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Zinaida [17]
2 years ago
11

The cell membrane plays an role in the transport of substances into and out of cells. Which is an example of passive transport?

Biology
1 answer:
ivann1987 [24]2 years ago
6 0

glucose entering a cell through proteins in the membrane requiring the use of ATP

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What level controls intermediate relay for incoming and outgoing neurons?
Ira Lisetskai [31]

Answer;

-Projection level

-Projection level controls intermediate relay for incoming and outgoing neurons.

Explanation;

The levels of motor control include; segmental level, projection level and precommand level.

-The segmental level is the lowest level of motor hierarchy. It consists of segmental circuits of the spinal cord, Its circuits control locomotion and specific, oft-repeated motor activity. These circuits are called central pattern generators (CPGs).

The projection level consists of: Cortical motor areas that produce the direct (pyramidal) system, and Brain stem motor areas that oversee the indirect (multineuronal) system . It helps control reflex and fixed-pattern activity and houses command neurons that modify the segmental apparatus.

Precommand level; Cerebellar and basal nuclei systems that:

-Regulates motor activity, precisely start or stop movements, coordinate movements with posture, Block unwanted movements , and Monitor muscle tone.

6 0
3 years ago
1) How is DNA condensed to form a chromosome?
frosja888 [35]

Answer:

Hello! Here are the answers:

  1. Chromosomes are a highly condensed form of a combination of DNA and protein called chromatin. DNA strands (negatively charged) are tightly wound around these proteins called histones (positively charged) to form chromosomes.
  2. Mechanism genes code for for proteins that govern life processes. These genes or portions of DNA  are called exons. DNA segments between these exons are called introns that strictly code for regulatory proteins and also contain genetic regulatory elements (DNA sequences that control gene expression).
  3. Gene expression is the process of translation of DNA sequences into proteins. The genetic code is the nucleotide sequence in the DNA itself that codes for different amino acids that combine together to form a functional protein.

Explanation:

* 2. The intronic regions are misleadingly referred to as "junk DNA" but introns code for crucial regulatory elements that control gene expression.

* 3. The genetic code determines the sequence of amino acids in various proteins.

7 0
3 years ago
Which characteristics must an object posses in order to be considered alive?
enot [183]
The object has to possess movement, growth and development, response to stimuli, reproduction, use of energy and possession of cellular structures.
HOPE THIS HELPS!
5 0
3 years ago
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Energy is required for a variety of life processes including
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What is the name of the cells that control the opening and closing of the stomota
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guard cells

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they control the opening and closing of the stomata

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