move our body, they help us see, etc.

What do axons do?

An axon (from Greek ?ξων áxōn, axis) or nerve fiber, is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses known as action potentials, away from the nerve cell body. The function of the axon is to transmit information to different neurons, muscles, and glands.
The palisade cells are the main site of photosynthesis, as they have many more chloroplasts than spongy mesophylls, and also have several adaptions to maximise photosynthetic efficiency; Large Vacuole – Restricts chloroplasts to a layer near the outside of the cell where they can be reached by light more easily.

How does the nervous system allow the body to respond to stimuli?

An animal’s response to a stimulus is coordinated by their central nervous system (CNS). The CNS consists of the brain and the spinal cord. It gathers information about, and responds to, changes in the environment. Receptors respond to a stimulus and send impulses along sensory neurons to the CNS.

How are xylem and phloem adapted to their function?

Xylem transports water and solutes from the roots to the leaves, phloem transports food from the leaves to the rest of the plant. Transpiration is the process by which water evaporates from the leaves, which results in more water being drawn up from the roots. Plants have adaptations to reduce excessive water loss.
The axon (nerve fibre) transmits electrical signals from the cell body. The dendrites are branching fibres that receive electrical signals from other neurons. The shape of a neuron is determined by the job it does.

What is a dendrite and what does it do?

Dendrites (from Greek δένδρον déndron, “tree”), also dendrons, are branched protoplasmic extensions of a nerve cell that propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project.

Why is the nerve cell shaped the way it is?

Nerve cells are shaped like long wires so they can carry messages form one end of the body to the other. Some nerve cells in the brain can keep their information and send out messages for a long time. “B” is a small blood vessel that brings food and oxygen to the nerve cells.

How are the red blood cells adapted to their function?

These specialised cells are like flattened discs, which gives them a much greater surface area with which to exchange oxygen and carbon dioxide in the lungs and with body cells. Red blood cells are able to carry oxygen so efficiently because of a special protein inside them: haemoglobin.