Which structure in plants allowed the first land plants to survive out of water?

What is affected by the electrical signal sent by the fourth structure of the reflex arc?(This will be the fifth structure in th

Stells [14]

Answer:

The effector organ is affected by the fourth structure of the reflex arc.

Explanation:

When talking about the reflex arc, we refer to the sequence of events that occur for the body to react to an external stimulus.

In general terms, the peripheric nervous system receives information from a stimulus coming from the external environment. This information is sent to the central nervous system, where it is processed. From the CNS, another signal is sent as a response to the stimulus. This mechanism is known as the reflex arc.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

There are three types of neurons involved in the mechanism:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Action:

Ascending branch

The stimulus reaches the body and is received by the specialized sensory receptors. Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy. Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.

Descending branch

Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response. Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.

Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.

8 0

2 years ago

A species of aquarium fish displays differences in stripe patterns as shown in the diagram below

Naddika [18.5K]

Answer:

Clown fish?

Explanation:

Where is the diagram?

8 0

3 years ago

Read 2 more answers

PLEASE HELP ME!!!!!!

sukhopar [10]

Light rays passes through the pupil in the eye and activates the neurons in the retina. The light wavers that are from the reflection of the object are transformed into neural impulses or transduction then action potentials are released when electrical charges are sent through the neurons. Excitatory neurotransmitters are supplied when action potential goes to the axon terminal and the thalamus routes the neural message from the retina elsewhere in the brain. Feature detectors organize the visual projection of the object.

4 0

3 years ago

Sustancia formada por ADN y proteínas histonas que integra los cromosomas

Sauron [17]

Answer:

La cromatina

Explanation:

La cromatina es una sustancia dentro de un cromosoma que consta de ADN y proteína. El ADN lleva las instrucciones genéticas de la célula. Las principales proteínas de la cromatina son las histonas, que ayudan a empaquetar el ADN en una forma compacta que encaja en el núcleo celular.

La cromatina es un complejo altamente organizado de ADN y proteínas y es un componente principal del núcleo celular. Las proteínas histonas ayudan a organizar el ADN en unidades estructurales llamadas nucleosomas, que luego se ensamblan en una estructura compacta (cromatina) y, finalmente, en estructuras muy grandes de orden superior (cromosomas).

8 0

2 years ago

Which of the following factors has delayed the development of laboratory- based genetic systems in Archaea?a.Archaea do NOT host

e-lub [12.9K]

<h2>b) option is correct </h2>

Explanation:

Archaea are the closest modern relatives of Earth's first living cells
Archaea are famous because of living in extreme environments
If it’s super hot (more than 100° Celsius), freezing, acidic, alkaline, salty, deep in the ocean, even bombarded by gamma or UV radiation, there’s probably life there, and that life is probably archaeal species
They’re also considered very resourceful
Many forms of archaea can utilize totally inorganic forms of matter—hydrogen, carbon dioxide or ammonia for example—to generate organic matter themselves

8 0

2 years ago