Answer:
The correct answer is Hormones are secreted directly into the blood stream
Explanation:
Hormones exibit their function by endocrine signaling.At first they are secreted from a gland for Example pituitary gland ,Thyroid gland,adrenal gland directly into the blood stream.Then they are transported via blood to the target cell and bind to the receptor of the target cell thereby activating the later.
The acivation of receptor molecule generate biochemical signals that stimulates the activity of various enzymes ,growth factor to carry out the biochemical process related to the functioning of the target cell.
Answer:
The primary function of glucose molecules is to provide energy for cell activities.
Explanation:
Glucose can best be described as carbohydrate which serves best as a primary fuel. Our body cells carry out a wide number of metabolic as well as biological functions. Glucose serves as the main energy derivation molecule for the accomplishment of these biological and metabolic functions. Every cell present in the body acquires the capability of using glucose as energy molecule.
Glucose is broken down by complex biological reactions into ATP which is the energy source for many cellular activities.
Answer: Different chambers of the heart perform different functions.
Explanation:
The human heart has four chambers the two atria as well as two ventricles. The function of the lower chambers of the heart is to pump out blood. The atria or upper chambers receive blood. The right atrium obtains blood from the superior vena cava then the blood moves towards the right ventricle where the deoxygenated blood is pumped out to the lungs. From the left ventricles the blood is pumped to all the parts of the body.
The Y chromosome likely contains 70 to 200 genes that provide instructions for making proteins. Because only males have the Y chromosome, the genes on this chromosome tend to be involved in male sex determination and development.
<h3>What is a chromosome?</h3>
A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. Histones, which serve as packing proteins for the majority of eukaryotic chromosomes, work with chaperone proteins to attach to and condense the DNA molecule in order to preserve the integrity of the molecule. These chromosomes exhibit a complicated three-dimensional structure that is crucial for controlling transcription.
Under a light microscope, chromosomes are typically only discernible during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form).
Prior to this, each chromosome undergoes a process known as chromosome duplication (S phase), during which a centromere connects both copies, forming either the X-shaped structure (if the centromere is situated equatorially) or a two-arm structure (if it is situated distally) depending on where it is situated.
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