Answer:
The sequence is b, a, d, c.
Explanation:
Pulmonary ventilation may be defined as be defined as the simple process of intake of oxygen and exhale of carbon dioxide known as breathing. Diaphragm contracts during inspiration and relax during exhalation.
The pulomonary ventilation occurs when the skeletal muscle contraction occur by the stimulation from the brainstem nuclei. This leads to the changes in the volume of the thoracic cavity. The thorax changes its shape by contraction and relaxation, this leads to the pressure change. Then air flows down the pressure gradient.
Thus, the correct sequence is b, a, d, c.
Answer:
Acid reflex -- Tupid cell rules
Explanation:
Acid reflex. Cells never use this ability until well into the stone ages. Acidic cells need to transfer their proteins before mitosis, so acid reflex is a paradox when everything is following Tupid cell rules.
Answer:
The correct option is c. The sensors for the arterial baroreceptor reflex are located in carotid sinus and aortic arch.
Explanation:
Baroreceptors are primary sensors (or mechanosensitive nerve endings) that detect distention in vascular walls and are stimulated by mechanical deformations during blood vessel stretching. They are located in the carotid sinus and the aortic arch. The stretching the vessel walls at any of these locations causes vasodilation and bradycardia. The baroreceptors detect the stretching of the vessels due to changes in blood pressure, through them a more efficient control of blood pressure is achieved.
Answer:
During DNA replication, the leading strand is synthesized in the 5' to 3' direction. The strand that runs away from the replication fork is synthesized in Fragments because DNA polymerase cannot synthesize in the 3’ to 5’ direction.
Explanation:
- A replication fork has one strand called the leading strand, it is synthesized continuously from a single primer on the leading strand template and grows in 5'-3' direction.
- The leading strand grows in the same direction in which the replication fork grows.
- The other strand is the lagging strand that is unveiled by the growing replication fork. It proceeds in the direction opposite to the movement of growing replication fork.
- The lagging strand is synthesized discontinuously because the DNA polymerase can add nucleotides only to the 3' end of a primer.
- These short pieces of synthesized DNA are okazaki fragments.Okazaki fragments are joined later by ligase.
Answer:
Según el CERN, en los primeros instantes del Big Bang no había demasiado calor como para que se formen átomos, como el hidrógeno (el elemento más abundante del universo). En estos primeros instantes, mucho antes que se cumpla un segundo (10 a la menos 32), solo había quarks y fotones.
