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Neko [114]
3 years ago
13

People who have done a lot of endurance training can have a resting heart rate of 50 beats per minutecompared to the normal rest

ing heart rate of 70-80 beats per minute. This decreased heart rate in trainedindividuals is the partly result of:
A) endorphins released from the brain which have an inhibitory effect on heart rate.

B) parasympathetic activity becoming more active and sympathetic activity becoming less active at rest.

C) decreases in both sympathetic and parasympathetic activity.

D) sympathetic activity becoming more active and parasympathetic activity becoming less active at rest.

E) increases in both sympathetic and parasympathetic activity
Biology
1 answer:
rjkz [21]3 years ago
6 0
<h2>B) is the correct option </h2>

Explanation:

The parasympathetic activity is responsible for the body's rest and digestion response when the body is relaxed, resting, or feeding, it basically undoes the work of sympathetic division after a stressful situation

The parasympathetic activity decreases respiration and heart rate and increases digestion

Increased sympathetic activity plays an important role in patho-physiological role in hypertension, particularly in the early stages which is evident by  increased heart rate and blood pressure variability

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Han takes a shower in his family’s new apartment. He gets the water perfect—not too hot, because that hurts! Then Han hears his
tester [92]

Answer:

  1. Unconditioned stimuli, US: getting hurt by hot water.
  2. Conditioned stimulus, CS: hearing a toilet flush.
  3. Unconditioned response, UR: feeling pain after hurting.
  4. Conditioned response, CR: being afraid when hearing a toilet flush.

Explanation:

  • Unconditioned stimuli: Biologically significant stimuli that provoke an unlearned or reflex reaction. For example, getting hurt by hot water.
  • Conditioned stimuli: neutral, innocuous or biologically not significant stimuli. For example, hearing a toilet flush.
  • Unconditioned Responses: Unlearned response that is triggered by reflex because of an unconditioned stimulus. For example, feeling a lot of pain after hurting by hot water.
  • Conditioned Responses: These are provoked by conditioned stimuli. This refers to a learned response that reflects the association between conditioned and unconditioned stimuli. For example, being afraid when hearing a toilet flush.

Initially, an unconditioned stimulus does not provoke any response, but after enough exposition to conditioned and unconditioned stimuli together, the simple presence of unconditioned stimuli induces conditioned responses. In this aspect, the subject has learned to predict or to anticipate the unconditioned stimulus.

5 0
3 years ago
Which of the following accurately describes nutrient limitation?
Studentka2010 [4]
When an ecosystem has a scarce nutrient, that is when there is a nutrient limitation.

So the answer is C. <span>Nitrogen is typically the limiting nutrient in freshwater environments.

This is because Nitrogen is the "scarce" nutrient </span>
6 0
4 years ago
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts,
Naya [18.7K]

Answer:

D

Explanation:

D. The second cell would not be able to produce as much food because it could not capture sunlight.

6 0
4 years ago
the genes stc1 and stc2, which share a common ancestor, are found in both zebrafish and humans. all four stc genes display simil
Temka [501]

Based on these facts, we can state that the genes of the two organisms had a eukaryotic origin.

We can arrive at this answer because:

  • Despite having exons, prokaryotes do not have introns in their genomes.
  • This means that if two organisms have the same sequence of introns and exons, they have a common ancestor, in addition to having their genes originated in a eukaryotic organism, which explains the sequence of introns.

This means that the genetic expression of these two organisms has similarities, even if they are organisms with different biological processes.

More information:

brainly.com/question/3641593?referrer=searchResults

5 0
2 years ago
One effect of uncontrolled diabetes is that the blood might develop an acidic pH. As a result, cells may not be able to regulate
AfilCa [17]
The process is called denaturation.
I hope this helped :)
6 0
3 years ago
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