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3 years ago

Decide whether each statement about hormones is true or false.

Biology

2 answers:

lianna [129]3 years ago

6 0

Answer:

True - Homeostasis is regulated by two systems; the nervous system and the endocrine system.

False - Hormones released by the endocrine system are secreted through ducts.

The endocrine glands release hormones directly into the blood.

False - Steroid hormones bind to receptors on the surface of a cell.

The steroid hormones bind to nuclear receptors after they diffuse across the plasma membrane.

True - Hormones affect almost all cells and processes.

The effect of hormones are widespread and diverse. They control and integrate major processes in the body such as reproduction, development, the mobilization of the immune system etc.

False - Peptide hormones travel to the nucleus of a cell.

Peptide hormones never enter the target cell, They bind to a an external receptor on the membrane surface.

Novosadov [1.4K]3 years ago

6 0

Answer:

in order

Explanation:on edg 2020

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Free nucleotides must be available in a cells nucleus to produce mrna strands. where do these free nucleotides come from

iren [92.7K]

All four nucleotides (adenine, guanine, thymine, cytosine) are synthesized in the liver. The nucleotides can be synthesized de novo or recycled through salvage pathways. The synthesis occurs in the cytoplasm of the cell, not within a specific organelle. The components which are used for the nucleotide synthesis are derived from biosynthetic precursors of carbohydrate and amino acid metabolism, and from ammonia and CO2.

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3 years ago

Cell engulfs molecules in cell "drinking":

RSB [31]

These are the following answers to the items

cell engulfs molecules in cell "drinking": pinocytosis

molecules helped by protein; move insoluble molecules across plasma membrane: facilitated diffusion

molecules move in and out freely from high to low concentration: passive diffusion

cell engulfs microorganisms in cell "eating": phagocytosis

molecules "pumped" in or out from low to high concentration: active transport

oxygen, carbon dioxide: passive diffusion

transports sodium, potassium: active transport

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3 years ago

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

evablogger [386]

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4 years ago

In general, the largest component of bog soils is . A. water. . . B. organic matter. . . C. air. . . D. living organisms. .

babymother [125]

Bog soils are type of soils which are poorly drained type that are found on top of peat ( topmost coal) and under a swamp environment. Although, these types are watery in nature, there is still a high percentage of organic matter in them like ordinary soils. Hence the answer is B. organic matter

5 0

3 years ago

1. Walking through the forest, you find a large population of toadstools. From your extensive knowledge of the kingdom fungi, yo

Lena [83]

Answer:

No, observed and expected frequencies are different.

Observed frequencies: p2 = 0.56 , 2pq = 0.375, q2 = 0.062

Expected frequencies: p2 = 0.774 , 2pq = 0.211, q2 = 0.014

Explanation:

Given frequency of recessive genotype (q2)= 14/ 1006 = 0.0139

Frequency of recessive allele s (q) = square root of 0.0139 = 0.12

Frequency of dominant allele S (p) = 1-q = 1-0.12 = 0.88

Expected frequency of homozygous recessive genotype = 0.12 x 0.12 = 0.014

Expected frequency of homozygous dominant genotype = 0.88 x 0.88 = 0.774

Expected frequency of heterozygous dominant genotype = 2pq = 2 x 0.88 x 0.12 = 0.211

Observed frequencies in population 2

Observed frequency of homozygous dominant genotype = 308 / 549 =0.56

Observed frequency of heterozygous dominant genotype = 206 / 549 =0.375

Observed frequency of homozygous recessive genotype = 34 / 549 =0.062

Observed frequencies do not match with expected frequencies.

6 0

3 years ago