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Lerok [7]
3 years ago
14

1.How would you differentiate your heart rate before and after exercising?

Biology
2 answers:
KATRIN_1 [288]3 years ago
8 0
Your heart rate before exercising would probably be the at rest rate of say about 50-60 beats per minute whereas immediately after exercise it could easily be say 115-130 and depending on age there is an optimum heart rate for each age range which decreases somewhat with age. Timing for a full minute your heart rate is best as it will give the actual count whereas if you just do it for 10 seconds and then multply by 6  it would assume it will be consistent whereas it could decrease during the minute so the actual measured count for a full minute is more accurate.
sergeinik [125]3 years ago
6 0

Answer 1: You can differentiate your heart rate before and after exercise by taking your pulse.

Explanation:

In order to find the pulse rate, place your index and middle finger together at your wrist joint between the bone and also the connective tissue over your arterial blood vessel ,which is found on the thumb facet of your wrist joint. You would feel the pulse, then start counting the amount of beats in fifteen seconds. After that times it by 4 to get the pulse rate per minute.

____________________________________________________________

Answer 2: The advantage of timing your pulse for a full minute is you get your pulse exactly beats per minutes vs an estimate.

Explanation:

Normally pulse rate is calculated for 15 seconds and then multiplied by 4. But this case may lead to inaccuracy, as the pulse rate may vary over the time period of one minute. therefore, it is best to find the number of beats per minute instead of 15 seconds.

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Why do you need to find the mass of an empty cylinder? please help
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Explanation:

An empty graduated cylinder has a mass of 34.90 g. The cylinder is filled to the 9.40 mL mark with a liquid. The mass the cylinder with liquid is found to be 47.99 g. What is the density of the liquid?

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47.99

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34.90

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3 0
2 years ago
Which natural selection condition example can be classified as over production of offspring?
Tatiana [17]
Natural selection is the process by which individuals with characteristics that are advantageous for reproduction in a specific environment leave more offspring in the next generation, thereby increasing the proportion of their genes in the population gene pool over time. Natural selection is the principal mechanism of evolutionary change, and is the most important idea in all biology. Natural selection, the unifying concept of life, was first proposed by Charles Darwin, and represents his single greatest contribution to science.

Natural selection occurs in any reproducing population faced with a changing or variable environment. The environment includes not only physical factors such as climate or terrain, but also living factors such as predators, prey, and other members of a population.

Mechanism of Natural Selection

The mechanism of natural selection depends on several phenomena:

• Heredity: Offspring inherit their traits from their parents, in the form of genes.

• Heritable individual variation: Members of a population have slight differences among them, whether in height, eyesight acuity, beak shape, rate of egg production, or other traits that may affect survival and reproduction. If a trait has a genetic basis, it can be passed on to offspring.

• Overproduction of offspring: In any given generation, populations tend to create more progeny than can survive to reproductive age.

• Competition for resources: Because of excess population, individuals must compete for food, nesting sites, mates, or other resources that affect their ability to successfully reproduce.

Given all these factors, natural selection unavoidably occurs. Those members of a population that reproduce the most will, by definition, leave more offspring for the next generation. These offspring inherit their parents' traits, and are therefore also likely to succeed in competition for resources (assuming the environment continues to pose the same challenges as those faced by parents). Over several generations, the proportion of offspring in a population that are descended from the successful ancestor



Uloborid spider eggs and spiderlings. In any given generation, populations tend to create more offspring than can survive to reproductive age.

increases, and traits that made the ancestor successful therefore also increase in frequency. Natural selection leads to adaptation, in which an organism's traits conform to the environment's conditions for existence.

5 0
2 years ago
A small branch of the optic nerve, known as the ____ path extends directly from the retina to the scn.
svetoff [14.1K]

Answer;

Retinohypothalamic path


A small branch of the optic nerve, known as the retinohypothalamic path extends directly from the retina to the SCN.


Explanation;

The SCN is an abbreviations for suprachiasmatic nucleus or nuclei; which is a region in the hypothalamus. that is responsible for controlling circadian rhythms.

Retinohypothalamic path is a neural input pathway that extends directly from the retina to the SCN.


7 0
2 years ago
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