Answer:
lungs:
The blood first enters the right atrium.
The blood then flows through the tricuspid valve into the right ventricle.
When the heart beats, the ventricle pushes blood through the pulmonic valve into the pulmonary artery.
The pulmonary artery carries blood to the lungs where it “picks up” oxygen.
It then leaves the lungs to return to the heart through the pulmonary vein.
The blood enters the left atrium.
It drops through the mitral valve into the left ventricle.
The left ventricle then pumps blood through the aortic valve and into the aorta. The aorta is the artery that feeds the rest of the body through a system of blood vessels.
Blood returns to the heart from the body via two large blood vessels called the superior vena cava and the inferior vena cava. This blood carries little oxygen, as it is returning from the body where oxygen was used.
The vena cavas pump blood into the right atrium and the cycle begins all over again.
Answer:
Two people with brown hair could have a child with blonde hair, but only if they are both heterozygous.
Answer:
physiologist
Explanation:
A physiologist is a person or a professional who studies and does experiments to see the function and behavior of plants and animals under normal circumstances as well as abnormal circumstances. They also study and learn the impact of the human life on the species and how the specimens they interact with each other.
In the context, an experimenter conducting an experiment to see the affect of heart beat rate when the temperature changes is known as a physiologist.
Answer:
A. Endomembrane system is involved in the production of proteins and how they are transported into membranes, organelles or out of the cell. They are also involved in metabolism and transportation of of lipids; and neutralising poisonous substances. Membranes are connected either through physical continuity or through vesicles (i.e. sacs made of membranes). Thus, endomembrane system consists of nuclear envelope, endoplasmic reticulum, golgi apparatus, lysosomes, vacoules and plasma membranes. Endomembrane system is not found in prokayotic organisms.
B. After enzyme has been coded for in the nucleus and successfully transcribed in the nucleus; and translated in the cytoplasm, the enzyme will be transferred from endoplasmic reticulum to golgi apparatus, where it is modified and packaged to exit the cell membrane for desired destination.
Answer:
To maintain body homeostasis
Explanation:
The endocrine system consists of the endocrine glands that release hormones directly int the blood. Those hormones bind to their receptors on the target cells and thus regulate their function. The major glands are:
pineal gland-releases melatonin, controls sleep cycle
pituitary gland-control growth, blood pressure, thyroid glands and metabolism etc.
pancreas-secretes insulin and glucagon, control of blood sugar levels
ovaries, testes-reproductive role (release female and male hormones)
thyroid gland-controls metabolism and protein synthesis
parathyroid gland-controls Ca levels
hypothalamus-connects nervous and endocrine systems, controls other glands
adrenal glands-release adrenalin and steroid hormones.
