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s2008m [1.1K]
2 years ago
9

Which area of the brain controls the heart rate, digestion, and breathing? brain stem diencephalon limbic system cerebellum

Biology
2 answers:
Alina [70]2 years ago
6 0

Answer:

Medulla – The primary role of the medulla is regulating our involuntary life sustaining functions such as breathing, swallowing and heart rate. As part of the brain stem, it also helps transfer neural messages to and from the brain and spinal cord. It is located at the junction of the spinal cord and brain.

Explanation:

Nuetrik [128]2 years ago
6 0

Answer:

Medulla – The primary role of the medulla is regulating our involuntary life sustaining functions such as breathing, swallowing and heart rate. As part of the brain stem, it also helps transfer neural messages to and from the brain and spinal cord. It is located at the junction of the spinal cord and brain.

Explanation:

Another brain part that's small but mighty is the brain stem. The brain stem sits beneath the cerebrum and in front of the cerebellum. It connects the rest of the brain to the spinal cord, which runs down your neck and back.

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What are the two main functions of mitosis?
Nikolay [14]

Mitosis helps in the growth by means of hyperplasia. It also helps in reproduction in single celled organisms.

Neuron and Red Blood Cells doesn't undergo cell division once formed.

Osteoblasts help in forming new bones and joining old ones after there's a fracture in bone.

<h3><u>Explanation:</u></h3>

Mitosis is the process by which a cell divides into two daughter cells. It helps in growth of multicellular organisms as well as reproduction in single celled organisms.

The Red blood cells are formed from the bone marrow megakaryocytes and never undergo mitosis. Same are the neurons which are formed from stem cells and never undergo cell division.

The osteoblasts come into action as the bone breaks. They diposit new calcium compounds between the broken part of bones. This leads to irregular growth of bones between them which is then remoulded and brought back to shape by osteoclasts and osteocytes.

4 0
3 years ago
After fertilization a zygote forms. The cells then go through mitosis. Explain how this bundle of cells eventually forms a human
yaroslaw [1]

Answer:

Human fertilization and development

Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.

Stages of human development

Zygotic stage: The zygote is formed when the male gamete (sperm) and female gamete (egg) fuse.

Blastocyst stage: The single-celled zygote begins to divide into a solid ball of cells. Then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother's uterus.

Embryonic stage: The major internal organs and external features begin to emerge, forming an embryo. In this stage, the heart, brain, and spinal cord become visible. Arms and legs start to develop.

Fetal stage: Once the formed features of the embryo begin to grow and develop, the organism is considered a fetus. Differentiation and specialization of structures happens during this time.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Development overview showing the progression from zygote to blastocyst to embryo to fetus.

Differentiation and apoptosis

During development, the number of cells must increase through division so that body axes, tissues, organs, and structures must form. Individual cells become specialized in their structure and function through the process of cell differentiation.

Unnecessary cells also must be removed in order to help form important structures. This occurs is through the process of apoptosis. For example, human hands start out as a paddle-like block of tissue. Eventually, the block was “carved” into fingers by apoptosis of the cells in between the developing fingers.

Microscope images from a scientific paper, showing a developing mouse paw. The cells between the developing digits are stained by a marker that indicates apoptotic cells.

Explanation:

8 0
3 years ago
What are three limiting factors of photosynthesis?
Assoli18 [71]

Answer:

Temperature

Light intensity

Carbon dioxide concentration

Explanation:

The only three things required for successful photosynthesis is access to the right level of warmth, sunlight and carbon dioxide.

8 0
2 years ago
An individual heterozygous for each of five genes (AaBbCcDdEe) is crossed with another individual who has the same genotype. a.
natima [27]

Answer:

32 different gametes can be produced

Explanation:

The possibilities of formation of the number of different gametes in a population are determined by the number of heterozygous alleles for a given gene in the organism.

The formula to calculate the number of gametes is- 2ⁿ where n represents the number of heterozygous alleles

In the given question, the five genes of the organism are considered which form five type of heterozygous allele like A, a, B,b and so on. Therefore five types of heterozygous alleles is possible.

So using the formula we have 2⁵= 32 gametes.

Thus, 32 gametes is correct.

5 0
3 years ago
Read 2 more answers
What is different concerning the dna in bacterial cells as opposed to eukaryotic cells?
-BARSIC- [3]
What is different concerning the DNA in bacterial cells as opposed to eukaryotic cells
o The amount of DNA present, whether the DNA is housed in a nucleus or not, and whether the DNA is linear or circular
• Which of these statements is true regarding cell division in the body of a growing teenaged human?
o Only a subset of cells is dividing at this point o We grow by cell division, but not all of our cells are dividing
• Dividing cells must copy their DNA
( replication ), segregate DNA and other cellular components during
( mitosis ) and split apart during
( cytokinesis)
• Our chromosomes exist as many sets of similar pairs with the EXCEPTION of our sex chromosomes o the sex chromosomes of the human female are also pairs. It is the X and Y of the male that break this rule •

6 0
3 years ago
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