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Leviafan [203]
2 years ago
11

Some antacid drugs block histamine receptors, resulting in reduction of the production and excretion of stomach acid. These drug

s have the biggest effect on which of the following?
A) parietal cells
B) mucous neck cells
C) surface epithelial cells
D) chief cells
Biology
1 answer:
katrin2010 [14]2 years ago
7 0

Answer:

A) parietal cells

Explanation:

Parietal cells are the epithelial cells of the stomach that have the function to secrete hydrochloric acid (HCl) and intrinsic factor. Parietal cells contain canaliculi – secretory network for the secretion of HCl via active transport.

Parietal cells are regulated via several factors such as acetylcholine, gastrin and histamine. So, if histamine receptors are blocked via antacid drugs , the secretion of the acid will be reduced.

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Based on physical evidence, scientists have concluded that the planet earth probably formed _____ years ago, and the first life
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Planet earth was probaly formed 30,thousand years ago the first life probably evolved 29 thousand years ago
5 0
3 years ago
Pls help ill give brainkliest and 5 stars
rewona [7]

Picture 1 depicts convergent boundary.

Picture 2 depicts divergent boundary.

Picture 3 depicts transform boundary.

<h3>What is a Divergent boundary?</h3>

This occurs when two tectonic plates move away from each other while convergent boundary occurs when the plates collide with each other.

Transform boundary is a fault along a plate boundary where the motion is mostly horizontal.

Read more about Divergent boundary here brainly.com/question/8866854

4 0
2 years ago
How many variations do you observe?
masya89 [10]

Answer:

Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation). Variation may be shown in physical appearance, metabolism, fertility, mode of reproduction, behaviour, learning and mental ability, and other obvious or measurable characters.

chromosomes or by differences in the genes carried by the chromosomes. Eye colour, body form, and disease resistance are genotypic variations. Individuals with multiple sets of chromosomes are called polyploid; many common plants have two or more times the normal number of chromosomes, and new species may arise by this type of variation. A variation cannot be identified as genotypic by observation of the organism; breeding experiments must be performed under controlled environmental conditions to determine whether or not the alteration is inheritable.

Genotypic variations are caused by differences in number or structure of Environmentally caused variations may result from one factor or the combined effects of several factors, such as climate, food supply, and actions of other organisms. Phenotypic variations also include stages in an organism’s life cycle and seasonal variations in an individual. These variations do not involve any hereditary alteration and in general are not transmitted to future generations; consequently, they are not significant in the process of evolution.

Explanation:

Brainliest please?

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3 years ago
Use Chargaff’s rules to predict the missing values for E. coli, human, and ox DNA. Round your answers to the nearest whole numbe
Black_prince [1.1K]

Answer:E. coli: Cytosine- 26, Thymine-24

Human: Guanine-20, Cytosine-20

Ox: Guanine-21, Cytosine-21, Thymine-29

Explanation:

Chargaff's rules state that in a given DNA molecule the percentage of Adenine %A is approximately equals the percentage of Thymine %T and the percentage of Guanine %G is approximately equals the percentage of Cytosine %C.

Answer is

E. coli: Cytosine- 26, Thymine-24

Human: Guanine-20, Cytosine-20

Ox: Guanine-21, Cytosine-21, Thymine-29

7 0
3 years ago
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