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stepladder [879]
2 years ago
9

1.0X10 to the negative 7th power mg

Biology
1 answer:
Over [174]2 years ago
6 0

Answer:

1.0 × 10-7 milligrams

Explanation:

1.0 × 10-7 milligrams

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Explain why humans need a circulatory system to transport oxygen, while single-celled organisms like the amoeba do not.​
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Answer: Single cell organisms dont need a respiratory system because oxygen and carbon-dioxe diffuses between their body tissues and the enviorment.

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Is a process that involves one division of the nucleus and results in two identical cells.
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Mitosis

Explanation:

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Brain cells that are neither neurons nor glia, but which are capable of dividing and then differentiating into neurons or glia,
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ANSWER:

Brain cells that are neither neurons nor glia, but which are capable of dividing and then differentiating into neurons or glia, are called NEURAL STEM CELLS.

EXPLANATION:

Neural stem cells are undifferentiated cells originating in the central nervous system.

Neural stem cells (NSCs) have the potential to give rise to the radial glial progenitor cells that grow and differentiate into neurons and glial cells.

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A NEURON (nerve cell) is a specialized cell that conveys electrochemical impulses throughout the body.

provide support for and insulation between them.

GLIAL CELLS are the most abundant cell types in the central nervous system. Types of glial cells include oligodendrocytes, astrocytes, ependymal cells, Schwann cells, microglia, and satellite cells.

8 0
3 years ago
In a common reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, where does the sign
kobusy [5.1K]

In a reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron. The answer is motor neurons.

<h3>What is the reflex arc?</h3>

The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts.

In general terms,

1) A stimulus of varying nature reaches the body.

2) The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-.

3) The CNS processes the information and sends another signal as a response to the stimulus.

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

The neurons involved in the mechanism are:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Mode of Action:

  • <u>Ascending branch</u>

The stimulus reaches the body and is received by the specialized sensory receptors.

Afferent neurons, placed in the dermis and epidermis, receive this information from receptors, react and send it to the central nervous system as nerve impulses.

  • <u>Descending branch</u>

Interneurons in the CNS, process the information and send a motor response.  

Efferent neurons carry the response from the CNS to the effector organs, which might be either a muscle or a gland.

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

A motor neuron is formed by a cellular body, dendrites (cytoplasmic extensions that receive stimuli from other cells), and a long axon that is capable of conducting the electrochemical signals.

The axon brunches out into several extensions when it approaches the muscle.

At the end of each brunch, the axon is inserted in the muscle fiber surface, composing neuromuscular join.

This is the last part of the NS involved in the process before the muscle contracts.

After a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron, and from there to the effector.  

The corrct answer is motorneuron.

You can learn more about the reflex arc at

brainly.com/question/894334

#SPJ1

3 0
1 year ago
A student notices that her guppies reproduce most when her fish tank water is slightly alkaline. They stop reproducing if the wa
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Answer:

The correct answer is Zones of tolerance

Explanation:

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