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Igoryamba
3 years ago
7

If you run a marathon, your body will release _____ to elevate your mood and reduce your pain.

Biology
1 answer:
mihalych1998 [28]3 years ago
4 0
B - Endorphins

A and C are incorrect as those are released respectively during a fight or flight stage and during extreme stress.

D is incorrect as that is released when there is not enough oxygen in the muscles.

Hope this helps!
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Scientists were. about whether dolphins could be used as therapy animals
kupik [55]

Answer:

i would say they were skeptical

Explanation:

nobody really knows how test are going to work out, no one knows how intelligent marine life is at first. Im sure a lot of scientist doubted the idea of them being therapy animals

8 0
3 years ago
Discuss the anatomical changes that occurred in the bipedal hominin and how they reflect certain habitat adaptations and then di
ipn [44]
A) Discuss the anatomical changes that occurred in the bipedal hominin
The changes that occurred are the loss of the capability in hands to grasp on branches. This is because of the presence of an opposable thumb. Another change is the loss of walking on 4 legs. The hominids started to have an upright posture, have long legs and walk on their two feet.

b) How they reflect habitat adaptation
The species lived in wooded areas like forests. This is why they required the grasping abilities on their feet and hands to be able to move in the trees while holding branches. Shifting to unwooded areas like the grasslands made them lose some of their abilities. This is because they were no longer needed.

c) Discuss the hypothesis that propose why the change occurred.I
It was necessary for change to occur due to the fact that forests were becoming fragmented and patchy. Food also became dispersed and scarce. This made the species use more energy to get food and also have free hands for them to be able to pick up food. They also gained an upright posture.

d) How can 3D scans and printing be applied to other areas of science.
3D scanning has been used to scan many objects from different museums. It has also been used to identify the age of fosils and artifacts. 3D printing can be used to create prototypes in scientific technology research. It is also used to analyse features of objects.

e) What applications can they have
3D scanning and printing has been applied in architectural surveys to provide accurate measurements increasing on productivity and saving on time. It has also been used in health to create a detailed study of body parts and produce comfortable prosthetic limb for patients.
4 0
3 years ago
Both Duchenne muscular dystrophy and color blindness are caused by recessive alleles. DMD, unlike color blindness, nearly always
Ronch [10]

Answer: Although both are X-linked recessive conditions, and therefore more likely in males, with the single X-chromosome. The recessive allele in colour blindness occurs at a higher frequency in the population and is a mild condition. Thus colour blindness does occur to a lesser extent in females because it needs the double recessive condition. DMD is a severe, disabling condition with a limited lifespan, and recessive allele frequency much lower, so the double recessive condition in females is very rare.

Explanation: DMD is an X-linked recessive, “nearly always in males” suggest that it also occurs due to a new mutation or some rare condition e.g. double recessive from an affected father and carrier mother, or inactivation of the normal gene in a heterozygote. It is also found that the defective allele is not completely recessive and that female carriers may exhibit mild to moderate effects.

colour blindness is polygenic, although the genes are all X-linked. It is more common in males than females. Females can carry two recessive alleles and so express the phenotype, but this is uncommon because the frequency of the recessive gene is low.

There are similarities in that both are X-linked recessives, therefore commonly expressed in males, who only have one X chromosome. The gene frequency of the colour blindness recessive is much higher than that of DMD, so the double recessive condition, which affects females, is more likely to be seen with colour blindness. In addition, DMD is a severe condition associated with disability and limited lifespan, which reduces the probability of mating between an affected male and carrier female

6 0
2 years ago
What are structures that form when magma solidifies beneath Earth surface called ?
zhannawk [14.2K]

Answer:

Intrusive Rock

Explanation:

Intrusive Rock - Igneous rock that forms when magma hardens beneath Earth's surface.

<em>Hope this helps</em>

<em>-Amelia The Unknown</em>

5 0
3 years ago
Explain how messages travel to and from the brain through the nervous system
sweet [91]
<span>Messages to the brain travel along the nerves, which are strings of long thin cells called neurons</span>
4 0
3 years ago
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