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Masja [62]
3 years ago
5

Veins have a much lower blood pressure than arteries. What prevents backflow of blood in veins?

Biology
1 answer:
pentagon [3]3 years ago
4 0
Having traveled through the arteries and capillaries, the blood have already lost considerable amount of pressure when it is to travel through the veins. The veins are composed of one-way valves as when the veins are squeezed, it pushes the blood to the valves. 
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A group of students are reviewing material in preparation for a test on the male and female breasts. The students demonstrate un
lora16 [44]

Answer:

Option (C).

Explanation:

Breast are the two prominences present on the upper region ventrally, present in the primates. These breast serve for the mammary gland. The estrogen and growth hormone causes breast development in females.

The primary function of the female breast is the production of milk by the process of lactation. These breast are used for feeding the young ones. The blood vessels are present in abundant supply in he breast.

Thus, the correct answer is option (C).

7 0
3 years ago
Why doesn't the cell membrane pinch in to divide the cytoplasm telophase in plant cells
8_murik_8 [283]
Plant cells have walls that arent very flexible, so a plate forms in between the cells, and the cell splits in half.
7 0
3 years ago
While studying the function of a G protein-coupled receptor you develop a modified GTP molecule that has the same binding capabi
laila [671]

<u>Answer:</u>

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

  • ADH: production of this hormone causes kidneys to retain more water inside body.
  • GHRH: release growth factors and stimulates growth of organism.
  • ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc
  • TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.
  • LH: Stimulate follicle maturation and formation of ovules in women.
  • Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.
  • Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.

<u>Explanation:</u>

Background Knowledge:

GPCR (G Protien coupled receptors) are present inside plasma membrane in huge amount. As name suggest that these receptors are coupled with G proteins during their inactive state present inside of the cell. During their Inactive state these G proteins are bounded with GDP molecule.

Upon receiving signal molecules from outside of cell alters the shape of GPCR. These receptors also triggers change in G Protein, as a result of this GTP get attached with them. This protein further activates reaction cascades inside of the cell.

What happen if GTP cannot be hydrolyzed to GDP + Pi?

If GTP cannot hydrolyzed in to GDP + Pi than, it cannot be able to dissociate from G proteins. Cascade system doesn't stop and produces many effects on body.

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

  • ADH: production of this hormone causes kidneys to retain more water inside body.
  • GHRH: release growth factors and stimulates growth of organism.
  • ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc
  • TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.
  • LH: Stimulate follicle maturation and formation of ovules in women.
  • Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.
  • Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.
7 0
3 years ago
What is the relationship between a consumer and photosynthesis?
amm1812

Answer:

Photosynthesis is the process by which green plants prepare their own food. They prepare their own food because they have chlorophyll in them.

Example: green plants like flowering plants, red algae, etc..

Consumers are the organisms that consume this food prepared by the plants. They cannot prepare food by itself. They don't have chlorophyll so they cannot prepare their own food.

Example: human, animals, plants that does not have chlorophyll, etc..

Hope this helps u

and have a great day ahead

:)

8 0
3 years ago
What kind of sugars do both ADP and ATP share?
ololo11 [35]
Glucose + ATP -----> glucose~P + ADP
5 0
3 years ago
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