A Type of Intercellular Connection in Which the Outermost Lipid

question 12

Multiple Choice

A type of intercellular connection in which the outermost lipid portions of two plasma membranes is fused is termed a(n)

• A) tight junction.
• B) gap junction.
• C) intermediate junction.
• D) desmosome.
• E) CAM.

Explain the significance of collar cells in sponge physiology and ecology.

Understand the diversity and characteristic features of cnidarians.

Differentiate between the various phyla of marine invertebrates based on their anatomical and physiological traits.

Describe the evolutionary significance of true nerve cells and their first appearance in the animal kingdom.

---

Definitions:

CNS Depressants

A category of drugs that slow down brain activity, leading to a decrease in arousal, anxiety, and muscle coordination, often used to treat anxiety, insomnia, and other conditions.

CNS Stimulants

Substances that increase the activity of the central nervous system, enhancing physical and mental alertness.

Hallucinogens

A class of drugs that cause profound changes in perception, mood, and thought, often leading to visual or auditory hallucinations.

Cannabis

A genus of flowering plants in the family Cannabaceae, commonly referred to as marijuana, used both recreationally and medicinally.