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AlekseyPX
3 years ago
13

Living things can be made of one cell or many. In the cell, the nucleus is the control center and directs the activities through

out the cell. The cell is a system just like the human body is a system. Cell:nucleus as human body: __________ (20 points for answering)
A) brain
B) heart
C) liver
D) stomach
Biology
2 answers:
den301095 [7]3 years ago
7 0
A) Brain

The nucleus acts as the "command center", it tells the cell what to do, and how to do it.
irakobra [83]3 years ago
7 0
The answer is the brain, or A. the nucleus controls all the cell's actions. :)
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Why does a hormone only act on specific cell types in an organism and not others?
Vilka [71]

Answer:

c) A cell must have the appropriate receptor before it can bind to the hormone.

Explanation:

Hormones are chemical signals that are secreted into the circulatory system acting as regulators within the body, and even though they can reach any part on the body, <em>only certain types of cells are equipped to respond, these cells are known as target cells, when the hormone reaches a cell with an adequate receptors it triggers a signal transduction and then a response.</em>

Therefore the correct answer is c.

I hope you find this information useful and interesting! Good luck!

5 0
3 years ago
1. The sensory layer of the eye.
Keith_Richards [23]

Answer:

The correct answers are:

1. The sensory layer of the eye. B) Retina

2. The structure most responsible for focusing light rays that enter the eye. D) Lens

3. Helps maintain the intraocular pressure; located in the anterior part of the eye. A) Aqueous humor

4. Area of greatest visual acuity. C) Fovea centralis

Explanation:

1. The sensory layer of the eye.

The retina covers the inside of the eyeball. It is considered as the sensory organ of the eye, where the perceived images are projected, are processed in the form of a nerve impulse that leaves the optic nerve.

2. The structure most responsible for focusing light rays that enter the eye.

The lens are the transparent structure inside the eye that focuses light rays in the central part of the retina.

3. Helps maintain the intraocular pressure; located in the anterior part of the eye.

The aqueous humor, is a transparent aqueous fluid secreted by the ciliary body, this liquid derived from the blood plasma, distributes oxygen and nutrients to the upper part of the eye and eliminates residual products. The dynamics of production and elimination of aqueous humor is very important to keep intraocular pressure (IOP) within normal limits.

4. Area of greatest visual acuity.

The fovea, or also known fovea centralis, is the center of the visual field, it is a narrow area of the retina that only contains cones. Its function is to help us have a vision as clear as possible with all kinds of details and precision.

4 0
3 years ago
Read 2 more answers
Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in a gamete
Greeley [361]
Since the somatic cell count of a roundworm is four, the gamete count would be two. gamete count is half of somatic.
5 0
3 years ago
I really need help plz
mariarad [96]

Answer:

A and B? im sorry if its wrong i havent learned that in a long while

5 0
3 years ago
How does a single cell become a multicellular organism?
Evgen [1.6K]
A multicellular organism develops from a single cell.
7 0
2 years ago
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