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Biology High School

Explain how the mucoliary elevator helps prevent foreign material from

Explain how the mucoliary elevator helps prevent foreign material from getting into the lungs

2 months ago

Solution 1

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2 months ago

The cilia and mucus in your nose to trap unwanted particles that you breathe in to keep them out of your lungs

📚 Related Questions

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How are fossils helpful in identifying ancestral and derived traits of organisms?

Solution 1

Fossils can give us direct evidence of the character states of extinct lineages. For example, all modern birds lack teeth. Is the lack of teeth an ancestral or a derived condition? If we examine extinct species of theropods we see that they had teeth. Therefore we know that the lack of teeth is a derived condition in modern birds.

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How many synapses are crossed in a single reflex arc during a muscle stretch reflex?

Solution 1

One synapse. In stretch reflex muscle contraction occurs in response to the stretching within muscle. Monosynaptic reflex is the one that provide the action for the skeletal muscles. If the muscles lengthens, the activity of the nerve of muscle spindle increases. This will lead into an increase in alpha motor neuron functions. This will result into muscle fibers to contratc and counters the stretch. Gamma neurons are the one that controls the sensitivity of the stretch reflex.

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In classical conditioning a stimulus that does not bring about a response

Solution 1

Nuetral stimulus does not ring about a response

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Explain the mechanisms for movement of materials across cellular membranes anatomy

Solution 1

There are 2 types of transport mechanisms that involve the movement of materials across the cellular membrane:

1. Passive Transport Mechanisms which is the movement of materials that does not require energy. Instead the movement relies on the permeability of the cell. Under this are three kinds of passive transport mechanisms:

a. Simple Diffusion:
- the movement of materials from a region of higher concentration to lower concentration. No external energy is necessary for the movement. The materials supply the energy themselves.

b. Facilitated Diffusion:
- This differs from simple diffusion because the movement is facilitated by proteins that make up the structure of the membrane. The proteins include channel proteins that allow ions and smaller molecules to cross the membrane. The other protein are the carrier proteins, which bind to materials like sugar molecules and move it across the membrane.

c. Osmosis:
- This is the diffusion of water across the membrane. Osmosis moves water from regions where there are more water molecules of water per volume to regions where there are less water molecules per volume.

2. Active transport on the other hand is a movement mechanism that requires energy. It uses the energy to send materials against the direction it is coming from through simple diffusion. This mechanism is used in a way to keep unwanted ions or other materials out of the cell.

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Which of the following does not lay amniotic eggs? a. Marsupials b. Reptiles c. Birds d. Monotremes

Solution 1

The answer is A) Marsupials Just took the test.

Question

Label the sketch below to explain how a ras mutation leads to cancer

Solution 1

The answers of this question are the following:
(1) a growth factor that binds to
(2) its receptor in the plasma membrane.
The signal is relayed to (3) a G protein called Ras. Like all G proteins, Ras is active when GTP is bound to it.
Ras passes the signal to (4) a series of protein kinases.
The last kinase activities (5) a transcription activator that turns on one or more genes for proteins that stimulate the cell cycle. If a mutation makes Ras or any other pathway component abnormally active, excessive cell division and cancer may result.

Question

Zones in which interpersonal interactions can take place are known as ____.

Solution 1

Zones in which interpersonal interactions can take place are known as proxemics

Edward Hall, a famous anthropologist coined the term ‘Proxemics. He was interested in understanding how humans use space in communication. Thus, proxemics is about the study how humans using space during their communication with others. It is about how close one stand to someone, whether one touches each other and how comfortable we feel are all part of the study of proxemics.

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Identify the region of the humerus that articulates with the ulna. head capitulum medial epicondyle trochlea

Solution 1

The correct answer is the trochlea. The trochlea is a protuberation on the distal humerous that attaches on the trochlear notch of the ulna. The trochlear notch is formed on the proximal head of the ulna; the attachment of the trochlea of the humerus to the trochlear notch forms a hinge joint.

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How many layers of phospholipids make up the plasma membrane?

Solution 1

3 layers

hope I helped

Question

If a hormone-secreting cell is affected by the hormone that it synthesizes, the hormone is said to act in a(n) _______ fashion.

Solution 1

It is called autocrine action. A hormone is a chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. They are essential for every activities of life, including the processes of digestion, metabolism among other activities. There are five types of signalling which include; intracrine, autocrine, juxtacrine, paracrine and endocrine cells.

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