Generate Quiz 6A85B87B780FF

An agent that lowers the surface tension between two media is called a surfactant. A thin layer of fluid called pulmonary surfactant reduces the surface tension between the gaseous and aqueous interphase in the lungs. It is made up of proteins and lipids.

This choice is accurate because the trachea contains C-shaped cartilages that facilitate easy food passage through the oesophagus. This is due to the fact that the oesophagus and trachea are adjacent. Therefore, it would be challenging for food to pass through the oesophagus if there were cartilage plates in the trachea.

It is simpler to rule out options B and C.

To help you remember why histoplasmosis must be eradicated, use the figure below.

It is simpler to rule out options B and C.

To help you remember why histoplasmosis must be eradicated, use the figure below.

D is the right choice.

In the leaf’s epidermal tissue, abscisic acid (ABA) promotes stomata closure. Positive regulators of stomatal opening include auxin and cytokinins.

When exposed to light, starch in the guard cells is converted to malic acid, which then splits apart to produce protons. K+ ions are pumped into the guard cells in return for the protons that are pumped out. Endosmosis is the result of the potassium ions lowering the osmotic potential and raising the pH. The stomata open as a result of the guard cells becoming turgid.

Thus, choice D is accurate.

Lungs are covered by pleural membranes. The ‘pleura’ are thin, double-layered membrane sacs that cover the lung.

Some arthropods, particularly spiders and some related arachnids, have respiratory organs called book lungs. The other organisms on the list do not contain them. Gills make up the majority of the respiratory system of clams, which are bivalve mollusks. They draw oxygen from water using specialized structures known as gill filaments or ctenidia. Among the arachnids, spiders are the only ones with book lungs. The abdomen contains book lungs, which are used for breathing. They are made up of numerous thin, membrane-bound plates that are densely packed with blood vessels and arranged similarly to book pages. Between these thin plates, oxygen is exchanged. Lepisma, another name for silverfish, are insects without wings. They don’t have book lungs like spiders.

In a leaf,’stomata’ (singular: stoma) are pores that facilitate the exchange of carbon dioxide and oxygen as well as the transpirational loss of water vapor. Stomata typically close at night and open in the morning when the leaf receives light.