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ioda
3 years ago
5

The ____________________ system is a complex network of glands that release tiny amounts of hormones into the bloodstreams of hu

mans and other vertebrate animals.
Biology
1 answer:
andrey2020 [161]3 years ago
5 0

Answer:

The <u>endocrine</u> system is a complex network of glands that release tiny amounts of hormones into the bloodstreams of humans and other vertebrate animals.

Explanation:

The endocrine system is a set of organs, tissues and cells whose function is to release various chemical substances called hormones into the bloodstream. The endocrine glands are the group of cells that produce and release hormones, which are secreted into the blood while waiting for the proteins that are designed to specifically capture each of them, are responsible for transporting them to the cells of the tissues and organs to which they must reach. Once there, they transmit the precise orders to regulate cellular activity.

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Which type of vessel is most suited to expanding and recoiling in response to the ejection of blood from the heart?
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The elastic artery absorb most of the shock when the heart ejects blood. The expansion stores energy; the recoil disperses this energy by moving blood further through the circulation.

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3 years ago
Multicellular gametophytes are the product of spores from ____​
jolli1 [7]

Answer:

In bryophytes, the sporophyte is minute and dependent on the relatively prominent and nutritionally independent gametophyte for resources. The moss gametophyte looks like a miniature herb, with tiny leaf-like photosynthetic organs. The gametophyte generation begins as a dormant spore, which germinates under appropriate conditions to produce filamentous and branching protonemal tissues. These form multicellular bud-like structures, each of which develops into a leafy shoot. The mature gametophytes produce male and female sexual organs, the antheridia and archegonia, respectively. The gametophyte is often sexually distinct, and plants are either male or female.

Each antheridium has an outer layer that encloses and protects thousands of motile sperm, which swim through available external water layer to the egg. Fertilization at the base of the cylindrical archegonium produces a diploid zygote which develops into an unbranched sporophyte. The sporophyte consists of a thin stalk attached to the gametophyte, and a capsule that encloses the sporophytic meiotic cells.

In recent years, the mosses Physcomitrella patens and Funaria hygrometrica have emerged as attractive model systems for studying gene function in non-vascular plants because of the relative ease of molecular manipulation by homologous recombination. Mutants affecting gametophyte development have been isolated and their analysis should provide insights into the molecular basis of gametophyte development in mosses.

Explanation:

7 0
3 years ago
Which of these spheres is made up of parts of the other three spheres? a)atmosphere
madreJ [45]

Answer:

b) biosphere

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The biosphere is made of three parts, called the lithosphere, atmosphere and hydrosphere.

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Looking for good study guide will give brainliest
avanturin [10]
Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
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3 years ago
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What is the removal of a short section of stem called?
Alex

Answer:

Cuttings: Pieces of stem or root cut from a plant to produce new plants

Herbaceous cutting: type of cutting taken from plants that never form a woody stem

Leaf cutting :a cutting that includes a short section of stem with a leaf attached

Stem cutting : a cutting made from short pieces of thickened leafless stems containing at least one node.

Air layering : a type of layering in which the stem is girdled, the cut is dusted in rooting hormone, and the dusted cut is covered with moss

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4 years ago
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