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Klio2033 [76]
4 years ago
15

Why is a stimulus required for a muscle to contract?

Biology
1 answer:
Charra [1.4K]4 years ago
7 0
When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
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Physical barriers that help prevent an individual from contracting diseases include __________. a. white blood cells, enzymes, t
Nostrana [21]

Sweat, tears, skin, and mucous membranes are among the physical defenses that keep a person from being sick.

<h3>What causes infectious diseases?</h3>

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2 years ago
What do bears do to survive the winter
Ivahew [28]
Store food but i believe Hibernate
4 0
3 years ago
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A respiratory rate of less than ________ and greater than ________ in cases of trauma are criteria for immediate transportation
vovikov84 [41]

The question is incomplete as it does not have the options which are:

A. 8; 32

B. 10; 29

C. 12; 20

D. 5; 45

Answer:

The correct answer will be option-B

Explanation:

Trauma is the experience caused by the life-threatening events or events which help develop the psychological distress conditions.

The trauma can cause changes in the physiologic and psychological responses in humans. The CDC guidelines have stated criterion for immediate transportation of the person to the trauma centre in which one of the criteria is that if a person has the respiratory rate of less than 10 and greater than 29 will be transported to the trauma centre immediately.

Thus, Option-B is the correct answer.

8 0
3 years ago
The total number of genes present in a population is...
Zielflug [23.3K]
<span>The total number of genes present in a population is called the gene pool. Hope this helps </span>
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The minimal amount of nutrients needed every day by healthy people to prevent nutrient deficiencies is called the
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<span>The minimal amount of nutrients needed every day by healthy people to prevent nutrient deficiencies is called the RDA.
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