Answer:
Clavicle.
Explanation:
Answer:
b. phenotypic variation of a trait in a particular population.
Explanation:
Heritability describes a statistical measure that indicates variation in phenotypes (traits present) in a particular population.
An estimate of heritability of a trait is specific to a studied population in a determined environment, and it could change over time as circumstances often change. Heritability estimates range in a scale from zero to one.
Factors leading to this will be both ambient, and genetical. The case below exemplifies envirnoment impact.See below for a clearer view:
Answer:
a. pancreas
Explanation:
As for exocrine organs, they release secretions. Since the pancreas is an exocrine gland its nervous or hormonal stimulation causes pancreatic secretions to be released into the duodenum through a duct. Together the secretions of alkaline and contain enzymes like lipase, amylase,etc . They are present in digestion. However the pancreas has two main functions, exocrine function and endocrine function. While exocrine cells of the pancreas produce enzymes that help digestion. An as endocrine , the islet cells of Langerhans inside the pancreas produce and secrete insulin and glucagon into the bloodstream.
Answer:
The four cameras of the heart are:
1) Right atrium = it receives venous blood from the cellars and, through the ventricular valve, sends it to the right ventricle.
2) Right ventricle = receives blood from the right atrium, which sends blood to the pulmonary artery and is in turn to the lungs for oxygenation.
3) Left atrium = receives the oxygenated blood that comes from the lungs through the pulmonary veins and in turn sends it to the left ventricle through the left atrio-ventricular valve.
4) Left ventricle = receives the oxygenated blood coming from the atrium and through the aortic valve sends it to the aortic artery, which in turn distributes it to the entire body.
Answer:
Answer:
The heart is made of cardiac muscle. (myocardium)
Explanation:
The myocardium is one of the three variations on vertebrate muscles, as shown in the image below. It contrasts to skeletal and smooth muscle in that it acts involuntary, it is a striated muscle constituting the dominant tissue that makes up heart's walls.
As the cardiac muscle posses a thick middle layer between the outer layer  (called the epicardium) and the inner layer (known as endocardium) the blood is provided through coronaries (blood circulating in the coronary or heart veins).
Heart muscle cells are put together by discs, rich in collagen fibres and substances that keep it working since birth and until death.
Ventricles are responsible for irrigating with blood, as capilars are indispensable for the high energy requirements of the main muscle and motor of the organism
Below are the different muscle tissues:
Explanation:
Sorbitol (glucitol) is a type of sugar alcohol that human body metabolizes very  slowly.
It can be obtained by the reduction of the glucose in which the aldehyde group is converted to a hydroxyl group.
If too much sorbitol is trapped in the cells of the lens, it can lead to cataracts, retinopathy and peripheral neuropathy.
The open chain structure of sorbitol is shown in the image below.
Answer:
The diagram of a twitch is given below:
Explanation:
The three main component of muscle twitch are contraction period, latent period and relaxation period. The calcium ions is released during the latent period of the twitch. The muscle tension decreases during the contraction period and muscle tension increases during the relaxation period.
Answer:
The tunica interna of blood vessels is made of endothelium and is supported by a subendothelial layer with a internal elastic lamina beneath.
Explanation:
Answer:
Trachea
Explanation:
The trachea is anatomically positioned anterior to the esophagus.Has the shape of a tube made of cartilage and connects the pharynx and larynx to the lungs and allow the passage of air.
Answer:
C. Hypertonic
Explanation:
In a hypertonic solution, the EC fluid has a higher osmolarity than the cell's cytoplasm, so water inside the cell will move out to the region with a higher solute concentration.
When a cell is placed into a hypertonic solution, cell shrinks which is also known as Crenation. Â
Answer: Option C
Explanation:
Crenation refers to shrinking of the cells. When the cell is placed in the hypertonic solution in which the concentration of solutes is less inside the cell when compared to the outside of the cell. Due to this reason the water present in the cytoplasm of the cell moves out to the environment by process called as osmosis. Â
As the water moves out, the cytoplasm shrinks which in turn causes formation of crack like structure and thus leads to crenation of the cells.