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Reil [10]
3 years ago
14

Which of the following muscles is located at the shoulder?

Medicine
1 answer:
olga_2 [115]3 years ago
3 0

Answer:

Pectoralis minor

Explanation:

Pecoralis minor is a thin, triangular muscle lies beneath the pectoralis major muscle. This muscle arises from the third ribs, fourth and fifth ribs.

The pectoralis muscles fans out from the shoulder upper ribs area. This muscle is involved in the coracoid process of scapula. The pectoralis muscle helps in the depression point of the shoulder.

Thus, the correct answer is option (D).

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Explain how neurons communicate. Include a description of the action potential and how the action potential is converted into a
suter [353]

Answer:

Action potentials and chemical neurotransmitters.

Explanation:

Neurons communicate with each other via electrical events called ‘action potentials’ and chemical neurotransmitters.  At the junction between two neurons (synapse), an action potential causes neuron A to release a chemical neurotransmitter.  The neurotransmitter can either help (excite) or hinder (inhibit) neuron B from firing its own action potential.

In an intact brain, the balance of hundreds of excitatory and inhibitory inputs to a neuron determines whether an action potential will result.  Neurons are essentially electrical devices. There are many channels sitting in the cell membrane (the boundary between a cell’s inside and outside) that allow positive or negative ions to flow into and out of the cell.  Normally, the inside of the cell is more negative than the outside; neuroscientists say that the inside is around -70 mV with respect to the outside, or that the cell’s resting membrane potential is -70 mV.

This membrane potential isn’t static. It’s constantly going up and down, depending mostly on the inputs coming from the axons of other neurons. Some inputs make the neuron’s membrane potential become more positive (or less negative, e.g. from -70 mV to -65 mV), and others do the opposite.

These are respectively termed excitatory and inhibitory inputs, as they promote or inhibit the generation of action potentials (the reason some inputs are excitatory and others inhibitory is that different types of neuron release different neurotransmitters; the neurotransmitter used by a neuron determines its effect).

Action potentials are the fundamental units of communication between neurons and occur when the sum total of all of the excitatory and inhibitory inputs makes the neuron’s membrane potential reach around -50 mV (see diagram), a value called the action potential threshold.  Neuroscientists often refer to action potentials as ‘spikes’, or say a neuron has ‘fired a spike’ or ‘spiked’. The term is a reference to the shape of an action potential as recorded using sensitive electrical equipment.

Neurons talk to each other across synapses. When an action potential reaches the presynaptic terminal, it causes neurotransmitter to be released from the neuron into the synaptic cleft, a 20–40nm gap between the presynaptic axon terminal and the postsynaptic dendrite (often a spine).

After travelling across the synaptic cleft, the transmitter will attach to neurotransmitter receptors on the postsynaptic side, and depending on the neurotransmitter released (which is dependent on the type of neuron releasing it), particular positive (e.g. Na+, K+, Ca+) or negative ions (e.g. Cl-) will travel through channels that span the membrane.

Synapses can be thought of as converting an electrical signal (the action potential) into a chemical signal in the form of neurotransmitter release, and then, upon binding of the transmitter to the postsynaptic receptor, switching the signal back again into an electrical form, as charged ions flow into or out of the postsynaptic neuron.

4 0
3 years ago
Tolerance for opioids can develop in as little as __________. Withdrawal symptoms can appear as rapidly as __________ after the
Helga [31]
1. 2-3 days
2. 4-6 hours
6 0
2 years ago
institute of medicine (us) committee on dietary risk assessment in the wic program. dietary risk assessment in the wic program.
puteri [66]

The WIC Program Dietary Risk Assessment examines methods used to determine dietary risk based on non-compliance with dietary guidelines for Program candidates.

The WIC Program Dietary Risk Assessment examines methods used to determine dietary risk based on non-compliance with dietary guidelines for Program candidates.

Special Supplemental Nutrition for Women, Infants and Children (WIC). WIC program applicants must be at nutritional risk to be eligible for program benefits.

Although "dietary risk" is only one of five categories of nutritional risk, it is the most frequently reported by WIC applicants.

This book records that almost all low-income women of childbearing age and children 2 years of age and older are at risk because their diets do not contain adequate amounts.

The Commission recommends that all women and children (2-4 years of age) who meet the eligibility criteria based on income, class, and residency status are also considered to meet the risk requirement.

By assuming that all people who meet the income and classification eligibility criteria are at dietary risk, WIC still has the potential to prevent and correct nutrition-related problems.

Learn more about Dietary Risk Assessment here : brainly.com/question/9951787

#SPJ4

4 0
1 year ago
What determines the way people use their resources
Paul [167]

Answer:

all choices

Explanation:

5 0
3 years ago
Which of the following is a good example of patternicity?
Ket [755]

Of the examples listed, and given the definition of patternicity, we can say that the best example is that of the Constellations. Option A is correct.

Patternicity is a tendency displayed by most humans. It is the tendency to perceive patterns and relate them to otherwise unrelated objects. Some examples of this that are seen commonly are:

  • Constellations
  • Seeing figures in clouds
  • Comparing birthmark shapes to everyday objects

Constellations are groups of stars that we perceive to form a pattern or figure of some kind. There are many constellations and although they have served navigational purposes among others throughout the years, their very existence is an example of patternicity given that each star is individual and has no relation to one another nor the figures we perceive them to form.

To learn more visit:

brainly.com/question/13166871?referrer=searchResults

3 0
3 years ago
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